What is a chimney swivel and how it is used

A functional chimney is essential for keeping your house warm and comfortable during the colder months. However, are you familiar with chimney swivels? This useful tool is essential to preserving the effectiveness and security of your chimney system.

A chimney swivel, alternatively referred to as a chimney cap or cowl, is a shield that is placed over your chimney for protection. It keeps animals, snow, rain, and other elements out of your chimney, among other crucial functions. These elements can damage your chimney and even put you at risk of fire if you don’t have a chimney swivel.

However, a chimney swivel can do more than that. Additionally, it aids in enhancing your chimney’s draft, which is necessary for adequate ventilation and effective combustion. The chimney swivel improves ventilation and lowers the possibility of smoke and backdrafts entering your house by diverting wind and producing a slight vacuum effect.

A qualified chimney technician can complete the simple task of installing a chimney swivel. To accommodate different chimney types and aesthetic tastes, they are available in a variety of designs and materials. Spark arrestors are integrated into certain chimney swivels to stop sparks and embers from escaping and starting roof fires.

In conclusion, a chimney swivel is a tiny but crucial part of the heating system in your house. It guarantees a safer and more effective fireplace or heating appliance by improving the performance of your chimney in addition to shielding it from the elements. Thus, if you haven’t already, think about making an investment in a chimney swivel to protect your house and have cozy, worry-free warmth throughout the winter.

What is a chimney swivel	How it is used
A chimney swivel is a device installed at the top of a chimney.	It allows the chimney cap to rotate with the wind, preventing downdrafts and improving draft efficiency.

What is the use of a slide gate valve for?

After using the stove, the chimney channel can be closed with the help of a damper. This device’s holes prevent the chimney channel’s cross-section from being completely blocked. It’s important to keep in mind that an open gate valve signifies the start of the fireplace, and a closed one indicates that the chimney is not being used.

A crucial indicator that impacts both the overall heating system efficiency and the effectiveness of the combustion products exiting the chimney is chimney draught. For this reason, controlling draft using the gate element is crucial. If the system’s draught level is higher than what is allowed, the gate element’s position needs to be changed. This type of damper modifies the flue duct’s cross-sectional index to control the draught.

The gate elements also control how products burn inside the heating device, which is another crucial job they do. This element controls the air flow within the system, which in turn controls the intensity of combustion. It is important to note that installing gate valve products is prohibited if the device uses air inlets to process raw materials for heating.

Stainless or galvanized gate valves are the most resilient and simple to maintain.

These products are typically composed of stainless steel, which has good strength properties. Both harmful corrosive effects and active chemical compounds generated inside the chimney flue are resisted by stainless steel. The slide gate’s thickness ranges from 0.5 to 1 mm. Schiebers can tolerate temperatures as high as 900 degrees Celsius and are known for their high thermal resistance.

Information that is helpful! Selecting gate valves with a polished surface is advised. The polished damper is simpler to operate and soot-clean.

Up to 85% of the chimney channel can be covered by the rolling seam damper, which has this feature. These features have increased the product’s popularity among buyers.

Method of operation of the damper

According to the knife principle, the gate valve’s upward and downward movement drives its operation. The gate valve can be turned on or off manually or mechanically. When operating manually, the working body is moved by turning the handle, which causes the spindle to transfer the movement to the gate and raise it.

When the drive is mechanical, the motion is transferred from it. When the gate disk is in the closed position, the valve’s flow is stopped.

Scope of use of gate valves

Gate valves are installed in streams that are contaminated when a high degree of device tightness is not necessary. As a variation, the apparatus is employed to control and lower the flow power.

Pros and cons

One of the clear benefits is that the chance of stagnation phenomena is eliminated. The retractable spindle contributes to the relatively large working height and incomplete flow sealing, which are drawbacks.

The design is quite suitable and works well in pipelines, sewage networks, and agriculture if no special requirements apply. The device’s gate valve’s simplicity and ease of use, which prevent malfunctions during operation when different types of debris are flowing through the stream, are further benefits.

Bulk and liquid flows can be successfully managed with a gate valve. The product comes in a variety of diameters during manufacturing.

Manufacturing processes and materials

The design’s sealing surfaces come in the following variations: clad in corrosion-resistant steel, fitted with brass or fluoroplastic rings, or without any rings at all. Rubber is utilized to cover the wedge in wedge constructions and to create a squeeze hose in hose constructions.

Cast iron, metal, and aluminum alloy are used to make cast gate valve bodies. Stamped billets are used to weld metal and titanium products.

Video: Slide gate valve operation principle

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Gate valve design. Varieties

The ability of the gate valve to hermetically close off the pipeline regardless of the material structure sets it apart from other kinds of shut-off valves. A flat or wedge-shaped knife serves as the device’s shut-off element. This accessory gate valve slider moves perpendicular to the flow, cutting it until the cross-section is closed off. These fittings are typically categorized based on the locking element’s shape. There are knife gate valves and wedge gate valves based on this criterion.

Device shaped like a wedge. Because the wedge gate valve can function at higher medium pressure, it is installed when the most reliable flow stoppage is required. Its shut-off element is wedge-shaped, as implied by its name. Seal-equipped seats all have the same shape. This device is primarily utilized as a sewerage gate valve.

The force generated by the spindle’s rotation causes the wedge to move perpendicular to the working medium’s flow direction. The wedge created by the applied force deforms within the natural elasticity of the material at full closure of the lumen, resulting in maximum sealing.

Experts stress the following drawbacks of the wedge-type gate valve device:

• the seals fail quite frequently in case of intensive operation of this device;
• the need for a labor-intensive procedure of adjusting the seat and wedge in such a gate valve;

Because of the wedge in its construction, the wedge gate valve stops the working medium’s flow.

• If the wedge surface is damaged (deep scratches, scoring, corrosion), the sealing will be broken. In addition, such damage can cause the mechanism to jam;
• The wedge of this gate valve expands during transportation of the medium with high temperature. This factor leads to the impossibility to regulate the flow, because of which emergency situations may occur.

Knife-style gate valve. These valves’ shut-off element functions similarly to a regular knife and is distinguished by its comparatively thin thickness.

Note: As a result, knife gate valves can be used for almost any purpose on pipelines, giving them a nearly infinite range of applications.

They have trunk lines installed.

• mining industry;
• pulp and paper mills;
• oil refining industry;
• sewerage and ventilation systems.

It is noteworthy to mention that the knife gate valve is applicable even to branches that function in rarefied environments. In this instance, vacuum technology is at issue.

Installation details

In the case of pipe-to-pipe installation, the damper is mounted in the ends of the duct and does not require the use of fasteners. The joints are carefully sealed with silicone sealant. If hot or moisture-laden air is to be vented, heat-resistant and water-resistant compounds should be used. It is allowed to use ventilation only after the material is fully cured. In addition to sealant, good results are obtained by using butyl rubber tape, which is able to withstand temperatures of 100 degrees and more. Slightly less heat-resistant ability has a heat-shrinkable collar, which contains a thermo-melting adhesive layer. Such a sealant is able to work at high humidity and temperature up to 80 degrees Celsius.

When installing gates on rectangular cross-section ducts, the flange method—which is governed by SNiP 3.05.0185—is employed.

• The main condition for installation is the use of fasteners. They are made of high-strength materials and are able to withstand aggressive environmental influences.
• The flanges should be secured with four or more bolts, and all of them should be located on the same side of the installed flange.
• When the unit is positioned in horizontal planes, the heads of the fixing bolts must be on top of the unit.

• After installation it is necessary to check the operation of the damper. The gate must be able to open and close freely without dangling or getting stuck.
• The flange connection requires mandatory sealing measures, for which porous foam or shrink mastic made of bitumen and polymers can be used.
• When installing electrically operated models, care must be taken to have a 220 volt power supply near the damper.

Retractable products are easily assembled on their own because of their straightforward design and simplicity of installation. Nevertheless, using homemade models is only permitted if ventilation systems are installed with them. It is highly advised to use factory-made models when installing slide dampers in the chimney system of a wood stove or fireplace. This is a result of fire safety regulations, which must be strictly adhered to.

One crucial component of the ventilation system is the gate valve. It helps control the amount of air that enters the space and prevents cold air from entering during the winter.

Mounting with your own hands

Three methods exist for installation:

1. The slide gate is installed in the firebox itself. The slide damper is installed one meter away from the heating device, allowing the slide damper to be easily operated.
2. The second way to install the slide gate is to combine it with other parts of the heating construction without additional use of fasteners. Also this variant of installation is called "pipe in pipe".
3. The third way to install the gate valve is to install it in ventilation pipes. In this case, the gate valve is used to prevent the fan motor from overheating when it is turned on.

Note: To prevent undue strain on the motor, the damper should be closed during the installation process rather than being open.

When building chimneys or ventilation systems, these three fundamental methods of installing a slide damper are frequently employed.

Stoves and fireplaces come in various models, each with a unique method of heating. Therefore, a different kind of gate valve is needed for each model.

For instance, in order to prevent the flame from going outside, a stove that uses gas heating needs a traditional butterfly valve, also known as a "butterfly valve," or occasionally an automated butterfly valve.

However, installing a butterfly valve at this location is not advised as it will let steam through when closed and is very difficult to clean when open.

The slide damper is typically offered as part of a complete package along with the chimney. However, some chimneys do not have one, so one can DIY the damper by purchasing the parts from different building supply stores.

Be aware that prior to purchasing the gate valve, it is crucial to ascertain the necessary measurements. Purchasing gate valves composed of steel is the best option.

The shell is the primary component of the gate installation. The sliding gate is made up of multiple shells.

How to install a chimney damper

The damper and the are installed simultaneously. There are a few different locations for it, but the damper on the chimney flue’s first meter is the most popular. This placement makes perfect sense because it makes opening the gate valve convenient in this situation. Let’s take a closer look at this installation technique.

You can install the gate valve after constructing the first row of the brick chimney. First, a small portion of the gate valve must be removed. Create a through hole in one of the bricks for the handle, then install the second row, accounting for the thickness of the sand-cement mixture layer that will house the damper. Ensure that it is as near to the initial one as feasible. Prevent the creation of gaps.

Place successive rows on the cement-sand mortar, being cautious not to let any gaps appear.

A piece of advice: Leave the installation of the gate valve to the experts if you are unsure of your skills and abilities.

Use of electrically operated knife gate valves. Varieties

Water supply systems are the range of applications for the gate valve with an electric actuator (diameter DU 50). The BB32 electropneumatic gate valve is used in mixers, sewage systems, and pumps. The DU100 electric actuated shut-off device finds extensive application in wastewater treatment and drinking water transportation mains. The control cabinet manages the parameters of the input voltage and controls the gate element’s functionality.

For various kinds of pipelines, an automated control system can incorporate electrically operated gate valves.

When complete automation of submersible pump operation is required, a rack and pinion gate valve with an electric actuator is installed. The control cabinet produces incredibly accurate signals, which guarantee the valve operates correctly.

The water consumption is also regulated by the electric actuated rack and pinion devices, which are in permanent use. The medium flow can be regulated by installing a remote column on an electrically powered slide gate valve.

In firefighting or irrigation systems, the highly accurate 30s941nzh model wedge steel gate valve regulates the volume of liquid supply in accordance with the initially set mode. Moreover applicable to gas transportation systems for oil, gas, steam, and oil products. Wedge gate valves with electrical activation are permitted to function in pipelines that transport working media up to +425°~¡ in temperature.

It wouldn’t be a discussion about shut-off components without bringing up the existence of knife gate gate valves that are operated by pneumatics in contemporary industry.

Crucial! When it comes to completely and reliably preventing contact between the actuator mechanism and the transported flow, compressed gas is a must. Such devices are classified as jet and piston devices based on the "principle of operation" criterion.

Such shut-off elements are designed with a low-inertia jet turbine. The pneumatic slide gate valve’s realization is predicated on the idea that it will operate flawlessly because of:

These devices are classified as jet or piston devices based on the "principle of operation" criterion. This kind of shut-off element is designed with a jet turbine with low inertia. The pneumatic gate valve’s realization suggests that it will function flawlessly because of:

• exclusion of rubbing seals;
• irreversibility of movement;
• smooth running at all control gas pressures and under all loads;
• quick reversal of the drive shaft.

The ability to operate the gate valve remotely is its primary benefit when it comes to pneumatic actuation.

Finally, it is important to note that you should carefully consider the technical aspects of gate valves before selecting one. Only then won’t there be any issues with flow control.

Types of gate valves

There are various kinds of gate valves for stoves and fireplaces:

• Extendable horizontal installation. In this case there is a plate inside the damper, which extends, as a result of which the size of the cross-section of ventilation or chimney pipes changes. This type of shutter is used in the construction of brick chimneys, they are characterized by a horizontal location. The plate has special small holes – they even in the closed position do not completely block the ductwork. This feature makes it possible to avoid future fires.

• Classic butterfly valve of rotary type. This type of gate valve functions due to the rotational movement inside the ductwork. This gate valve consists of a metal body and a removable rotary disk. In case of prolonged use, it may become defective, but it will not be difficult to replace the part. This procedure can be performed by own efforts. The entire design of the throttle installation of the classic type, even in the absence of certain skills can be done with their own hands. This type of gate is characterized by convenient use, it does not require constant control of the property owner.
• Chimney air slide gate valve. It refers to regulating parts controlling the amount of fuel in the furnace chamber. The working process is controlled automatically.

Varieties of gate valve designs

The gate valve’s regulating and shut-off component may be shaped like a knife or a wedge. Depending on the kind of gate, the gate valve is referred to as a wedge or knife gate.

Furthermore, each type of shut-off element is further classified into multiple subspecies based on the gate’s specific design characteristics.

Wedge type gate valve

These gate valves have two seats inside their bodies that are angled toward one another and the body. With its surfaces angled at a ratio equal to the angle between the seats, the gate valve resembles a wedge.

When the wedge is closed, the flow is tightly sealed off by fitting snugly between the seats.

Additionally, even though the wedge gate valve can tolerate a lot of pressure from the materials being transported, it will soon fail under continuous high pressure. Additionally, this mechanism is not appropriate for turning off heated working media because the heated wedge expands and deforms, compromising the integrity of the connection with the seats. Using this kind of gate valve in technical pipelines carrying heavy, hard particles that could scratch the gate valve is also illogical.

Note: If working medium particles get between the seats and the wedge, the mechanism may completely fail. Scratches and grooves also lessen the shut-off element’s sealing capacity. There are three different kinds of wedge gate valves:

Wedge gate valves come in three different varieties:

1. Rigid. The wedge of this type is made in the form of a solid plate with a variable thickness. The simplest gate valve to manufacture is the most difficult in seat fitting. And at the same time, all the above-described disadvantages of the wedge-shaped gate valve are characteristic to a greater extent just for the rigid wedge: clogging, seizure of the mechanism, loss of tightness in case of damage and thermal expansion.
2. Double-disk. The wedge is formed by two smooth disks rigidly fixed at a certain angle. Increasing the number of parts of the mechanism, which usually increases the complexity of construction and reduces its reliability, in this case, on the contrary, makes the gate valve easier to manufacture and operate. Disks are less demanding than a rigid wedge in terms of seat alignment, and a small error in fit does not reduce the tightness of the gate valve in the closed position. The seals in this mechanism wear less, the construction is wedged less often, due to which the total overhaul service life of double disc gate valves is longer than that of rigid gate valves.
3. Elastic. In this type of gate valve, the two disks are elastically connected and the connecting element is able to change its shape, adjusting to the angle between the seats. Due to this movable design, the gate valve does not lose performance under temperature and hydraulic deformations of the body.

Knife gate valve

The second kind of gate valve consists of a thin plate for the gate and two seats that are precisely across the body’s passage hole. The damper has a fitting name because it stops the flow in the same manner as cutting through any material.

The capacity of the assembly is altered by the knife’s movement between the seats. Knife gate valves have a long service life because these gates are constructed from high-strength materials that are resistant to many types of damage.

Knife gate valves come in two varieties:

1. Single knife. The locking combination consists of one strong and dense blade and a pair of seats located in the body. Inexpensive version of the gate valve, common in household pipelines.
2. Double-knife or parallel. The locking element consists of two parallel blades, the mutual arrangement of which is rigidly fixed. Provides greater tightness than the single knife gate valve, but is much more expensive, so it is only used in large industries.

Scope of application

The gate valve has only two functions: shut-off and flow regulation. Despite this, it is utilized in a variety of industries because of its design characteristics and flexible execution.

• domestic and industrial water supply and drainage;
• wastewater treatment systems;
• transportation of gas, oil and refined products;
• mining industry;
• production of food and non-food consumer goods;
• ventilation systems for various purposes.

Kindly take note! Gate valves with a wedge shape are most frequently used in drainage and water supply systems. Knife valves are primarily used in other fields as a more straightforward and dependable valve.

Sliding gate valve for a chimney

Particular consideration should be given to the chimney gate, which is the first slide gate valve. Its design is very basic, with just seats and a knife flap in place of a control mechanism and seals. It has a long history.

This is fascinating! The term "gate valve," which refers to the gadget, is German for "flap" or "slide." As a result, a gate valve refers to both the knife gate itself and the entire shut-off and regulating mechanism.

Since there were no alternative methods to control the draught, antique stoves and fireplaces without a damper were not constructed.

The knife gate was erected across the chimney. It was a rectangular plate of cast iron with a handle. A cast-iron frame was inserted into slots carved out of the chimney walls at a height marginally above a man’s height. This allowed the gate valve to be moved freely back and forth, functioning as a set of seats. The damper plate handle extended beyond the chimney shaft, enabling the gate valve to be adjusted from fully open to fully closed, thereby smoothly controlling or totally stopping the airflow in the chimney.

When the damper is open, the chimney’s draught is at its greatest, all of the flue gases are released, but warm air from the building also flies into the chimney. When the heating appliance is turned on, the damper is typically fully opened. From there, it is adjusted to create the ideal draft, which allows the fire to burn and heats the house. To prevent heated air from escaping through the chimney, close the damper when the fuel burns completely through and the smoke stops.

This clever draft control mechanism is still required for modern stoves, fireplaces, and boilers, particularly solid fuel boilers. However, the need to alter the gate valve arose with the introduction of variety in the building materials for the chimney. For combined flue structures and rectangular-shaped flue shafts, cast iron slide gate valves are still widely used. To allow the damper to travel freely across a round chimney, a plug with seats must be installed.

Kindly take note! Chokes, which are rotary dampers, are another feature of round chimneys. This mechanism is sometimes referred to as a rotary gate valve because it also controls flow. Nevertheless, the functioning mechanism of such a damper is entirely distinct, more akin to a rotary valve than a traditional knife gate valve.

The device for regulating ventilation is a gate valve

It is enough just to put the damper, and it will act as a damper screen. Gate valves come in various designs, and are intended for pipes of different cross-sections and devices. There are round, and there are square and rectangular shapes. The damper can also be used as a sandwich chimney, then it is equipped with double walls, between which there is a layer of thermal insulation. The damper is used wherever draught control is needed. Such systems can include stoves, fireplaces, as well as ventilation shafts, and similar systems. Gate valves can even be used in large-diameter pipelines without media pressure inside the pipe. It is actually a gate valve, as can be seen in the photos below.

If there is no need for a valve, it is possible to do without one. For instance, since the level of fuel supply regulates the combustion process, it is not required in systems with gas or liquid fuel boilers. Where there is an air supply and spontaneous combustion, a gate valve is required.

A gate valve is a gate valve intended for controlling flow.

Flows can come from a variety of media, such as loose, dry, petroleum products, etc., in addition to air (as in ventilation or chimneys).

Pipelines are additionally equipped with gate valves.

(Votes for gates).

A gate valve not only allows for the regulation of the flow force but also allows for the separation of flows.

The damper in a chimney controls how much draught comes in or out.

When using a wood stove, for instance, slightly closing the gate valve will keep the wood from burning out too soon. This is one way that the gate valve helps save fuel.

What you mean by the second part of the question is not clear to me.

In straight pipeline sections with other (other) flow control mechanisms in place, a gate valve need not be used.

If you are inquiring about chimneys, for instance, the gate valve is not installed in fireplaces because the air supply controls combustion, or more accurately, the burning process.

More questions on your topic:

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Classification of gate valves

One of the gate valve’s primary components, the body shields the internal components from external impact and mechanical harm. The human body has the capacity to assume both rectangular and cylinder shapes. Gate valve bodies come in a variety of forms, including monolithic (single, one-piece), prefabricated, and welded constructions. A few producers provide bundled versions of the protective housing components.

Gate valves are separated into plate gate valves and plate gate valves according to the type of installed gate valve (closing element). "Knife" and "guillotine" valves are additional divisions within the category of shut-off valves with plates. A spigot that is installed on the opposite side of the plate is part of the opening in the construction of the first type of gate valves, which are monolithic plate gate valves. According to their names, the knife gate and guillotine gate are sharpened to resemble knives or angled blades (like a guillotine).

Gate valves are divided into two groups by the installed seal: metal/metal and metal/synthetic. In order to close the gate valve with an absolutely tight connection, the type of sealing element that is used is crucial. When creating gate-style seals, the following artificial materials are used:

• nitrile rubber – resistant to chemical attack material;
• ethylene propylene diene rubber (SCEPT/EPDM);
• rubber compounds with the main component SCN for hot media;
• frost-resistant Viton material;
• silicone.

Gate valves can be classified into two categories based on how they operate and are controlled: manual gate valves and gate valves with automatic actuators. The manual control method requires the existence of a mechanism that allows the gate valve’s position to be changed. Thus, the following mechanism is employed:

• square or round nozzle;
• valve with handwheel;
• handwheel with static or retractable stem;
• lever;
• T-shaped wrench.

Gate valves that are controlled mechanically or automatically may have:

• pneumatic actuator – allows both one-way and two-way movement, and is also equipped with a handwheel with adjusting bolts;
• hydraulic actuator;
• electric actuator – equipped with limit switches in the extreme positions of the knife-type gate valve;
• combination drive.

Gate valves are classified as follows based on the kind of connection they have with the main pipeline:

• flanges;
• interflange;
• welding.

Note that skilled installers also use interflange gaskets, bolts, studs, and other connecting components with any attachment method.

Technical characteristics

The location of installation, air mass temperature, and duct shape all have a direct impact on gate valve design. Because of the constant need for cleaning and the requirement to operate in temperature variations, all gate valves have perfectly smooth surfaces. Furthermore, the damper needs to have a slotted opening or perforations. This will guarantee the maintenance of a pleasant microclimate and prevent the room’s fresh air intake from being entirely closed off.

The gate valves rotate and can be retracted. The first are steel straight gate valves that are utilized in forced air circulation ventilation systems. They are positioned in opposition to the direction of flow. You can regulate and adjust the air flow volume as needed thanks to this design.

Systems for natural draft ventilation can use rotary models, also known as throttle dampers. The models are activated by a rotary knob and are displayed as a plate that is fixed on an axis. With each turn of the handle, which is secured to the plate by a bolt and wing nut, the damper is opened by 10 degrees. The damper’s components are all made of galvanized steel, which is sometimes painted in addition.

Installing dampers in supply and exhaust systems takes place in the duct break preceding the fan. The damper is arranged so that the fan motor cannot overheat. It is closed when the fan is started and opens when the number of revolutions reaches the operating parameters. Here, the damper doubles as a starting damper, boosting the fan’s effectiveness and prolonging its lifespan.

Functions of the gate valve

The function of this varies based on the application. A gate valve will limit the flow of liquid (bulk mixtures) in a pipeline system when it is utilized as a shut-off valve. A flip gate is another name for this kind of gate valve.

The gate valve controls the flow of fluid. The damper can be moved forward and backward to alter the air flow rate through the structure and partially or totally block the flow path. We refer to this kind of gate as a regulating gate.

The damper in the chimney serves as a regulator damper, allowing the cross-section of the flue duct to be closed partially or entirely. This minimizes heat loss from the heated room.

The chimney damper also serves as a draught regulator, which means that it controls the flow of smoke. This situation illustrates the general rule that less air enters the chimney and the draught lessens the more of its cross-section is blocked. On the other hand, the more open the gate valve, the more air and stronger the draft, which results in a much faster and more intense combustion process.

Uses

Slide gate gate valves are used in pipelines, filter plants, and purification processes (usually involving "dirty" pipelines). This indicates that the strong and dependable gate valve can effectively stop the flow of potent mud flow. They are suitable for installation on high-pressure pipelines.

Is defined as solid inclusions and particles, rock, oil, and various liquids containing pulp, granules, and other contaminants.

Gate valves are categorized into models intended for use in different industries based on the wide range of pumped working media. Specifically, these gate valves are most frequently used in the following areas:

• chemical industry;
• oil and gas industry;
• sphere of production of building materials;
• utility industry;
• mining industry;
• pulp and paper industry;
• power generation, etc.

Slide gates are frequently used in sewage systems and drains because of their capacity to filter and grind particles that pass through them while also allowing large volumes of working medium to pass through. They are highly sought after by chemical plants, which have state-of-the-art production lines for ammonia, mastics, acids, and various fertilizers. Gate valves of the gate type are used in the mining industry to help filter and dose useful components so they are ready for additional processing.

The oil and gas production industry is a different area of application that is governed by the normative documentation GOST 55020-2012. In this region, fountain valves on major pipelines are equipped with gate valves.

In the realm of heating and insulation for your home, understanding the role of a chimney swivel is crucial. A chimney swivel is a handy device that helps regulate the draft in your chimney, ensuring efficient airflow and proper ventilation for your fireplace or stove. By adjusting the position of the chimney swivel, you can control the intensity of the fire and the rate at which smoke is expelled. This not only improves the efficiency of your heating system but also reduces the risk of smoke backing up into your home. Whether you"re cozying up by the fire or keeping your house warm during the winter months, knowing how to use a chimney swivel can make a significant difference in your comfort and safety.

Tips for selecting a gate valve

It is important to keep in mind that choosing a slide damper correctly can have long-term effects on the safety of the heating system, which includes the chimney, in addition to the draught indicator. All models of fireplaces and stoves—aside from the most recent ones, which have a deflector—can have the baffle installed.

The following are the primary suggestions for selecting gate valves for smoke exhaust communication:

• If the heater functions by processing gas, it is better to buy a rotary model of the gate valve. This is due to the fact that such models exclude the possibility of complete closure of the chimney channel. In this way, the heating system will be safer. The chimney, which carries away the combustion products from the gas stove, must be closed off by at least 40 percent during operation;
• there are heating systems that function intermittently (intermittent). A closed damper installed in such a heating design tends to allow steam to pass through during the giveaway, while an open one promotes the formation of a lot of soot on the pipe that sits below the plate;
• It is strongly not recommended to use rotary elements for installation in sauna chimneys.

The best choice for a gas-consuming system is a rotary device.

Kindly take note! The chimney schieber is a shaped component of the chimney communication system, so if you purchase all the materials needed to lay the chimney, they will fit into a set of pipes. These valves can be ordered online from a website or bought from any specialty retailer.

Before making a gate product purchase, experts advise taking a precise measurement of the chimney channel’s cross-section. Probably the most important task to complete before buying a gate valve is this.

What is a gate valve in ventilation

Spherical ventilation gate

The German word "Schlieber" means "gate, flap, valve," which indicates its intended usage. By controlling air flows, the device is installed in ventilation systems to enhance their performance. Another name for it is the throttle valve (Drossel), which also captures the essence of its use. It translates to "narrowing device" from German.

A cast iron damper, which is used to modify and enhance the draft in the chimney pipe, is instantly recognizable to anyone who has seen a genuine "Russian" stove in the village. The damper is pulled out (opened) when the stove heats up; it is then partially pushed back in to keep heat from escaping when the stove’s temperature reaches the necessary level. Therefore, the gate valve serves as a draught regulator.

Of course, contemporary dampers for ventilation systems and chimneys differ in their designs and are composed of materials other than cast iron. They are separated based on where the damper is going to be installed:

• by shape: round, rectangular;
• by design: retractable, rotary;
• by the method of installation: in the socket without additional fixation, with the help of flanges;
• by type of control: manual, electric, hydraulic;
• by material of manufacture: stainless steel, chrome-plated, alloy steel.

Therefore, the ventilation gate valve is a metal gate valve that slides along guides to control the flow of air masses. Its thickness is 1 mm.

Features of gate valves

Typically, the gate construction’s body is made of metal, welded together into a single, monolithic piece that is either rectangular or cylindrical in shape.

Before you head to the store and begin using one of these gate valves, familiarize yourself with its unique features. For instance, only specific types of steel—CF8, CF8M, 904L, LC1, and WCB—are used to make the damper body. It is not possible to use other types, regardless of the manufacturer. It is uncommon to come across bodies composed of GGG40, a high-strength cast iron. The actual slide gate is constructed from 904L, CF8, and CF8M steel. A unique coating on this set of flaps is intended to enhance corrosion resistance and provide wear resistance.

Gate valves made of steel varieties not included in the above list should be avoided if you find them in the store. Their dependability and safety are far from satisfactory. The primary drawback of these gate valves is their poor quality tightness.

It is advisable to purchase the gate valve from authorized manufacturers in order to avoid the possibility of purchasing subpar products.

Which material is stronger

The materials used to make the various types of gates can vary in addition to their constructions. Metal is the only viable choice since it is the only substance that can withstand high temperatures without burning or deforming, and it maintains its properties over time even in harsh environments.

For production, stainless steel or cast iron are both utilized. Cast iron flaps require at least a forge to construct, so you cannot do it by yourself. Nonetheless, cast iron dampers with attractive and ugly designs are both available for purchase.

Butterfly valve made of cast iron with a handy handle. This design works with a rectangular-shaped brick chimney that can support the device’s weight in a sufficient amount.

Products made of steel have a more straightforward appearance, but they have similar qualities to those of cast iron. Steel devices have the benefit of being lightweight. The steel gate valve is appropriate for any chimney channel, be it brick and steel, rectangular or round, solid and lightweight, provided that the cast-iron slide damper for the stove chimney is installed solely on a solid, capital construction.

Slide damper samples made of galvanized steel with a 150 mm chimney cross-section diameter. Unlike regular steel, galvanized does not corrode or react to the effects of moisture (condensate).

It is important to consider the chimney’s characteristics as well as the interior features when selecting the material. For a country stove, a simple steel damper will do, but a cast-iron damper made to order is more appropriate for enhancing a Russian stove in a cottage.

Varieties

Apart from variations in design, there exist several other distinctions between the screens.

Shape

The shape of the duct’s cross-section determines the damper configuration, which can be either round or rectangular. The ducts with round cross sections have the highest throughput capacity; however, models in square and rectangular shapes are sometimes installed as a last resort. This is typically the case when there needs to be a minimum amount of open space behind a hypothetical wall or ceiling in order to conceal the duct pipes. Installation of rectangular pipes is also necessary for the operation of electric heaters with square cross sections. The damper has to precisely follow the shape of the duct, no matter what.

Control method

This feature allows for the division of gate valves into multiple types. There are variants with hydraulic, pneumatic, automatic, and manual controls. The decision is based on the owner’s preferences as well as the technical aspects of the ventilation system installation.

Material of manufacture

High-alloyed steel that has been galvanized or chrome-plated is used to make throttling and sliding dampers. Because of the material’s performance qualities, metal models have high strength, extended service life, and resistance to harsh environments. Due to the devices’ high temperature and vapor tolerance, there are no restrictions on how they can be installed in the ventilation systems of different kinds of buildings.

Method of installation

Gate valves can be installed using one of two techniques: socketed or flanged. In the first, mounting flanges are used, and in the second, sockets are used to insert the gate valve into the duct break.

Installation features

The ventilation gate valve is typically situated right in front of the fan outlet. When their positions align, the structure is referred to as a starting gate, and its function is to prevent the fan’s power unit from overheating.

It is important to realize that the fan should only be turned on when the damper is closed. If not, it will be impacted by additional load, which will eventually cause electrical equipment to fail.

Should you choose to manually install a damper in the ventilation system with a straight chimney, be aware that future maintenance and cleaning of this type of design will be quite challenging.

The gate valve has installation quirks of its own, just like any other construction. There are two primary methods for installing it:

• methodology pipe in pipe – the mechanism is installed in the chimney due to its design, such a principle does not imply the use of additional fasteners;
• The shut-off device is mounted before the exit from the chimney or in the stove, respectively, becoming part of the overall structure, in this case, the maximum height at which the gate valve can be located, can not exceed the mark of one meter.

Flange mounting is an additional damper mounting technique.

There are two things to keep in mind when using it. The fasteners that secure the smoke outlet must be placed at a minimal distance from the gate; mounting them alongside the main mechanism is not permitted. All fasteners must be placed solely on one side of the flange. Extra sealing is required during the flange-type connection mounting process.

• fasteners, which fix the smoke outlet, should be located at a small distance from the gate, it is not possible to install them together with the main mechanisms;
• all fasteners must be located exclusively on one side of the flange;
• In the process of installation of flange-type connections, it is necessary to provide additional sealing.

You can safeguard yourself against carbon monoxide poisoning by using a stove damper. Generation after generation has passed down knowledge about how to maintain the furnace’s warmth. It’s very easy: the damper doesn’t have to be fully closed as long as the flame is burning. The damper can be fully closed once the fire has been extinguished.

However, the damper can be easily made independently, just like any other mechanism, without the need for the availability of specialized tools. It suffices to have the bare minimum of theoretical knowledge and fundamental work skills to accomplish this.

Tips from specialists

Where to place the damper on the chimney

The damper can be positioned in relation to the chimney in one of three ways:

1. Placement in the firebox of a fireplace or stove;
2. Pipe-to-pipe installation;
3. Installation in the vent pipe.

Think about the first two choices:

• By placing the damper either in the furnace firebox or in the outlet pipe

In this instance, the damper is situated on an uninsulated portion of the pipe, no higher than 1 meter from the firebox. The damper can be easily adjusted with this setup.

Suitable for chimneys made of metal. Extra fasteners are not needed for this installation method. The gate valve must be installed precisely in accordance with the manufacturer’s instructions when buying a pre-built system.

How to adjust the draft

Using a damper to control the draught is quite simple. By shifting to provide more clearance, we increase the airflow to the fire, which intensifies the flame’s ignition. Cut the gap, and less thrust will be generated. Once the flame has completely extinguished, the damper is closed, allowing the heater to cool down much more quickly.

The most recent boiler models have automatic deflectors integrated into them. A draft control valve must be installed on all other heat-generating units.

Application

It is clear from the foregoing that gate valves come in a broad range of models and application areas. Range of application:

• Chemical industry.
• Oil and gas industry.
• Manufacturing of building materials.
• Utilities.
• Mining industry.
• Electricity and others.

Furthermore, the process pulverizes large particles, enabling the widest range of working masses to flow through such a wire. These gate valves are frequently seen in the chemical sector. If this system is chosen, the user should be aware that it is preferable to request installation from a reputable supplier. If not, there might be issues with usage. Everyone will be able to locate their own installation if needed and use it for the intended purpose because there are numerous varieties.

Something to keep in mind

The closing process’s total overlap is the most significant observation to make regarding this installation. The protection is fixed on both sides at the same distance when a parallel seal is chosen.

There are two possible positions for the gate valve: vertical and horizontal. The cover itself can be open or closed in any position.

Glands are used to stop the working mass from exiting the pipeline. They serve this exact purpose and are regarded as seals. Although this unit has a wide range of applications, experts feel that the gate valve flange gate valve does not always fully accomplish its job.

Make your purchase based on what will fit through the pipe before you buy. A variety of materials are available. If they are capable of displaying aggression, stainless steel is the better choice. Leakage occurs when flushing with ordinary water, which is a common issue. However, this is not a sign of inadequate sealing because it won’t occur when it comes into contact with denser materials.

Experts say that obstructing the flow of cement or any other bulk material on an industrial scale is a common application for this kind of unit. This is the usage strategy that is both typical and common. However, there are other objects that travel through these pipes that have this flap.

These days, GOST has a wealth of information about this gadget. Not only does such a mechanism stop the flow, it can also contain big particles. This expands the primary objective of the unit in question.

How to make a gate valve with your own hands

Think about creating both swivel and retractable chimney flap options. Every one of them has unique installation and manufacturing quirks. First, let’s discuss the retractable variety.

Preparation of materials and tools

The simplest model of retractable gate valve can be made with galvanized steel. It is lightweight, easily cleanable from soot due to its smooth surface, and the moving part is easily replaceable if needed.

Because millimeter steel deforms easily and makes it difficult to push the plate into the chimney, it is not a suitable material. The sheet must have a minimum thickness of 1.5 mm, ideally 2-2.5 mm.

The primary equipment includes a welding machine, electrodes, a file, a drill with a grinding disk, a bolt cutter, metal shears (which one to use depending on the thickness of the sheet), and a bolt cutter. Using a vise on a workbench is preferable. You’ll need a sheet of paper, a tape measure, and a marker, among other things.

Drawing up a diagram (drawing)

It is important to remove the dimensions carefully because even a few millimeters can lead to the chimney not working properly. Using a tape measure, measure the cross-section of the chimney channel to determine the frame’s dimensions.These measurements will match the inner side of the frame’s dimensions. Add 20–30 mm to each of the three sides of this value to determine the frame’s outer side.

Sketch of the flap using a metal framework. Fixing a wire frame on masonry is more challenging than installing a profile with wide, flat sides.

The latch needs to be somewhat narrower than the width of the frame (if the outer sides are taken into consideration) in order to slide out smoothly and effortlessly. Drawing out the structure’s layout and marking all potential dimensions is required to streamline calculations and serve as a guide when working with metal in the future.

For metal pipes, a perpendicular chimney fragment is typically combined with a flat damper design.

Dimensions for a rectangular pipe’s construction. The damper needs to completely enclose the chimney, but it also needs to have gaps or tiny drill holes for air to pass through.

For brick chimneys, all that’s needed is a wire or profile flat frame with a damper that moves along the guides, which are two parallel sides.

Marking and cutting out the parts

After establishing the precise measurements, cut the slider’s frame. In a sauna or summer kitchen, for instance, a small chimney can be bent into the shape of a U using a thick wire.

A strong angle profile is a more comprehensive frame. To create it, cut a strip of sheet steel, then bend it at a ninety-five degree angle lengthwise. One of the planes is cut where the corners are marked to give the profile the desired shape. The frame is obtained when bent. The bending points are welded.

Afterwards, we remove the damper itself. It ought to be between 5 and 10 mm narrower than the frame’s width. Modify the length so that, when the gate valve is closed, only a small portion of it faces outward. It can have a tucked edge or be shaped like a lug with a hole in it.

To make closing and opening the cut-out gate quieter and easier, use a disk to clean the edges. Painting the parts is not required.

Stages of installation of the damper

The factory-made gate valve’s installation steps are depicted in the photo. The homemade device is mounted using the same concept.

Picture gallery snapshot from

Step 1: choosing the installation location

Step 2: trim the bricks around the opening’s perimeter.

Planting the slide gate on the mortar is step three.

Brickwork above the gate valve is step four.

The damper’s installation height is primarily determined by the stove’s construction; home heating stoves have a higher damper than sauna stoves. Minimum height: between 0.9 and 1 m above the ground; maximum height: roughly 2 m.

A little bit about the functions of slide gate valves

Functional features of gate valves depend on their application:

• They can be used in piping systems, as a shut-off valve, then they will perform the role of limiting the movement of liquids or bulk objects. These gate valves are called flip gate valves.
• In ventilation systems, gate valves perform the functions of air flow regulation. By moving the gate valve back and forth, you can change the volume of air flow through the pipe by partially or completely blocking it off. Such gate valves are called regulating gate valves.
• In chimneys, as mentioned above, the gate valves are used as regulator dampers, allowing to close fully or partially the flue duct, which helps to avoid heat loss in the room.
• Smoke dampers have another role – draught control, in other words, they act as smoke control dampers. The system works according to the following principle: a large blocking of the cross-section of the chimney leads to less air flow, which reduces the draught. And vice versa: by opening the gate valve wide, it is possible to provide a greater air supply and increase the draft, and then the combustion in the furnace will be more intense and faster.

Actuator types

Different forces are needed to change the position of the regulating element depending on the size and purpose of the pipeline to which the gate valve is installed. The more challenging it is to open and close the gate valve, the larger the pipe capacity and the higher the density of the working medium.

Consequently, various control options are employed to modify the mechanism:

• Manually operated – by means of a handle, screw or lever – valves with a small internal diameter are operated on pipelines transporting low-density liquid and gaseous working media without hard particles.
• The electric actuator makes it possible to precisely regulate the flow capacity of the unit without the use of physical force. Electrically operated gate valves can be used on large pipelines and to regulate the flow of viscous and bulk solids. The only disadvantage of this mechanism is its energy dependence.
• The pneumatic actuator drives the stem and the locking mechanism by means of a compressed gas turbine, the operation of which resembles that of an ordinary pump. The strong point of pneumatic control is that the entire control mechanism from the stem to the pneumatic turbine is placed outside the valve body and does not come in contact with the working medium, which increases the service life of the device.

The most sophisticated and costly valves are those that operate pneumatically. It is mounted on pipelines that need to be adjusted remotely, but because of the way the control mechanism is made, manual adjustment is also an option if needed. This can be done with little physical effort because of the pneumatic turbine.

How to adjust the draught correctly

A crucial component of operating heating equipment is properly regulating the draft, as this process affects how efficiently the equipment operates and in certain situations, can even save your life. The truth is that the damper cannot completely prevent carbon monoxide from entering the room, not even when it is closed all the way.

The damper should be closed as soon as the furnace reaches the very end because the wood will already be completely burned and covered in ashes when the heater is off. If you stay in a room where carbon monoxide is seeping for an extended period of time, there is a serious risk that you will suffocate from the gas. It is impossible to see it as it seeps out and fills the entire space, so you should control the draught to prevent such a horrible scenario.

It is possible to determine the optimal value for the gate valve using a specific formula, which is used to control the draught and ensure that the heating equipment operates as efficiently as possible. The range of this "alpha" is 2.0–2.5. It is possible to guarantee optimal firewood combustion and little ash formation if this value is set.

Where and for what purpose the damper is installed

Where the damper is placed

Knowing where to place the damper is essential if it is to fulfill all the purposes that its attributes and features as a component of the heating system design allow it to do. It is impossible to ignore these data and recommendations in any situation since doing so could impair system functionality and increase the risk of a fire.

This component is typically installed on the chimney’s first meter because, in most circumstances, this part of the chimney is not insulated, preventing issues like thermal expansion.

It should be kept in mind that the damper needs to be mounted on the insulated portion of the chimney because the damper could jam because of the chimney’s natural expansion in response to temperature changes (thermal expansion).

What is the purpose of installing a damper?

In order to minimize fire risks and make efficient use of the heating equipment, chimney dampers or screens are installed. The element is one of the most crucial components in the heating system’s design because it actually makes it possible to accomplish the aforementioned objectives.

After the furnace, the damper closes the chimney and serves as a regulator. The ability of the damper to close the flue channel’s cross-section has an impact on how the draught, smoke gases, and air flows in the chimney are regulated. The damper needs to be closed when the chimney isn’t in use.

Advantages of gate valves

A multitude of pipeline valve manufacturers carry gate valves in their assortment. The most notable benefits of gate valves are enumerated here in the form of brief theses.

• Gate valves are characterized by short construction lengths, e.g. compared to cranes.
• The design of the gate valve is relatively simple, which on the one hand predetermines the ease of its installation (e.g., the possibility of replacement without cutting into the pipeline) and ease of operation, and on the other hand – reliability.
• Reliability indicators largely depend on the parameters of the working medium ─ its aggressiveness, temperature, concentration of mechanical impurities.
• Gate valves ─ the equipment is unpretentious and not capricious, their maintenance and repair do not require very high qualification of personnel.
• Gate valves from the best manufacturers that use quality components and modern materials in their manufacture have such important properties as durability, resistance to wear and tear and exposure to aggressive environments.
• The service life of slide gate valves can be measured in three or more decades, determined by the service life of the body. For other components it is shorter, but also very impressive. For example, for rubber products – not less than 5 years. The average service life between overhauls of the gate valve is the same amount.
• Absence of stagnant zones and self-cleaning ability allow not to think about slag and dirt.
• An important parameter ─ minimum hydraulic resistance of the medium. For example, ARMATEC gate valves have a hydraulic resistance coefficient of 0.3 or less when the blade is fully open.
• Gate valves have unique technical features, including fast action and high leak tightness. In t. ч. tightness of the highest class A according to GOST R 54808-2011. Pipe fittings. Standards of tightness of gates".

Gate valves are genuinely universal pipeline valves, in demand across a broad spectrum of technology, thanks to their technical specifications and extensive range of functional capabilities, which include a comprehensive range of sizes, pressures, and temperatures.

An essential part of a chimney system’s effective operation is a chimney swivel. It facilitates appropriate ventilation and smoke expulsion by acting as a connector between the stove or fireplace and the chimney flue. Its main goal is to give users flexibility and ease of maintenance so they can quickly clean and inspect their chimney system.

A chimney swivel makes it easy to disconnect the stove or fireplace from the chimney, which makes it easier to clean creosote buildup, remove debris, and perform routine inspections. This accessibility supports the heating system’s optimum performance and efficiency in addition to guaranteeing the chimney’s longevity and safety.

A chimney swivel’s ability to accommodate different stove and fireplace setups is one of its main advantages. A chimney swivel can be adjusted to fit various configurations, whether it’s a wood-burning stove, pellet stove, or traditional fireplace. This makes it a flexible option for homeowners with a range of heating requirements.

A chimney swivel can improve a home’s aesthetic appeal in addition to its practical qualities. Homeowners can select a chimney swivel that matches their interior decor while guaranteeing the effectiveness and safety of their heating system thanks to the sleek and contemporary designs that are currently on the market.

To sum up, a chimney swivel is essential to preserving the functionality, efficiency, and safety of a chimney system. It is a useful addition to any home heating setup because of its adaptability, low maintenance requirements, versatility, and attractive appearance. Homeowners can improve the functionality and lifespan of their chimney systems by making educated decisions by knowing what a chimney swivel is and how to use it.

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