The valves are brass. Brass check valve Brass valve

brass stop valves

In the picture below:

1. spindle.
2. rope knot.
3. spool.
4. frame.

shut-off valves (gates)

Description of brass fittings

A valve used to be a type of valve, where the element for regulating the flow of a medium (increasing or weakening) or locking its movement moves along (in parallel) the flowing medium, which is affected by the valve in order to reduce the speed of its movement up to its complete cessation (locking).

In 1981, when GOST 24856-81 “Industrial pipeline fittings” was released, it was decided to call the above devices valves, and the word valve was excluded from the lexicon. pipe fittings. GOST R 52720-2007 “Pipeline fittings. Terms and definitions" again characterized the name of the valve as unacceptable. Nevertheless, if in strict technical literature the authors try not to use this word, then in the speech of people associated with plumbing, it can be heard as often as the word valve. We will not neglect this term either.

In a broad sense, valves, and as a subspecies brass stop valves, are devices that block the flow of liquid or gaseous media. They are used more often in pipelines with remote control up to 15-100 millimeters with a working pressure up to 25 atm. The temperature of the medium transferred through the pipeline can be from -100 to +250 degrees Celsius. The main material is brass valves (valves) and cast iron valves (valves). Products differ in design and purpose. In the first case, these are mainly direct-flow, angle, mixing, and through valves. In the second - locking and regulating, there are also special ones.

In the picture below:

1. spindle.
2. rope knot.
3. spool.
4. frame.

According to the above standards, there are the following types of fittings: gate valves, valves (gates), taps and gates. Among them, a worthy place is occupied by shut-off valves (gates), or as they are also called, locking and regulating. Such devices have enough simple design which makes them very reliable in operation. The main purpose of the shut-off valve, as already mentioned, is to shut off the supply of the working medium through the pipeline.

The operation of shut-off valves is similar to the operation of gate valves, the difference, and it is fundamental, is that the movement of the valve gate during operation coincides with the movement of the medium flow through the pipeline, while for gate valves it is perpendicular.

Advantages of brass valves

• small shutter travel full opening valve, most often it is a quarter of the nominal diameter. For valves, this stroke is usually larger than the diameter. And this small stroke leads to a decrease in the size of the valve in height and a decrease in its mass;

Flaws

• It is much easier to ensure the tightness of the shutter in valves compared to gate valves. This is achieved by introducing sealing rings made of various non-metals into the design of the valve;
• the process of opening and closing the valve occurs practically without friction of the seal, which any valve has, on the seat. And this significantly reduces the wear of the sealing surfaces.

Flaws

• compared to gate valves or ball valves, the hydraulic resistance of such structures is higher. The greater the passage of liquid through the valve and the higher the speed of the medium transmitted through the pipeline, the greater the energy losses in the pipeline, and this leads to the need to increase the initial pressure at its inlet;
• valves (gates) are more prone to accumulation in the stagnant zones of their design of various mechanical inclusions that are always present in the transmitted medium. This leads to earlier wear in such places of the valve material and, as a result, its failure.

To equip pipelines for various purposes, a variety of types of shut-off and control valves are used. One of the most common types of valves are brass taps, or valves. Our company can offer a wide range of brass stopcocks in Moscow on the most favorable terms.

Purpose and features

Brass shut-off valves are extremely wide application. They can be used for piping different type, including:

• pipelines of hot and cold water supply in buildings;
• pipelines of heating systems;
• fire pipelines;
• various household pipelines for supplying water outside buildings and structures.

The main function of the valves is to block the flow of water. At the same time, they can provide complete or partial blockage of the flow, which allows most devices of this type to perform both a shut-off and a regulating function. They can be installed at water intake points, as well as in pipeline sections where it is necessary to ensure regulation or complete blocking of the flow.

The use of brass for the manufacture of valves for pipelines allows for convenient and efficient operation due to the easy movement and tight fit of the sealing surfaces of the locking device. In addition, brass resists corrosion for maximum durability, even in harsh environments.

Today, a wide range of brass coupling type shut-off valves is produced. This allows them to be installed on pipelines of various diameters and purposes. Both direct-flow and angle valves are widely used.

Brass valves on sale

The Santekhkomplekt company sells brass shut-off valves in Moscow for the assembly of pipelines for various purposes. In our store you will find a wide selection of valves different kind and different sizes.

All products are supplied only from leading manufacturers and are certified in Russia. Thanks to this, we can guarantee a long and efficient service life of the supplied valves while maintaining their full functionality.

Our company will be able to ensure the supply of high-quality shut-off valves in any batch. Wherein We maintain the most favorable prices for the entire range offered.

To prevent the reverse flow of the working medium in pipeline systems, stop valves are installed, which sets the movement in only one direction. Brass check valves are installed in water-bearing and heating pipelines. They protect the equipment from unintended fluid movement and block water hammer associated with a decrease in pressure and the formation of reverse current.

Types of Brass Check Valves

Stop valves made of brass, blocking the reverse flow of the working medium, are different:

• by connection type;
• product dimensions and connection diameters;
• the shape of the case and the design of the reverse current blocker;
• the presence of an outer coating of chromium or polymers on the body.

Selection of check valves made of brass

Brass shut-off valves used for backflow blocking are selected:

• at the place of installation;
• type and direction of the pipeline;
• connection diameter and working pressure parameters.

Brass wafer type check valves with disc outflow blocking are installed in the main pipelines of medium diameter. Products with a rotary or gate blocking principle are used in water supply systems and drainage systems. Squeeze brass valves are placed in heating systems, autonomous cold and hot water supply.

Characteristics of brass valves

Stop valves made of brass, blocking the reverse flow of the working medium, are characterized by:

• temperature and pressure parameters of the working medium;
• connection diameter and connection type;
• installation method (vertical, horizontal).

Product features

Brass fittings withstand moderately high temperatures and interaction with low- and medium-aggressive chemical compounds. Installation of products in the open air and with immersion in water is allowed. The chrome plating gives the valves additional resistance to body oxidation.

The use of check valves made of brass

Brass fittings used to block backflow are used in autonomous systems domestic and commercial heating. Check valves are installed in front of the pump when water is taken from the well. Products are used in water-bearing communications in vertical and horizontal sections.

Installation and assembly

There are universal check valves made of brass that can be installed in horizontal, vertical and inclined flow. Push-lock models are installed on horizontal sections. On the cases of all products there is an arrow indicating the direction of the operating current.

In order for the plumbing system to function correctly and efficiently, it is not enough just to connect the pipes, it is also necessary to equip it with additional elements, one of which is a coupling check valve or any other type. The presence of such an element in the plumbing system allows you to protect it from such undesirable phenomena as counterflow and water hammer. Check valves, which, according to the method of installation, can be coupling, flanged or wafer type, are mounted both on separate sections of pipeline systems, and at pumping stations.

The principle of operation of check valves

In the design of any check valve, two main elements can be distinguished:

• housing, for the manufacture of which can be used various metals;
• locking element, the position of which in the closed state is provided by a special spring.

Regardless of the type, all check valves work according to the following principle. The flow of water entering such a device under a certain pressure acts on the locking element, depressing the spring and opening it. If the pressure of the water flow decreases or it starts to move in the wrong direction, the spring returns the locking element to its original place, preventing the liquid from passing through the valve.

In cases where check valves are used to equip a pump with which water is pumped out of a well or well, the purpose of such devices is also to prevent the liquid from returning back to the water supply when the pump is not working. When installed on water supply pipelines, such valves do not allow the pressure of the water flow to decrease when users open taps in one or more sections of the system. In addition, as mentioned above, the use of check valves allows you to protect pipelines from the effects of water hammer.

Types of check valves

On the modern market a wide variety of non-return valves are offered, which differ from each other both in design and technical specifications, as well as the material of manufacture.

According to the type of locking element, devices of the following types are distinguished.

The locking element of such gates is a spool, freely moving along the vertical axis. The spool rises (and, accordingly, the valve opens) under the pressure of the fluid flow, and closing in the event of a decrease in flow pressure occurs under the influence of the own weight of the spool, which at such a moment simply falls on its own seat. Big disadvantage such check valves is that they can only be installed on vertical sections pipelines.

The locking element of these valves is a spring-loaded ball. When the required pressure of the fluid entering the valve is reached, the spring is released and the ball opens the passage hole, allowing the water to move freely in the desired direction. Accordingly, when the fluid pressure drops or it starts to move in the wrong direction, the spring returns the ball to its seat.

Ball check valve device

The locking element of these valves is a metal plate - a leaf, located on a spring-loaded axis. The most significant disadvantage of such closures is that when closing their locking element, significant shock loads are created. This negatively affects the technical condition of the valve device itself and can lead to such an undesirable phenomenon as water hammer.

In these gates, two spring-loaded flaps are used as a locking element at once. Double-leaf check valves due to the design features are characterized by compact dimensions and low weight.

Mounting methods

Check valves also differ in the ways of installation in pipelines. So, depending on this parameter, there are:

• flanged valves that are installed on the pipeline (mainly of a significant diameter) using flanges welded to their body;
• wafer check valves, which are mounted between two flanges fixed on a selected section of the pipeline;
• coupling-type check valves installed using threaded couplings (it is coupling valves that are most often mounted on domestic pipelines);
• valves installed by welding.

Coupling type spring check valves

For installation in domestic pipelines, as mentioned above, mainly check valves of the coupling type are used. Mandatory parts of coupling valves (as well as other valve devices) are a locking element and a spring that holds it in the desired position.

Depending on the material of manufacture, coupling-type check valves may belong to devices of one of the following categories.

• Check valve spring brass. For the manufacture of such check valves, brass is used - a material that does not corrode. These are the most popular coupling devices used for installation in domestic piping systems. The check valve brass practically does not need regular service and can be used for installation on pipes of any type.
• Check valves, the body of which is made of cast iron. Cast iron is prone to corrosion and deposits, which greatly limits the use of such devices. Sleeve check valves made of cast iron are usually installed on pipelines with a significant diameter.
• Check valves, parts of which are made of stainless steel. Such sleeve valves are the most reliable, but also the most expensive. They are not subject to corrosion, and deposits do not accumulate on their inner surface.
• check valves made of combined materials, which can be brass and stainless steel. The shut-off elements of such coupling valves are usually made of polymeric materials.

To equip domestic pipelines, a brass coupling valve is usually chosen, which, with high reliability, is distinguished by its affordable cost when compared with models of similar devices made of stainless steel.

Socket-type check valves in domestic piping systems are usually installed after water meters, which prevents such devices from rotating in reverse direction. In addition, the installation of coupling valve devices in certain sections of the pipeline makes it possible to protect such sections from emptying at the moment when water is drained from the system or the pump that supplies it stops.

The design of the spring coupled check valve is designed in such a way that it can be disassembled into two halves. This may be required during maintenance.

Valves for submersible pumps

Check valves are required to equip pumping equipment, with which water is pumped out from underground sources. The use of check valves allows you to protect such systems from the backflow of water, as well as to facilitate the process of starting pumping equipment after it has stopped. The installation site, as well as the type of valve devices in such cases, is chosen depending on which pumping equipment needs to be equipped with them.

Models of modern pumping units are already equipped with check valves that are installed on the inlet and outlet lines of such equipment. When purchasing such pumps, it is not necessary to additionally equip them with check valves.

In the event that vacuum pumping equipment is used to pump water from a well or well, check valve installed in front of the accumulator. For this, check valves of the ball and spool type are optimally suited. If the vacuum pump is installed on the surface of the earth, outside the source of water supply, then two check valves are used at once, one of which is installed at the end of the hose supplying water from the well, and the second in front of the accumulator. In most cases, manufacturers of pumping equipment indicate in the instructions which check valves can be used with it.

When equipping pumping stations, check valves are installed after the ratchet and mounted mainly on the suction pipe. If you install a non-return valve just before pumping station, you may encounter the fact that the pressure of the water flow will be weaker than when installing such a device on the suction line.

In the event that for pumping water is used vibration pump, a non-return valve is best installed before the receiver. When choosing a place to mount a check valve, one should take into account the fact that such a device must be regularly serviced, so direct access to it must be provided.

Shut-off valve brass - a reliable type of shut-off valves. Such a valve is used in pipelines and allows you to block the flow of water if necessary. The water supply is limited due to the special design of the valve: the locking element moves parallel to the direction of the water flow (or other working medium).

Material: case - brass LTs40Sd; seal - fluoroplastic
Wednesday: air, water, steam, etc.
Media pressure: 16 bar
Medium temperature: 0...+200°

Material:
Wednesday: water etc.
Media pressure: 16 bar
Medium temperature: 0...+70°

Material: case - brass LTs40Sd; seal - rubber
Wednesday: water
Media pressure: 10 bar
Medium temperature: 0...+50°