Help on Tele2, tariffs, questions

Stop valve brass – reliable look shut-off valves. This valve is used in pipelines and allows you to shut off 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: body - brass LTs40Sd; seal - fluoroplastic
Wednesday: air, water, steam, etc.
Media pressure: 16 bar
Ambient temperature: 0...+200°

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

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

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

Purpose and features

Brass shut-off valves are extremely wide application. They can be used to complete pipelines different types, including:

• hot and cold water supply pipelines in buildings;
• heating system pipelines;
• fire pipelines;
• various utility pipelines for supplying water outside buildings and structures.

The main function of valves is to shut off the flow of water. At the same time, they can provide complete or partial flow blocking, which allows most devices of this type to perform both shut-off and regulating functions. They can be installed at water intake points, as well as in sections of pipelines 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 shut-off device. In addition, brass is resistant to corrosion, which allows for maximum durability, even when used in harsh conditions.

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

Brass valves on sale

The Santekhkomplekt company sells brass shut-off valves in Moscow for assembling pipelines for various purposes. In our store you will find a wide selection of valves different types and different standard 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 supply high-quality shut-off valves in any batches. Wherein we support as much as possible favorable prices for the entire range offered.

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

Operating principle of check valves

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

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

Regardless of the type, all check valves operate according to to the following principle. The flow of water entering such a device under a certain pressure acts on the locking element, pressing the spring and opening it. If the pressure of the water flow decreases or it begins to move in the wrong direction, the spring returns the locking element to its original place, preventing 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 borehole, 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 prevent the pressure of the water flow from decreasing when users open the 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 modern market offered big variety check valves, which differ from each other both in design and technical characteristics, and the material of manufacture.

Based on the type of locking element, the following types of devices are distinguished.

The locking element of such valves is a spool, which moves freely along the vertical axis. The lifting of the spool (and, accordingly, the opening of the valve) occurs under the pressure of the liquid flow, and closure in the event of a decrease in the flow pressure occurs under the influence of the own weight of the spool, which at such a moment simply lowers to its seat. The big disadvantage of such check valves is that they can only be installed on vertical sections of pipelines.

The locking element of these valves is a spring-loaded ball. When the required pressure of the liquid entering the valve is reached, the spring is pressed out 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 begins to move in the wrong direction, the spring returns the ball to its seat.

Ball check valve device

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

These valves use two spring-loaded flaps as a locking element. Thanks to their design features, double-leaf check valves are compact in size and light in weight.

Installation methods

Check valves also differ in the method of installation in pipelines. So, depending on this parameter, the following are distinguished:

• flanged valves, which are installed on a pipeline (mostly of large 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 installed on domestic pipelines);
• valves installed by welding.

Clutch-type spring check valves

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

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

• Brass spring check valve. 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 pipeline systems. The brass check valve practically does not require regular maintenance and can be used for installation on any type of pipe.
• Check valves whose body is made of cast iron. Cast iron is prone to corrosion and deposits, which significantly 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 coupling valves are the most reliable, but also the most expensive. They are not subject to corrosion, and on them inner surface no deposits accumulate.
• 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 polymer materials.

To equip household pipelines, a brass coupling valve is usually chosen, which, while highly reliable, is also affordable when compared with models of similar devices made of stainless steel.

Sleeve-type check valves in domestic piping systems are usually installed after water meters, which prevents such devices from rotating in the opposite 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 coupling check valve is designed in such a way that it can be disassembled into two halves. This may be required during its maintenance.

Valves for submersible pumps

Check valves are required for equipment pumping equipment, with the help of which water is pumped out from underground sources. The use of check valves makes it possible to protect such systems from the reverse outflow of water, as well as to facilitate the process of starting pumping equipment after it has been stopped. The installation location, as well as the type of valve devices in such cases, are chosen depending on what kind of 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.

If vacuum pumping equipment is used to pump water from a well or well, a check valve is installed in front of the hydraulic accumulator. Check valves of the ball and spool type are optimally suited for this purpose. If 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 hydraulic 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 are mounted mainly on the suction pipe. If you install a check valve directly in front of pumping station, you may encounter that the pressure of the water flow will be weaker than when installing such a device on the suction line.

In the event that it is used for pumping water vibration pump, the check valve is best installed in front of the receiver. When choosing a place to install a check valve, you should take into account the fact that such a device must be regularly maintained, so direct access to it must be provided.

To prevent the reverse flow of the working medium, shut-off valves are installed in pipeline systems, which control movement in only one direction. Brass check valves are installed in water-bearing and heating pipelines. They protect 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

Shut-off valves made of brass, blocking the reverse flow of the working medium, are different:

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

Selection of Brass Check Valves

Brass shut-off valves used to block reverse flow are selected:

• at the installation site;
• type and direction of the pipeline;
• connection diameter and operating pressure parameters.

Wafer check valves made of brass with a disk outflow blocker are installed in main pipelines of medium diameter. Products with a rotary or gate locking principle are used in water supply systems and drainage systems. Squeeze brass valves are installed in heating systems, autonomous cold and hot water supply.

Characteristics of brass valves

Shut-off valves made of brass, blocking the reverse flow of the working medium, are characterized by:

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

Product Features

Brass fittings withstand moderate high temperatures and interaction with low- and moderately aggressive chemical compounds. It is allowed to install products on outdoors and with immersion in water. Chrome plating gives the valves additional resistance to body oxidation.

Application of check valves made of brass

Brass fittings used to block backflow are used in autonomous systems home and commercial heating. Check valves are installed in front of the pump when drawing water from a well. The products are used in water-bearing communications in vertical and horizontal sections.

Installation and installation

There are universal check valves made of brass that can be installed on horizontal, vertical and inclined feed. Models with push-out locking are installed in horizontal areas. On the housings of all products there is an arrow indicating the direction of the operating current.

brass shut-off valves

In the picture below:

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

shut-off valves

Description of brass valves

A valve used to be called a type of valve, where an element for adjusting the flow of a medium (strengthening or weakening) or blocking its movement moves along (parallel) the flowing medium, which is affected by the valve in order to weaken the speed of its movement until it stops completely (blocking).

In 1981, when GOST 24856-81 “Industrial Pipeline Valves” was issued, it was decided to call the above devices valves, and the word valve was excluded from the lexicon pipeline fittings. GOST R 52720-2007 “Pipeline fittings. Terms and Definitions” again characterized the name valve as unacceptable. However, if in strict technical literature 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 shut-off valves, are devices that block the flow of liquid or gaseous media. They are used more often in pipelines with a pressure of up to 15-100 millimeters and a working pressure of up to 25 atm. The temperature of the medium transmitted through the pipeline can be from -100 to +250 degrees Celsius. The main material is brass valves and cast iron valves. Products differ in design and purpose. In the first case, these are mainly direct-flow, angle, mixing, and straight-through valves. In the second - shut-off and regulating, there are also special ones.

In the picture below:

1. spindle.
2. yoke 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 occupy a worthy place shut-off valves, or as they are also called, shut-off and control valves. Such devices have enough simple design, which is why they behave very reliably in operation. The main purpose of the shut-off valve, as already mentioned, is to shut off the flow 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 shutter during operation coincides with the movement of the medium flow through the pipeline, while for gate valves it is perpendicular.

Advantages of brass valves

• a small shutter stroke when the valve is fully open, 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 seal tightness in valves compared to gate valves. This is achieved by introducing sealing rings made of various kinds non-metals;
• 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 wear on the sealing surfaces.

Flaws

• Compared to gate valves or ball valves, the hydraulic resistance of such structures is higher. How larger value 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 the accumulation in stagnant zones of their design of various mechanical inclusions, which are always present in the transmitted medium. This leads to earlier wear of the valve material in such places and, as a consequence, its failure.