Check valve.

A reliable flanged check valve becomes the basis for stable operation of water supply and heating systems on an industrial and domestic scale. The main goal is to prevent the risk of reverse movement of the working environment. A wide range and assortment allow you to choose a suitable check valve for the specifics of the project - threaded, flanged products to protect against the risk of back pressure or water hammer.

The main purpose that the shut-off valve performs is uninterrupted operation in heating systems, water supply (cold, hot, steam), chemical liquids.

The main advantages of the valves are:

• Trouble-free operation;
• Automatic operation without additional energy loss;
• Stability of operation, including extreme operating conditions;
• Minimal impact on pipeline capacity;
• Support for opening the shutter at a minimum pressure of 0.5 bar.

Differences between flanged valves and threaded valves:

• The most rigid, durable connection among all types of check valves. The result is achieved due to the flange connection instead of the threaded one, and the solidity of the housing itself;
• It is easier to organize a flange than to make a thread. It is also necessary to take into account the manufacturability of the housing production - the injection molding method;
• High rates of tightness and reliability of the structure;
• Absolute autonomy - without the need to connect an additional energy source. It functions by means of the pressure of the working medium;
• High level of maintainability;
• Easy to install;
• The work is silent.

Due to its design, the check valve passes the working medium in only one direction. The fastening is made by means of a flange connection. In the closed position, the valve opens under the influence of the internal environment – in case of a decrease in pressure in the system, a spring is triggered, with automatic closing of the device.

The spring ensures absolute tightness, so it is possible to use the valve horizontally and vertically.

The valve design uses a housing and a valve (spool) that opens only in one direction - completely eliminating the risk of backflow of the working medium, for example, a check valve for water (not drinking) Ball check valve VD.

Design:

• Rotary flanged check valve - with a gate in the form of a plate. Its task is to open and block the flow of the working medium by lifting or lowering over the saddle;
• Lifting valve - made with a shutter that moves vertically;
• Spring-loaded. The shutter sits on the saddle to stop the supply of the working medium in the main direction;
• Ball valve. The check valve for the sewer is a spherical gate that "sits" in the saddle when the pressure decreases.

Valve connection method:

• Flanged;
• Threaded.

The places for the installation of equipment are prescribed by the regulations, according to the specifics of the technological process. In engineering systems, pipe fittings are required for:

• Pressure line of each pump connected in parallel;
• Pipeline – after each water meter;
• Jumpers located between the supply and return pipelines, with connection according to a dependent scheme with mixing of the carrier.

The installation of conventional flow valves is allowed only horizontally. Horizontal and vertical mounting is possible for ball return models.

Installation of flanged check valves is carried out in flanged pipe breaks - horizontal and vertical installation is allowed. A flat disk acts as a shutter.

The flanged check valve becomes a justified investment in the reliability of shut-off valves, the stability of the functioning of heating and water supply systems. But to be sure of such a result, it is important to take a responsible attitude to the study of the match - with a comparison of the characteristics and operating conditions, taking into account their tasks and the specifics of the project. Or use the advice of specialists who are interested in the optimal choice for the sake of the trust of each buyer.