Diaphragm valves

A diaphragm valve is a shut–off and regulating mechanism of a pipeline for controlling the flow of liquid, steam, and gas. The external seal of the valve is provided by an elastic membrane. The central part of the floppy disk moves to open or close the gap. The elastic partition is made of rubber, fluoroplast, and other polymeric materials. The Salutech company offers to buy a diaphragm valve in Moscow, on favorable terms.

Purpose and types of diaphragm valves

Control valves are used in pipelines with working media containing large amounts of solid particles. The stretchable and compressible membrane has the shape of a dome or disk. Due to the design features of the regulating diaphragm valves, plaque from the infiltrate does not settle on the inner surface of the valve.

Manufacturers produce corner and pass-through products from:

• Cast iron;
• Become;
• Bronze;
• Other materials.

Saddles, rods and valves are sealed with Teflon, rubber, cotton, graphite. Diaphragm valves have flanged or coupling connections for attachment to pipes.

The working pressure is 0-10 bar. The temperature range varies from -10 to +180 degrees. The devices are controlled manually, pneumatically, electromagnetically, hydraulically or via controllers. When fully closed, the shut-off force must exceed the flow pressure.

The principle of operation of diaphragm type valves

The membrane is located between the housing and the cover of the shut-off valve device. If adjustment is necessary, the elastic partition is bent by a rod or spindle. As a result, the working cavity of the pressure diaphragm valve, the flow section, is partially or completely blocked. Flexible walls ensure complete tightness of the gate, no leaks.

Advantages of diaphragm valves

This type of valve is characterized by fast actuation, low drive force, and high hydraulic resistance. The shape of the channel of the regulating diaphragm valve, unlike the hose mechanisms, remains unchanged. On the other hand, the scope of application is limited by the technical characteristics of elastic materials. In addition, regular monitoring of the condition of the partitions is necessary.

Applications of diaphragm valves

Universal fittings are used to regulate aggressive media. Lined diaphragm valve is the optimal choice for engineering networks of chemical water treatment in the electric power industry, thermal power industry.

In the factories of the food and pharmaceutical industries, control valves with a diaphragm mechanism are used because of the compliance of their performance characteristics with strict sanitary and hygienic requirements.

In heat and water supply, diaphragm safety valves automatically close the pipes. This is necessary if the filter, burner or tank is below the minimum filling level.

In sewer networks, membrane vacuum valves regulate the pumping and atmospheric discharge sequences. To maintain the pressure in the branch lines at a lower level compared to the main line, reduction modules are installed.

Buy valves with diaphragm drive in Salutech

To order shut-off valves, add the product to the cart or send a price request via the website. The company is an official distributor of leading Russian and foreign manufacturers. The consultant will answer questions about the prices of diaphragm valves, help you choose the best models, and make a purchase. The service department performs warranty and post-warranty maintenance of the equipment. It is possible to send an order across Russia by mail or by a transport company. Please contact us, every customer is important to us!