Check valves
Check valves belong to the category of protective pipeline fittings designed to block the working environment when a reverse flow occurs. That is, the shut-off device blocks the flow of liquid or gas when it begins to move in the other direction.
Scope of use
The scope of application of the check valve is wide. It is installed on pipelines through which water, gas, oil products, chemical liquids circulate. Often such shut-off valves can be found on household pipelines.
It is installed:
- In sewerage and water supply systems;
- After the meters to protect against water hammer;
- At the heater inlet (gas or electric);
- Before the pumping equipment (on the pressure line);
- At the heating station (between the return and supply pipes).

Check valves can be installed both horizontally and vertically. In complex pipelines, check valves are mounted at a certain distance. This will prevent an emergency situation. This happens as follows: the valve closes at a certain section and stops the reverse flow.
Operating principle
The design of the check valve is extremely simple. It consists of a body (made of steel or cast iron) and a spring with adjustable stiffness. The shut-off element ensures opening only in the “correct” direction – in the natural direction of movement of the working medium. By acting on the spring held by the “flap”, the transported working medium opens it and begins to move in the desired direction. When the pressure drops, the shut-off element “slams” and does not allow water or gas to move in the opposite direction. Depending on the design features of the shut-off component, valves are divided into:
- Rotary;
- Lifting;
- Ball;
- Bivalve;
- Receiving mesh.
The choice of one or another option is determined by a specialist. In this case, you will be fully insured against errors and subsequent failures in operation. Interflange valves differ from flanged ones in that the former do not have fasteners. Shut-off valves are mounted between flanges located at the end point of the pipes being connected. Tightening occurs due to special pins.
Check valves and their advantages
Our catalog provides check wafer valves. The advantages of the offered products include:
- Compactness;
- Reliability;
- Automatic on/off;
- Ability to work in emergency situations;
- Working with different working environments;
- Mounting in any position;
- Structural simplicity;
- Maintainability;
- No maintenance required.
You can buy check valves interflange types from us DN 40, DN 50, DN 65, DN 65, DN 80, DN 100, DN 125, DN 150. If you do not know which valves will be optimal for you, contact us! We will help in valves, interflange filters, etc.
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