Check Valves

We offers a broad line of adjustable and fixed cracking pressure check valves to control back flow in general-service and high-purity applications.

Check valves:

• Are designed to allow fluids to flow in one direction only
• Are rated for use in medium- and high-pressure applications

Operation:

• The main mission of a Check Valve is to avoid back pressure in the process (avoid that the flow is switching direction)
• A Check Valve can also be used for isolation purpose.
• There will normally be regulations telling how many and in which location Check Valves are to be installed in the process.

Design:

• As for most valves there are a lot of different designs of Check Valves. The basic design is a Duo Check Valve with two discs mounted on an hinge pin in the center of the Check Valve. The Check Valve has a standby closed position with springs pushing the discs towards the seats. These valves are designed for installation on a horizontal line where the hinge pin is placed in a vertical position.
• To reduce space and weight these Check Valves are often delivered as wafer valves.