Explore the benefits of check valves

Posted by HelenaNelson on May 28th, 2018

A check valve is a valve that allows fluid to pass in only one direction. It has two openings, one for fluid to enter and other for fluid to exit. Though there are different types of check valves, it is a very simple and inexpensive item. They do not require any external control, they work automatically. One of the best examples of check valves is heart valves, which are inlet-outlet valves for the heart ventricles.

• Cracking pressure is the minimum pressure at which the valve operates
• Cracking pressure is also known as Unsealing head(pressure)
• The pressure at which no flow is seen is called as reseal pressure or sealing pressure or stealing head.
• The difference of pressures between the inlet pressure and the outlet pressure is called as the back pressure.

Check valve manufacturers, manufacture check valves in various types, such as

• A check valve in which the movable part, to block the flow is a ball, is known as the ball check valve.
• A check valve which uses flexing rubber, as a diaphragm to create a normally-closed valve is called as a diaphragm check valve.
• A swing check valve is also known as tilting disc check valve. In this the movable part to block the flow, swings on a hinge.
• The flush mechanism in our toilet is an example of the flapper valve. Clapper valve is another variant of this mechanism.
• A valve with over-ride control to stop flow regardless of flow or pressure is called as a stop check valve.
• A lift check valve also called as a lift is lifted by high pressure or upstream fluid, to all the fluid to outlet or downstream side.
• When the flow goes through soft tubes, it is called as a duck-bill valve.
• The pneumatic non-return valve is also one of the variants.

There are check valve suppliers, who can supply check valves, according to you and your industrial needs.

Salient Features:

• They have stream-lined contours, to make sure that the pressure drop is minimal.
• Better pressure tightness is ensured by flat face of valve and seat lapped on flat surface lapping machine.
• The construction of a check valve is very rugged and very sturdy.

Check valves can be compared to doors, where the door opens them while coming in, and close while leaving. But it fails, if it constantly opened and closed. The supporting parts are gentle, so should not use more. The longest trouble-free service will come from the valves suited for the application, not the line size. Wear is the result of two components rubbing against each other and the main cause for any equipment failure.