What are check valves

Check valves, also known as non-return valves, are a type of valve that allows fluid or gas to flow in only one direction. These valves are designed to prevent backflow, which occurs when fluid or gas flows back in the opposite direction to its intended flow. 

There are several types of check valves available for various applications. Some of the most common types of check valves include:

Swing Check Valve: This type of check valve has a disc that swings open to allow flow in one direction and swings closed to prevent backflow.

Ball Check Valve: This type of check valve has a ball that sits in a seat, allowing flow in one direction and preventing backflow when the pressure of the fluid or gas closes the ball against the seat.

Piston Check Valve: This type of check valve has a piston that moves up and down to allow flow in one direction and prevent backflow when the fluid or gas pushes the piston closed.

Diaphragm Check Valve: This type of check valve has a flexible diaphragm that moves up and down to allow flow in one direction and prevent backflow when the pressure of the fluid or gas closes the diaphragm against a seat.

Check valves offer several advantages for various applications, including:

Prevents Backflow: Check valves to prevent backflow, which can cause damage to equipment and compromise the safety of personnel.

Low Maintenance: Check valves are relatively low maintenance, with no external power source required to operate.

Easy to Install: Check valves are easy to install and do not require complex piping or installation procedures.