These valves allow the flow to happen in one direction and prevent the current to reverse back. This is because they are automated and need to be required for opening and closing manually. Hence, they will continue to work throughout even if the outside of the system doesn’t have air, electricity and also without manual intervention to allow its functioning. They can be used for various mediums such as gases, fluids and they can be used in appliances that range from vacuum breakers, chemical feed pumps, loading racks, header lines, boilers, injection lines, etc. There is an immense utility of these check valves .

How extra parts make a difference

They rely on the line fluid for the opening and closing of the flow to happen. The usual body parts of the valve are there, but sometimes extra elements are added as part of the design such as

• Stem
• Hinge pin
• Disc arm
• Spring
• Ball
• Elastomers
• Bearings

The mechanical force doesn’t come into play, and the fluid back pressure helps …