Check valve symbol on PIDs. The arrow shows the flow direction. A check valve, clack valve, non-return valve , reflux valve, retention valve or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.
Bufret Oversett denne siden Also visit our Valve Terminology pages for alphabetic listing and descriptions of words and phrasing within the Valve Business . Non-return valve (flap), angle, screw down. In the symbol shown flow is allowed from the top to the bottom but only when the pressure is .
This is not a good choice for stopping and holding a cylinder as the symbol seems to indicate. To positively stop a cylinder, use a valve with the cylinder ports hooked to tank, and pilot -operated check valves in the cylinder line or lines. Piping Symbol Legend circulator. Proportional directional control valve. Electro-hydraulic servo valve.
Hydraulic symbols are commonly used to depict hydraulic circuits. The pilot line is used to open the check valve and let the flow back through . Unsubscribe from Nephew Nabile.