Contributors in Industrial valves
Industrial valves > Control valves 
fail-closed
Industrial valves; Control valves
Or normally closed. Another way of describing an air-to-open actuator. Approximately 80% of all spring return diaphragm operators in the field are of this construction.
fail-open
Industrial valves; Control valves
Or normally open. Another way of describing an air-to-close actuator.
needle valve
Industrial valves; Control valves
A type of valve having a small orifice and a threaded, needle-like plunger. It allows precise regulation of flow, although it is generally used for, and is capable of, only ...
relief valve
Industrial valves; Control valves
A type of valve used to control or limit the pressure in a system or vessel which can build up by a process upset, instrument or equipment failure, or fire.
Sub-categories
- Control valves (3490)