- Domeniu: Industrial valves
- Number of terms: 3113
- Number of blossaries: 0
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Another name for a globe valve. It refers to the linear or straight-line movement of the plug and stem.
Industry:Industrial valves
Flow of fluid in the opposite direction from that normally considered the standard direction. Some rotary valves are considered to be bi-directional although working pressure drop capabilities may be lower and leakage rates may be higher in reverse flow.
Industry:Industrial valves
An increase in air pressure to the actuator is required to cause the valve to open. This is another way of saying the valve is fail closed or normally closed.
Industry:Industrial valves
An increase in air pressure to the actuator is required to cause the valve to close. This is another way of saying the valve is Fail Open or Normally Open.
Industry:Industrial valves
An increase in air pressure to the actuator is required to cause the valve to close. This is another way of saying the valve is Fail Open or Normally Open.
Industry:Industrial valves
An element or device which receives information in the form of one quantity and coverts it to information in the form of the same or another quantity. (See I/P)
Industry:Industrial valves
A flow characteristic that provides maximum change in flow rate at low travels. The curve is basically linear through the first 40% of travel. It then flattens out indicating little increase in flow rate as travel approaches the wide open position. This decrease occurs when the valve plug travel equals the flow area of the port. This normally happens when the valve characteristics is used for on/off control.
Industry:Industrial valves
A fluid-powered or electrically powered device that supplies force and motion to a valve closure member.
Industry:Industrial valves
A fluid-powered, normally pneumatic device in which the fluid acts upon a movable cylindrical member, the piston, to provide linear motion to the actuator stem. These units are spring or air opposed and operate at higher supply pressures than a spring return actuator.
Industry:Industrial valves
A guide bushing closely fitted to the valve stem and aligned with the seat. Good stem guiding is essential to minimizing packing leakage.
Industry:Industrial valves
