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NEMA - National Electrical Manufacturers Association.
Electrical enclosure ratings.
IP - Ingress Protection.
Electrical enclosure ratings.
NAMUR - National Association of Manufacturers (European)
Mounting pattern.
ISO - International Organization for Standardization
Mounting pattern.
API - American Petroleum Institute
Torque - Force required to turn valve or damper, stated in inch/pounds
Quarter turn - A device which rotates 90˚
Pneumatic - Air powered device
Electro-pneumatic - Air powered device controlled by an electrical signal,
most commonly 4- 20 mA
Pneumatic Rotary Actuator - Air powered device which rotates valves or
dampers
Electric Rotary Actuator - Electrically powered device which rotates valves
or dampers
Double Acting Actuator - Power open/ Power close
Spring Return - Power open/ Spring close
Explosion Proof - Enclosure rating, of sufficient construction to contain
explosion
Intrinsically Safe - Constructed of materials which prevent thermal or
electrical ignition
Limit Switch - A device which contains mechanical or proximity switches
for the purpose of sending a signal to a remote device.
In terms of actuation, also known as a position indicator.
Positioner - In terms of actuation, a device which modulates (controls) travel
of valves or dampers
Solenoid Valve - An electrically controlled valve to control the flow of air,
gas, or fluids
Direct Mount - Ability to mount directly without a separate bracket and
coupler
Modulating - Controlling position of valve or damper between fully open or
fully closed
Bracket/Coupler - Means of connecting valve stem, or damper shaft to
An actuator
Cv - Flow rate of clean water, through a valve, stated in GPM
(gallons per minute) as measured at 1 psi. |