(Not all information is needed depending on application.)
Media
Pressure - min, max, and normal
Temperature - min, max, and normal
Required flow or Cv - min, max, and normal
Valve material of construction
Stem and seat packing
What class shut off (Class VI or other)
Connection type
Acceptable pressure drop
Pneumatic or electric actuator
i/p, p/p, digital, self operating, other positioner
NEMA rating
Normally open, normally closed, or double acting
Accuracy
Voltage for actuator and/or positioner
Actuator material of construction
Speed of actuation
Heating Side
Media
-Temp in
-Temp out
-Flow rate
-Acceptable pressure drop
Cooling Side
-Media
-Temp in
-Temp out
-Flow rate
-Acceptable pressure drop
BTU's required (if known)
Notes:
Not all is required and depends on application.
Must use worst case scenario for temps and flows to assure enough thermal transfer.
Bore diameter
Material of construction
Single acting or double acting
mMunting style
Rod
Stroke
Thickness
Connection type and size
Material of construction
Cushions?
Head
Cap
Seal material of construction
Operating conditions
Lbs of force required
Media
Temp
Pressure operating
Pressure max
Speed of stroke
(Also see control valve)
Speed of cylinder stroke (for Cv)
Volume of cylinder (for Cv)
Voltage
NEMA rating
Manual override?
Type (3-way - 2-position, etc)
Manifold mount?
Connector
Lighted?
DIN w/cable or strain style
Atmospheric conditions
Expected life/how reliable
