Measure Seals

How to Measure Seals

Click on the images below for more information.

How to measure a Ucup Seal used on a Pump Piston Ucup Seal used on a Pump Piston Click to enlarge How to measure a Oring used on a Pump Piston Oring Click to enlarge
How to measure a Ucup Seal used on a Ram Ucup Seal used on a Ram Click to enlarge How to measure a Oring used as a Wiper Oring used as a Wiper Click to enlarge
How to measure a Oil Seal used as Wiper Oil Seal used as Wiper Click to enlarge How to measure a leather piston cup How to measure a leather piston cup Click to enlarge
How to Measure a Oring with Retainer How to Measure a Oring with Retainer Click to enlarge How to Measure a Snap in Wiper How to Measure a Snap in Wiper Click to enlarge
How to measure Vpacking How to measure Vpacking Click to enlarge  
Seal Dimensions

Key: I.D. = Inside Diameter   O.D. = Outside Diameter   H = Height   C/S = Cross Section = (O.D. - I.D.)/2

Measurements for a typical O-ring O-Ring Measurements Measurements for a typical U-seal U-Seal Measurements
Measurements for a typical wiper Wiper Measurements Measurements for a typical piston cup Piston Cup Measurements
Measurements for a typical V-packing set V-Packing Set Measurements
Metal Dimensions
Wiper Key:
R = Rod - Wiper I.D.
Dw = Groove Diameter - Wiper O.D.
Ww = Groove Width - Wiper Heel Height
Rod Seal Key:
R = Rod - Rod Seal I.D.
Dr = Groove Diameter - Rod Seal O.D.
Wr = Groove Width - Rod Seal Height
Gland Seal (usually an O-ring) Key:
Dg = Groove Diameter - Gland Seal I.D.
Wg = Groove Width - Gland Seal Cross Section
Piston Seal Key:
B = Bore - Piston Seal O.D.
Dp = Groove Diameter - Piston Seal I.D.
Wp = Groove Width - Piston Seal Height

Measurements for a typical cylinder

Cylinder Measurements