Claron Polyseal Single Acting Rod Seal CPUI/OR

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Claron style CPUI…/OR is a Polyurethane U-seal incorporating an O-Ring energiser. This guarantees the pre-loading of the seal lips for low pressure sealing, thus optimising seal performance. Polyurethane provides outstanding abrasion and wear resistance ensuring that the seal operates in the most arduous conditions. The anti-extrusion ring which is energised at high pressures, increases the maximum working pressure as well as protecting the seal against pressure spikes.

These range perameters are Maximum simultaneous conditions.

Optimum service conditions are affected by temperature, speed, pressure, surface finish and extrusion gaps.

Refer to Appendix 1 for further information.

H Mineral oil without additives 100
H-L Mineral Fluid with anti corrosion and anti ageing additives 100
H-LP Mineral oil as HL plus additives reducing wear, raising load 100
H-LPD Mineral oil as H-LP but with detergents and dispersants 100
H-V Mineral oil as H-LP plus improved viscosity temp. 100
HFA E Emulsions of mineral oil in water. Water content 80-95% 40
HFA S Synthetic oil in water. Water content 80-95% 40
HFB Emulsions of water in mineral oil. Water content 40% 40
HFC Aqueous polymer solutions. Water content 35% ns
HFD R Phosphoric acid ester based ns
HFD S Chlorinated hydrocarbon based ns
HFD T Mixtures of HFD R and HFD S ns
HEPG Polyglycol based ns
HETG Vegetable Oil based 60
HEES Fully synthetic ester based 60

Note: Clearance gap F is the maximum permissable. i.e. gap completely on one side, in the temperature range of -30°C to 80°C The use of a suitably selected Claron bearing ring will effectively reduce the clearance gap F max. to a value closer to F/2 thus increasing the pressure capability of the seal.


For surface finish and recommended lead in chamfers refer to the illustration below. For housing dimensions and machining tolerances refer to the catalogue page of selected seal. Refer to Appendix 4 for value of tolerance symbols.


For the seal to function correctly, it is important that care be taken in fitting the seal within its housing. For a detailed checklist, refer to Appendix 3.

Part Number f8      H9 H10 +0.25
Nominal Nominal Min Max.
Ød1     ØG ØD1 L1 L2 S C R1
CPUI 216157/OR 40 55 12,5 11,4 7,5 5,0 0,4
CPUI 255196/OR 50 65 12,5 11,4 7,5 5,0 0,4
CPUI 295236/OR 60 75 12,5 11,4 7,5 5,0 0,4
CPUI 314255/OR 65 80 12,5 11,4 7,5 5,0 0,4
CPUI 413354/OR 90 105 12,5 11,3 7,5 5,0 0,4
CPUI 433354/OR 90 110 12,5 11,3 10,0 6,5 0,6



Claron Polyseals


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