Claron Polyseal Single Acting Piston Seal CPE

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CLARON STYLE CPE is designed for use as a single acting Piston seal. The seal is a precision moulded Nitrile rubber sealing element with a fabric reinforced base to resist extrusion. Style CPE also has the added benefit of a clip on POM anti-extrusion ring. Designed with initial radial interference to effect low pressure sealing, at higher pressures the seal is energised thus increasing the sealing force. Rubberised fabric has the advantage of retaining the sealing media within it’s surface, thus reducing friction and wear. Style CP is produced with radial grooves incorporated into the top of the seal on the pressure side. This innovative design ensures a rapid energisation of the seal without excessive end float and resultant wear. Style CP is an effective design over a wide range of applications.

Operating conditions:

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.

NBR Rubber
DIN Hydraulic Fluid Description °C
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% 55
HFA S Synthetic oil in water. Water content 80-95% 55
HFB Emulsions of water in mineral oil. Water content 40% 60
HFC Aqueous polymer solutions. Water content 35% 60
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 NS

Maximum Diametral Clearance F

Note: Clearance gap F is the maximum permissable. i.e. gap completely on one side, in the temperature range of -30°C to 100°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 Rod application see section C.


Style CPE is designed to be fitted onto a spit and may be used together with Claron Style PSR retainer. 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.


H10                                 js11                          +0.025                   Nominal sec.                 Min                      Max

ØD1 Ød1 L1 S C R1
CPE 157110 40.00 28.00 9.00 6.00 3.00 0.40
CPE 196149 50.00 38.00 9.40 6.00 3.00 0.40
CPE 236177 60.00 45.00 10.50 7.50 4.00 0.40
CPE 314236 80.00 60.00 14.50 10.00 5.00 0.40
CPE 393314 100.00 80.00 14.00 10.00 5.00 0.40



Claron Polyseals


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