Claron Polyseal Single Acting Rod Seal CPS

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The Claron style CPS is a symmetrical profiled semi-solid seal designed for narrow section rod sealing and manufactured in a high performance grade of polyurethane. The sealing lips are machine trimmed to ensure dimensional consistency and good low pressure sealing whilst polyurethane exhibits outstanding abrasion and extrusion resistance providing a rod seal with a consistent operating performance.

Maximum  Pressure
Max Speed                         Temp. Range Temp. Range
m/s                               -40°C to 80°C -40°C to 110°C
0.50                                   280 Bar
0.15                                   400 Bar
250 Bar
350 Bar

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.

AU Polyurethane
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% 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.


f8 H9 H10 +0,25 Nominal Nominal Min Max.
Ød ØG ØD -0.00
L S C R1
1 1 2
CPS 022028 22 28 5,5 4,5 3,0 3,0 0,20
CPS 030038 30 38 9,0 8,0 4,0 3,0 0,20
CPS 030043 30 43 11,0 10,0 6,5 3,0 0,20
CPS 030045 30 45 11,0 10,0 7,5 3,0 0,20
CPS 038045 38 45 7,0 6,0 3,5 3,0 0,20
CPS 045053 45 53 9,0 8,0 4,0 3,0 0,20
CPS 050058 50 58 9,0 8,0 4,0 3,0 0,20
CPS 060066 60 66 6,0 5,0 3,0 3,0 0,20


Claron Polyseals


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