Claron Polyseal Single Acting Rod Seal HBTY

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Claron style HBTY is a single acting seal for gland applications useing the same housing designs as Style HBI and Style HBT. Designed as a high pressure, low friction seal for use in second generation tandem sealing arrangements where the lower friction seal is used on the pressure side, and a ‘low leak’ but higher friction seal on the non pressure side to collect the oil film during the positive stroke. This type of arrangement is used where both low friction and low leakage are required.

The seals high pressure resistance makes it suitable for use in heavy duty applications where shock loads and pressure spikes occur, as found in mobile plant equipment.


Both the inner sealing element and the energiser are available in a wide range of materials to suit a variety of applications. The inner sealing element is manufactured from high performance glass filled PTFE, energised by an NBR Sqaure section Ring as standard. Materials can be specified by a part number suffix E.g. HBTY065/B Bronze Filled PTFE.

Operating range:

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

Refer to Appendix 1 for further information.

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.

F/2 should be calculated allowing for all movements due to side-load and cylinder expansion.


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. For value of E/2, refer to the bearing ring requirements.

Refer to Appendix 4 for value of tolerance symbols.


Style HBT may be deformed and fitted into a closed groove. 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.


Ød1 ØD1 L1 C

HBTY 050









HBTY 055 55 70.5 6.3 4
HBTY 060 60 75.5 6.3 4
HBTY 065 65 80.5 6.3 4
HBTY 070 70 85.5 6.3 4
HBTY 075 75 90.5 6.3 4
HBTY 080 80 95.5 6.3 4
HBTY 085 85 100.5 6.3 4
HBTY 090 90 105.5 6.3 4
HBTY 095 95 110.5 6.3 4
HBTY 100 100 115.5 6.3 4
HBTY 105 105 120.5 6.3 4
HBTY 110 110 125.5 6.3 4
HBTY 115 115 130.5 6.3 4
HBTY 120 120 135.5 6.3 4
HBTY 130 130 145.5 6.3 4






Claron Polyseals


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