B7

B7 Piston Seal

Descriptions

The profile B7 Ultrathan® piston seal is a lipseal which fits tightly in the groove. This
seal may be used for all applications where the physical properties of normal or fabric
reinforced elastomers are insufficient.

Features

• Robust seal profile for harshest operating conditions.
• Extreme wear resistance.
• Easier installation.
• Suitable for fully automatic installation.
• Assembly on one-part piston is possible.
• Insensitive to pressure peaks.
• High extrusion resistance.
• Excellent media resistance in case of
suitable compound selection.
• Suitable compounds available for
special requirements of the chemical
process industry.
• Suitable compounds available for special requirements of the food processing
industry.
• Dimensions according to ISO 5597.
• Installation in closed and undercut
housings.
• Additional sizes of machined products
available on short notice.

Range of application
Mainly for the sealing of pistons in heavy duty applications in mobile and stationary
hydraulics.

Operating pressure ≤ 400 bar
Operating temperature -35 °C to +110 °C
Sliding speed ≤ 0.5 m/s
Media Hydraulic oils based on mineral oil

Compounds
The Ultrathan® P5008 compound is a Parker material based on polyurethane with a
hardness of approx. 93 Shore A. Its main advantages in comparison with other polyurethane materials currently available on the market are the increased heat resistance
and the lower compression set.
For media containing water, we recommend our hydrolysis-resistant polyurethane
compound P5001.
Installation
The seals should have an axial clearance (see columns H and L). To avoid damage at
the sealing lips, the seals should not be pulled over sharp edges during installation.
Normally these seals may be snapped into closed grooves. Where access is restricted
special assembly tools may be required. Proposals for the design of such tools will be
provided on request.

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