Parker Seal Group
Piston Seal B7 Profile

U-cup Piston Seal

Standard Materials:

  • P4615A90 Molythane
  • P4300A90 Resilon® HT
  • P4700A90 Polyurethane
  • P5065A88 Low temperature urethane

Availability: 

  • 0.375" to 38" bore diameter

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The B7 profile is a non-symmetrical, hydraulic cylinder piston seal. The knife trimmed, beveled lip contacts the bore to provide enhanced low to high pressure sealing and wiping action. When installed, the diameter of the B7 profile is stretched slightly to fit the gland. This ensures a tight static seal with the gland and improves stability in application. The B7 profile is available in Parker proprietary urethane compounds providing excellent wear, extrusion, and compression set resistance. The B7 profile is a uni-directional seal. Two seals can be placed on a piston, back to back, in separate glands offering bi-directional fluid sealing.