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PolyPak Hydraulic Seal with Beveled Lips (BPP)

Brand: Parker Hannifin

Parker's Type B PolyPak® (BPP Profile) is a squeeze seal with a symmetrical profile for use in either rod or piston applications in hydraulic systems. 

The rectangular shape of its cross section ensures stability in the gland.    

The standard Molythane shell (seal body) provides high wear resistance and the O-ring energizer element functions as a spring to maintain sealing contact under low pressure or vacuum applications.   

The beveled lip design of the Type B PolyPak is excellent for cutting fluid film. 

The sharp beveled lip is formed by a precision knife trimming process. 

A wide selection of sizes and alternate compounds allow this profile to match up with many hydraulic applications. 

The Type B PolyPak is an economical choice as a stand-alone seal or can be used in tandem with a buffer seal. In piston applications, this seal will function as a unidirectional seal.

Dual Type B PolyPak seals should not be installed back-to-back in bi-directional pressure applications, as a pressure trap between the seals may occur. Instead, for bidirectional piston sealing, incorporate a PIP Ring®.

Specifications

Body Material

  • FKM, TPU, TPC-ET, EPDM, HNBR, XNBR

Color

  • Various Depending on Material

Fluid Compatibility

  • Various Depending on Material

Industry Standards

  • Various Depending on Material

Length Unit of Measure

  • inch

Maximum Pressure (psi)

  • 2000 to 7000

Maximum Surface Speed (ft/min)

  • 100 (0.5 m/sec)

Media

  • Hydraulic

Nominal Hardness

  • 95A, 90A, 60D

Polymer Family

  • FKM, FPM (Fluorocarbon), TPU (Polyurethane), TPC-ET (Thermoplastic CoPolyester Elastomer), EPDM, EPM, EPR, (Ethylene Propylene Rubber), HNBR, HSN (Hydrogenated Nitrile-Butadiene), XNBR (Carboxylated Nitrile-Butadiene)

Spring Material

  • FKM, NBR, EPR

Thermal Application (°F)

  • Various Depending on Material
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