HS-U90 Head Seal | 90A Urethane Hydraulic Head Seal | HydraPak Seals, Inc
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HPSI HS-249U90

HS-249U90

90A Urethane Head Seal, 4-7/8 X 5-1/8 X 3/16

Part #:
HS-249U90
Min. Order Qty: 1

Brand: HPSI

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HPSI

The HS-U90 Head Seal is a durable static head seal molded from 90A urethane and designed to replace the O-ring and back-up ring at the top of a hydraulic cylinder. Its symmetrical one-piece design helps prevent common installation and operating failures such as back-up blowout and pinched back-up rings, particularly in cylinders with high eccentricity or large extrusion gaps. The unitary construction also reduces installation damage and simplifies assembly.

Bore Diameter      :      5.125 in
Cross Section      :      1/8 in
Dash Number      :      249
Height      :      3/16 in
Inside Diameter      :      4-7/8 in
Material      :      90A Urethane
Outside Diameter      :      5-1/8 in
Part Number      :      (Prefix)-(Dash#)-(90A Urethane)
Pressure Range      :      0 TO 10,000 PSI
Temperature Range      :      -40° to 200°F
  • 90A urethane construction provides durable sealing performance
  • Designed as a static hydraulic cylinder head seal
  • Replaces an O-ring and back-up ring combination
  • Symmetrical one-piece design simplifies installation
  • Helps prevent back-up blowout
  • Helps prevent pinched back-up rings
  • Well suited for cylinders with high eccentricity or large extrusion gaps
  • Unitary construction helps reduce installation damage
  • Simplifies cylinder assembly