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HRU21-2.81-21 Homogeneous U-Seals


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  • Model: HRU21-2.81-21
  • 0 in Stock

2-13/16" ID X 3-1/4" OD X 7/32" HT

Homogenous U-cups (block vees) are a non-loaded, single material U-cup. The HRU seal is popular in low pressure applications where a low friction seal would be beneficial. The seal is most commonly used in pneumatic applications as a rod or piston seal. The design is suited for situations where space is limited or as an O-Ring replacement. The HRU seal is typically made from an 80 durometer Nitrile but also comes in Fluorocarbon FKM, Neoprene and other homogenous materials.

SKU HRU21-2.81-21
Weight 0.02 lb
CrossSection 7/32
A Nom ID 2-13/16
B Nom OD 3-1/4
C Nom Height 7/32
D Groove Width .250
E Rod Diameter 2.812
F Throat Diameter 2.813
G Housing Diameter 3.250
H Groove Diameter 2.812
I Piston Diameter 3.248
J Bore Diameter 3.250

As pressure is applied to the homogenous U-cup the seal experiences an increase in sealing force until it reaches the maximum pressure the seal can handle. Homogeneous U-cup seals can handle up to 500 PSI