White Max Obround Boiler Handhole Gaskets (6 Pack)

SKU: OGWM3254505625OB

gasket_size: 3-1/4 x 4-1/2 x 9/16 x 1/4

WHITE-MAX® Advantages:

  • High adaptability, suitable for flanges with corrosion and with uneven sealing surface
  • Pressure test and service with the same gasket
  • Very easy installation and removal
  • Anti-sticking material, low eff ort for surface cleaning when installing a new gasket
  • No embrittlement of the gasket in storage or in service
  • Pure PTFE, conforms to FDA standards


  • 1/8" Thickness unless otherwise noted
  • Temperature Minimum -450°F (-268°C)
  • Temperature Maximum/Spike 500°F/600°F (260°C/315°C)
  • Pressure Full Vacuum to 3000 psi (206.8 bar)
  • pH 0-14 (Except molten Alkali Metals and Elemental Florine)
  • Compressibility (ASTM F36) 55-62%
  • Recovery (ASTM F36) 12%
  • Creep Relaxation (ASTM F38) 32% @ 212°F 16% @ 73°F
  • Sealability (ASTM F37B) ASTM Fuel A 0.00 ml/hr, Nitrogen 0.02 ml/hr
  • Gas Permeability (DIN 3535) 0.00 cc/min
  • Ignition Loss (ASTM F495) 30%
  • Density 0.85 g/cm³
More Information
Manufacturer White-Max
PSI # Rating 3000#
Temperature rating 600°


Manufacturer White-Max
PSI # Rating 3000#
Temperature rating 600°

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