Buna-N Gasket for 18" T-Handle Flush Manhole (Model #TH430-ORNG18)

Buna-N Gasket for 18" T-Handle Flush Manhole (Model #TH430-ORNG18)

The Model #TH430-ORNG18 is a premium, seamless replacement perimeter gasket engineered specifically for 18" quick-acting T-handle flush manholes. Fabricated from high-density Buna-N Nitrile rubber, this heavy-duty molded seal drops directly into the cover plate's machined groove to create an impenetrable fluid and pressure barrier. The specialized elastomeric compound delivers excellent compression recovery, resisting long-term flattening and deformation under the continuous clamping force of under-deck strongbacks.

Key Features

  • Superior Oil & Fuel Resistance: Formulated to withstand continuous contact with marine diesel, lubricants, sludge, and saltwater without swelling, rotting, or losing tensile strength.
  • Seamless Factory Vulcanization: Molded as a single continuous loop to eliminate weak seam joints, preventing split-point failures under intense cyclic loading.
  • High Compression Recovery: Features excellent elastic memory to maintain a tight, continuous seal even after thousands of open-and-close hatch cycles on high-traffic work decks.