Buna-N Gasket for 18" Multi-Bolt Raised Manhole (Model #MB-G18RD-RSD)

Buna-N Gasket for 18" Multi-Bolt Raised Manhole (Model #MB-G18RD-RSD)

The Model #MB-G18RD-RSD is a flat-profile, commercial-grade replacement flange gasket engineered specifically for 18" round multi-bolt raised manholes. Fabricated from high-density Buna-N Nitrile rubber, this heavy-duty die-cut seal is designed to drop over the bolt-hole pattern of raised coaming flanges, forming a positive fluid and vapor boundary. The material compound is optimized to withstand intense perimeter bolting torques without squeezing out of alignment or tearing, maintaining absolute sealing integrity under severe green water wash and high tank pressures.

Key Features

  • Flange Bolt Hole Pre-Cut Pattern: Precision punched to clear standard raised multi-bolt flange fasteners, allowing for immediate alignment and drop-in field installation.
  • Excellent Petroleum & Oil Resilience: Impervious to swelling, degradation, or structural softening when in constant contact with marine fuels, hydraulic lubricants, and sludge.
  • High Torque Extrusion Resistance: High-durometer formulation prevents the gasket profile from spreading or thinning unevenly when heavy clamping torches are applied to the bolt perimeter.