20" PAF 406-98 Tank Truck Manhole Assembly

The PPVL720BXB 20-inch PAF 406-98 tank truck manhole assembly is designed for DOT 406 and MC306 cargo tank applications requiring secure tank access and reliable pressure relief performance.

This clamp ring style manhole features an integral surge suppression pressure relief valve, quick-open inspection hatch, and secondary safety catch for heavy-duty cargo tank service.

Key Features

• 20" clamp ring style tank truck manhole assembly
• PAF 406-98 surge suppression pressure relief valve
• Integral 10" reclosing pressure relief valve
• Designed for DOT 406 and MC306 cargo tanks
• Quick-open inspection hatch design
• Secondary safety catch included
• Certified to 49CFR178.345-5
• Test pressure rated to 36 PSIG
• Clamp ring and bolt secured construction
• Buna-N seal material
• Approximate weight: 31 lbs

Construction Details

The PPVL720BXB is built for demanding tank truck service with a clamp ring and bolt secured design for dependable sealing and secure installation.

The BXB suffix indicates Buna-N seal material, providing reliable sealing performance for compatible cargo tank service applications.

The integrated pressure relief valve and inspection hatch design help support safe operation, inspection, and maintenance access.

Important Notes

Verify compatibility with tank design, lading, gasket material requirements, and applicable DOT cargo tank specifications before installation.

Installation and service should be performed by qualified personnel following applicable transportation safety standards.

Consult manufacturer documentation for full pressure relief, inspection, and maintenance requirements.