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Betts · Body & Cab
PPVL-820BXB
In stock · ships from Knoxville
This is a 20-inch offset manhole cover assembly for cargo tank trailers, primarily used on DOT 406/TC406 specification tanks that haul gasoline, fuel, and chemicals.
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Verified fitment for 2 applications
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Designed for code trailers with a 20‑inch offset clamp‑ring style manhole. Always confirm bolt pattern, vent configuration, and tank test pressure (36 psig) before ordering.
Part data verified against 5 catalog sources
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It integrates a 10-inch reclosing pressure relief valve (PAF 406-98) with surge suppression, meeting federal dynamic surge requirements, and includes a 6496 P/V normal vent for pressure and vacuum protection. The hinged PRV cover also acts as a quick‑open inspection hatch with a secondary safety catch. It is replaced when the main seal is damaged, the relief valve fails testing, or during tank recertification.
Part Number: PPVL-820BXB
20' OFFSET MANLID
Unit: ea
Dealer: Post Onsite
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