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Water Truck Parts: In Stock, Top Quality, Ship in 1 Day! Order by 2PM MST.
Water Truck Parts: In Stock, Top Quality, Ship in 1 Day! Order by 2PM MST.

Manway 20", Vented Sealing Lid, Steel, Zinc Plated, Betts FVA9720BXB (TANK20MLV)

SKU 0001179
Brand Betts
Only 2 left!. Available on backorder
Original price $442.00 - Original price $442.00
Original price
$442.00 - $442.00
Current price $442.00

Product Images

Images are for representation only and may differ from the actual product.

Model PAF450 incorporates a 10” (254mm) reclosing pressure relief valve (PRV) mounted to a center mount 20” (508mm) clamp ring style manhole. It includes a P/V normal vent. The PRV cover also serves as a quick open inspection hatch that incorporates a secondary safety catch. The manhole and clamp ring are certified and marked in accordance with 49CFR178.345-5 with a test pressure of 36 psig.

The PAF450 was legal for installation on US DOT MC306 cargo tanks prior to August 31, 1998. Per 49CFR180.405(h)(2), a properly functioning PAF450 can be repaired and maintained but if the entire assembly needs to be replaced, it must be a PRV that meets the less-than 1 liter surge leakage requirement of 49CFR178.345(b)(3)(ii). Therefore, Model PAF450 is NOT permitted as a replacement on MC306 or DOT406 cargo tanks but can be installed on non-specification tanks or on tanks built and operated in countries where regulations permit. See Betts’ complete line of PAF406 and PAF306 PRV’s that meet requirements of less-than 1 liter surge leakage.

  • Easy Installation
  • Low Maintenance
  • Economical
  • Large Opening

Manhole Collar Sold Separately

Manhole Cover Steel Zinc Plated
Strongback and Latch Steel Zinc Plated
PRV Cover Aluminum
Normal Vent 6238AL Aluminum
Gasket Material Buna-N
Size 20"

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