FVA9720BXB - Betts - 20" Paf450 Manhole Assembly Buna-N Gaskets No Collar - LJI Part: FVA9720BXB

The Betts FVA9720BXB PAF450 Manhole Assembly incorporates a 10-inch reclosing pressure relief valve (PRV) mounted to a center-mount, 20-inch clamp ring style manhole, including a P/V normal vent. The PRV cover doubles as a quick-open inspection hatch with a secondary safety catch. The manhole and clamp ring are certified and marked in accordance with 49CFR178.345-5 with a 36 psig test pressure. Note: 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 a full replacement assembly must meet the less-than-1-liter surge leakage requirement of 49CFR178.345(b)(3)(ii). The PAF450 is therefore not permitted as a replacement on MC306 or DOT406 cargo tanks, though it may be installed on non-specification tanks or tanks operated where regulations permit — see Betts' PAF406 and PAF306 lines for tanks requiring less-than-1-liter surge compliance. A self-latch version is available by specifying part number 9763 in place of 9720, and a standard unit can be converted to self-latching with kit 6807SL-KIT1. Use part number FVA9720 for the self-latch unit. The weld collar is not included and should be selected separately.

• Size: 20 inches
• PRV Size: 10 inches
• Gasket Material: Buna-N
• Test Pressure: 36 psig
• Weld Collar: Not Included
• Self-Latch Conversion Kit: 6807SL-KIT1
• Model: PAF450