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ADR/EN 500 mm Bolted Manhole Layout 8547 with Model PAF EN450 PRV
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Model EPVN8547 incorporates a bolted ∅500mm (∅195/8”) manhole with a ∅254mm (∅10”) PAF EN450 pressure relief valve (PRV) and a 6866AL normal vent.

Regulation Requirements
The manhole assembly conforms to ADR 2021, EN13317:2018 and EN13314:2002.  The normal vent meets EN14595:2016.

Manhole Specification
The manhole has an industry standard 24-hole bolt pattern sized for M8 bolts. The cover has provisions for a threaded style vapor recovery vent and overfill protection sensor. Manhole cover material conforms to the minimum 12% elongation code requirement.

Emergency Venting
The emergency pressure relief device opens to relieve excess pressure within the tank compartment and closes when the excess pressure has been relieved. See technical specification chart below for cracking pressure and flow capacities. The pressure relief valve also serves as a quick open inspection hatch that incorporates a secondary safety catch that enables internal pressure to escape prior to the latch being fully released.

Normal Venting
PPVL models come standard with a 6866AL pressure/vacuum vent (normal vent). The unique design of the p/v vent incorporates rollover protection to help retain product at any tank orientation.