Pressure/Vacuum Relief Valve (PV Valve) · PV Valves & Vent Systems
Emerson Marine Fisher PV DN50 2100mbar is a pressure/vacuum relief valve (pv valve). It is installed on cargo-tank vent piping, normally on the weather deck or at a designated vent mast or riser location. Its purpose is to control cargo-tank pressure and vacuum and, for high-velocity valves, discharge vapor in the approved manner during loading, discharge and thermal breathing. Valve seat, pallet or spring arrangement, flame-protection features where applicable, weather protection and process connection form the venting device. The exact model designation distinguishes pressure-vacuum function, flow capacity, material and approval from neighboring vent valves; refer to the manufacturer documentation for the exact figure.
What our service work and the manufacturer documentation say about keeping this model running.
Inspect valve body, seat, pallet or spring mechanism, weather cap, flame-protection parts and drain paths for corrosion, deposits and free movement. Keep vents free of paint and cargo residue and do not add unapproved screens or covers. Function-test opening and reseating using the approved workshop or onboard method. Check heating or anti-icing arrangements where fitted. Verify the valve remains matched to the approved cargo-tank vent system after replacement. Refer to the manufacturer documentation for the exact figure for opening pressure, vacuum setting, test flow and service limits.
Keep approved seat seals, gaskets, springs or pallets where serviceable, heating elements or tracing parts where fitted and manufacturer-recommended repair kits. Complete spare valves may be appropriate for critical tanker service. Replacement parts must preserve type approval and material compatibility.
Free of charge — we forward your request to qualified suppliers for Emerson Marine equipment from our network of over 114,000 maritime companies.
Other models of the same equipment type, Emerson Marine first.
Tell us what you need for this Emerson Marine Fisher PV DN50 2100mbar — a part, a service call, a second opinion. Are you Emerson Marine? Claim this brand page.
Service engineer? Write the day report for this Fisher PV DN50 2100mbar in OceanSphere Work — photos, hours and parts, as a PDF for the owner. Try it free for 14 days →
Yes. Specifications, documents and service notes for this model are readable without an account. An account adds saved searches and requests, nothing is taken away.
Yes. Tell us the manufacturer, the model and what you need — our desk asks the right suppliers from a network of over 114,000 companies and comes back with a quote or a sourcing plan.
Send us the nameplate or the correct value. We check it against the manufacturer datasheet or class-society record and update the page.