Model 945 Pressure & Vacuum Tank Vents

Performance Features

  • Suitable for normal pressure and vacuum relief
  • Complies with API 2000 Seventh Edition / EN ISO 28300
  • Certified to ATEX – Directive 2014/34/EU and EN ISO 16852:2016
  • Weight-loaded offset pallet design; discharges to outlet pipe (guidance is internal to the valve body protecting from freeze-up during inclement weather)
  • Achieves full open (flowing pressure/vacuum) at just 10% overpressure. Other overpressure settings available on request.
  • Provides premium sealing with FEP diaphragms (metal-to-metal available for special requirements or higher settings)
  • Leakage rates much tighter than API 2000/EN ISO 28300 requirements
  • Weather-hood and screen protect pallets/seats from environment and contamination
  • Pallets, seats & stem-guides made from stainless steel
  • Pipeaway design prevents emission losses
  • Available in nom. diameter 2” – 12”

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  • Specification Options
  • Materials
  • Documentation


  • • Gas/air or vapour/air mixtures II 1/2 G Ex h IIBT1...T6 Ga/Gb

Connection Type

  • EN or DIN: ISO 7005-1
  • JIS B 2220
  • ASME B16.5

Compliance with Guidelines

  • Guideline 2014 / 34 / EU
  • EN ISO 28300
  • API Standard 2000 7th Edition

Materials of Construction

  Stainless Steel Aluminum Carbon Steel FEP Other Materials on request
Valve Set/Pallet
Valve Seat      


in mm in mm in mm in mm

Product Literature

Model 945