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Anderson Greenwood Type 4130 Atmospheric Pressure Relief Valve
Marvac Type 4130 Atmospheric Pressure Relief Valve
High capacity weight or spring loaded pressure relief valves that vent to atmosphere.
Designed to work closer to a tank's MAWP, increasing productivity, reducing emissions and product evaporation


  • Increased flow capacities reduce the required valve size and the corresponding connections and piping costs.
  • Fully open at 10% overpressure, enabling setting close to MAWP and minimizing tank emissions.
  • Large body for increased capacity providing high flow performance for full conformance to API2000/ISO28300.
  • Leakage rate of 0.5 scfh (0.015 Nm3 /hr) or less at 90% of setpoint.
  • Weight or spring loaded models available.
  • Choice of body materials.
  • Modular design enables all components to be removed and replaced in-situ for quicker, simpler maintenance.
  • Optional ‘all-weather’ coating prevents frozen condensate build-up and sticking of vital components in cold weather applications.