The external safety relief valves are installed outside the pump mechanism as part of the fluid line system. Similar to what an internal valve does, the external valve is used to manage excessive pressure in the fluid discharge line.
External weather conditions or filling inconsistencies can affect the pressure inside fluid lines. The excess pressure is controlled and safety hazards are prevented with the pressure relief valve.
External safety relief valves are designed as primary safety relief valves for applications such as LPG storage system, NH3 storage system, etc. These valves are made using durable stainless steel or carbon steel as per the requirement.