Relief valves are produced in two types and two inlet pressure ranges, up to 450 mbar and up to 5 bar in size DN25. Safety requirements of this product are in accordance with the national standard of Iran INSO22107.
The relief valves opens when the pressure exceeds the allowable pressure and discharges pressure peaks outside into the air. It closes immediately as the pressure drops to under the set pressure. It is necessary to use it if the gas speed is more than 30 m/s.

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