900 Series DIN Spring loaded Pressure Safety Valve

900 Series DIN Spring loaded Pressure Safety Valve /

900 DIN Spring loaded Pressure Safety Valve

DIN Standard Safety Valve Features:

Safety valves were first used on steam boilers during the industrial revolution. Early boilers without them were prone to accidental Explosion.
Safety valves also evolved to protect equipment such as pressure vessel (fired or not) and heat exchangers. Safety valve term should be limited to compressible fluid application (gas, vapor, steam).

The two general types of protection encountered in industry are thermal protection and flow protection.

For liquid-packed vessels, thermal relief valves are generally characterized by the relatively small size of the safety valve necessary to provide protection from excess pressure caused by thermal expansion. In this case a small valve is adequate because most liquids are nearly incompressible, and so a relatively small amount of fluid discharged through the relief valve will produce a substantial reduction in pressure.


DIN Standard Safety Valve Specification

Type Nominal Pressure Body Material Nominal Diameter Working Temp.
901/902/911/912 PN40/16 1.0619+N DN20/32-DN150/250 -10C~450C
901/911 PN40/16 1.4408 DN20/32-DN100/150 -60C~400C
DN 20/32 25/40 32/50 40/65 50/80 65/100 80/125 100/150 120/200/ 150/250
Throat Diameter do


18 22 29 36 45 58 72 80 100 125
Orifice Area Ao(mm) 254 398 661 1018 1590 2688 4072 6362 8825 12266
Weight (Kg) 8.5 10 14 20 28 40 53 8

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