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Specifications for safety shut-off OPSO-Pneumax

Safety shut-off type OPSO-Pneumax

An OPSO-Pneumax is a safety shut-off unit that is used in combination with a ball valve fitted with an actuator. Often as a second safety in an installation. This combination is also called safety valve.




Maximum operating pressure

The maximum inlet pressure of the 3/2 valve = 10,0 barg.

The maximum shut-off pressure of the unit LP = 1,4 barg.

The maximum shut-off pressure of the unit HP = 8,5 barg.

Operating temperature

-20°C to +60°C

Connection sizes

3/2 valve: 1/4 “BSP.

Shut-off unit: 1/8 “NPT.

Spring range

LP = 18 to 1400 mbarg.

HP = 1,0 to 8,5 barg.

Applicable gases

Natural gas, LPG, propane, butane, air and nitrogen (not suitable for oxygen).


The safety shut-off can be provided with a stroke indicator. This indicates whether the safety shut-off has been addressed. Optionally, the stroke indicator can also be provided with a remote signalling (read contact or a proximity switch).