FIG133 Bronze open discharge pressure relief valve.

The FIG 133 is an open discharge version of the FIG 134, commonly used for preventing safe pressures being exceeded on compressed air applications. Typically used for air, where high discharge rates are not required.

Size Range:

• DN20 TO DN100 (¾” TO 4”)

Pressure Range:

• DN20 (3/4”) – DN25 (1”) = 0.7 bar.g (10 psi) to 22.5 bar.g (326 psi)
• DN32 (1 ¼”) – DN50 (2”) = 0.7 bar.g (10 psi) to 20 bar.g (290 psi)
• DN65 (2 ½”) – DN100 (4”) = 1.0 bar.g (15 psi) to 15 bar.g (218 psi)

Pipe Connections:

• Male Inlet (BSP, BSPT, NPT) X Open Atmospheric

Features and Benefits:

• Able to accommodate customer’s connection requirements.
• Full Cat IV PED approval.
• Quality assurance approved to BS EN ISO 9001: 2015
• See data sheets for Discharge Capacities

Testing:

All Gresswell Relief Valves are given a hydraulic seat tightness test before leaving the factory and all valves are supplied pre-set. Special tests or witness testing can be arranged at extra cost.

Flow Substance:

Gas

Applications:

Compressor, pipeline and reciever protection.