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Connection Type
MNPT x FNPT
Setting Pressure
150
Softgoods material
Buna-N
Spring Material
Stainless Steel
Nomenclature
0371271 VALVE CALB/PRS RLF 1/2
Pressure Adjustment Range
50 to 175
Temperature Rating
180
Nominal Size
1/2
Operating Pressure
300
Dimensions
1-5/8 in W x 3 in H
This 1/2 in calibrated pressure relief valve is used in commercial, residential and industrial applications to protect against excessive pressure in systems containing water, oil or air. It consists of a bronze body construction with NPT threaded male inlet and NPT threaded female (drain) outlet connections, stainless steel spring, brass bonnet, Buna-N disc and Buna-N O-ring. Series 530C has a calibrated adjustment feature for setting the valve to the required relief pressure and is ideal for bypass thermal expansion pressure relief (not ASME approved). It is for use in fire protection systems. The maximum pressure is 300 psi (20.67 bar). The adjustable pressure range is 50 to 175 psi (3.45 to 12.06 bar).