Watts 1 1 4 740 030 FS Hot Water Relief Valve, Iron, FNPTF x FNPTF, 1 1 4 in x 1 1 2 in, 30 psi 3KD38 3 poles (3NO) 3 poles (3NO) UL Listed HP @ 3 Phase 575V 10 hp HP @ 3 Phase 208V 7 1 2 hp Hz 60 Thermal Unit Code B Features Pvc Free Enclosure Type Painted Steel Sheet Product Type Motor starter Operating Voltage 600V AC NEMA Enclosure Rating 1 Starter Style NEMA Horsepower @ Three Phase 208V AC 7 1 2 hp Reversing Capability Non Reversing Overload Protection Type Thermal Horsepower @ Three Phase 480V AC 10 hp Minimum Overload Relay Current Setting Not Applicable Coil Voltage 24V AC Includes Auxiliary Contacts No Frequency 60 Hz Current AC 27 A Maximum Voltage Rating 600V AC Terminal Connection Type Screw Clamp Terminals Horsepower @ Three Phase 600V AC 10 hp Phase Three Horsepower @ Three Phase 240V AC 7 1 2 hp Operator Function Not Applicable Number of Auxillary Contacts 0 Includes Pilot Light No Maximum Overload Relay Current Setting Not Applicable Operator None Type Of Overload Melting alloy 3 Control Circuit Type Separate control circuit Pilot Light Without pilot light Control Units No control units Short Circuit Current Rating Circuit breaker: 5 kA at 600 V AC Factory Set Pressure 30 psi 000 BtuH Spring Material Stainless Steel Factory Set Pressure 30 psi Operating Pressure Minimum 30 psi For Media Water Inlet Connection Type NPTF ASME Section Code Section XIII Operating Temperature Maximum 250 Degrees F Product Type Pressure Relief Valve Operating Pressure Maximum 75 psi Outlet Connection Type NPTF Inlet Connection Gender Female Outlet Connection Gender Female Operating Temperature Minimum 40 Degrees F Country of Origin United States