Piston-Type Pressure Relief/Regulating Valves Bypasses excess liquid Adjustable to maintain control of line pressure at any pressure within the valve's operating range Selected pressure setting firmly held in place by lock nut Extra large valve passages to handle large flows Features: Flow rate to 56 GPM (212 l/min) for 1/2" and 70 GPM (265 l/min) for 3/4" 8460 uses stainless steel springs while 8460 uses steel springs - responsive to the pressure range of each valve Extra large valve passages to handle full flow from supply line Positive lock nut to hold adjustment screw firmly in place. Not affected by jarring and vibration Details: Inlet & Pipe connections: 1/2"Inlet Body Material: Nylon Bonnet Material: Aluminum Pressure Range: 300 PSI (20 bar)