Industrial Hydraulic - Pressure Control Valves

Unloaded Relief Valves PCV14

General Description

These valves are used in oil hydraulic circuits where a pressure regulator is required to automatically unload the pump by diverting the pump delivery to the reservoir, at low pressure, when the accumulator pressure reaches the desired maximum (or “cut out”) pressure. When the accumulator pressure drops to the “cut in” pressure (approximately 85% of the desired maximum), the valve directs pump delivery to the accumulator and hydraulic system. The valve may also be used with a double pump to deliver a large volume of oil to the system at low pressure and small volume at high pressure, serving the same function as an unloading valve. A separate right angle check valve , CV1-¾”-Y or CV1-1¼”-Y must be provided to maintain accumulator hydraulic charge or unloading of high volume pump and prevent back flow when pump is unloaded.