4-Way 2-Position Hydraulic Valves

4-way valves have 4 ports; Pressure (P), Tank (T), Advance (A) and Retract (B). The 2 positions are used to control the advance and retract of the tool or cylinder. When a hold position is needed, you should choose a valve with an additional 3rd position. 4-way valves are designed to operate double-acting hydraulic tools and cylinders. They require a 4-way valve, providing control of the flow to each cylinder port.