3-Way 3-Position Hydraulic Valves

3-way valves have 3 ports: Pressure (P), Tank (T), and Advance (A). The 3 positions are used to control the advance, retract, and hold of the tool or cylinder. 3-way valves are designed to operate single-acting hydraulic tools. Single-Acting tools and cylinders require at least a 3-way valve, and can, under certain instances, be operated with a 4-way valve.