<div class="htmlview paragraph">Small solenoid operated cartridge valves provide flexibility to supply many functions in hydraulic systems. A line of solenoid operated two way, two position cartridge directional control valves has been developed in conjunction with a series of solenoid coils with different terminations. The coils are completely interchangeable with any of the valves.</div> <div class="htmlview paragraph">Additional development in solenoid operated cartridge valves has resulted in a co-axial solenoid cartridge relief valve which can also utilize the same solenoid coils as the other valves.</div>