spool hydraulic directional control valve
MICO® Modulating Hydraulic Power Brake Valves provide directional control of brake system pressure. They also provide the operator with a "pedal feel" proportional to brake system pressure. These valves are designed for use with vehicles that are equipped with other hydraulic power devices. This feature eliminates the need for a separate power brake unit or separate hydraulic fluid system. There are single valves for single brake systems, tandem valves for split brake systems, valves with pilot sections, and reverse modulating valves. MICO offers modulating valves in a spool design and a poppet design. Although there are inherent benefits to both, the spool design provides lower hysteresis while the poppet design provides very low leakage. Modulating valves can be operated by pedal, lever, cable, cam, pilot pressure, and electro-mechanical devices.