DZ Pressure Sequence Valves

The Bosch Rexroth DZ Pressure Sequence Valves are 2-way spool valves primarily designed to control the switching sequence in a hydraulic circuit based on a predetermined pressure level. Their function is to direct flow (P to A) only after the pressure in the inlet line (P) has risen to a manually adjustable set point, at which time the spool shifts to allow flow to the secondary circuit. The DZ series is suitable for use as a preload valve, sequence valve, or switch-over valve. The series includes direct-operated types (DZ 6 DP) for lower flows and pilot-operated types (DZ) for larger flows up tand a maximum operating pressure of 315 bar. An optional check valve can be integrated to permit free flow from port A back to port P.