Pressure Reducing Valve series SDRA

Pressure reducing valves series SDRA… are high performance pressure reducing valves with a size 07 interface to ISO 4401-07-07. The main components of the valves are a sandwich body (stack-mounting body) and the screw-in cartridge (type DRPB-5-16…). The pressure reducing cartridges have a seated pilot stage, and the main stage is designed on the sliding spool principle. Four pressure ranges are available for the inline function in P. Pilot oil only flows when the pilot stage is active (main stage reducing), with internal drain options to ports Y, A, or B. In this state, the se condary pressure will be maintained at a constant level as long as the primary pressure does not fall below that level. It will be maintained in the secondary side of the P line, and also in A or B, dependent on the operating position of the directional valve. A pressure-gauge port M (G1/4”) is also pro vided in the secondary circuit. The pressure is set by means of an adjusting screw or a hand-knob on the pilot cartridge. To safeguard pressure settings, the adjusting spindle can be sealed with a tamper-proof cap.