Proportionalventil bis 76 L/Min.

Eaton Integrated - PFRD/S-12 - Priority Flow Control - Spool Type, Load Sensing
Dynamic signal type

Operation
This valve is used in the flow control mode. Pump flow from the valve inlet port 3 is delivered first to port 4 at a fixed rate; excess flow is bypassed to port 2. The valve maintains the controlled flow to 4 regardless of inlet pressure change or load pressure changes at 2 or 4. This valve is typically used with open loop load sense systems in steering and braking circuits. The static type is used for less difficult applications where response or circuit stability is not a problem. The dynamic type is used for difficult applications where response or circuit stability are critical. The load sense line connected to port 5 should not exceed 2 Meters (6 Feet) in length. Overpressure protection for the circuits connected to ports 2 and 4 must be provided by external relief valves. The control pressure is determined by assuring adequate inlet pressure to the steering unit and must be matched to the steering unit’s required flow. The control pressure must be supplied to the valve as a minimum inlet pressure. The pressure at port 4 can vary by 10% when the load at the excess flow port 2 varies from 0 to maximum pressure.

Features
Hardened and ground working parts to limit leakage and extend service life. Robust design with a 280 bar max pressure rating.