TECHNICAL FEATURES
The valve is biased to the relieving mode with a 100 psi (7 bar) spring. Once this threshold is exceeded, pressure at port 4 is directly added to the pressure at port
1 of the valve. For example, 1000 psi (70 bar) at port 4 will result in a pressure reading of 900 psi (63 bar) at port 1.
Maximum pressure at port 3 should be limited to 3000 psi (210 bar).
Suitable for accumulator circuits since the absence of pilot control flow results in reduced secondary circuit leakage.
Direct acting concept provides highly reliable operation in contaminated systems, especially at dead headed conditions.
Direct operated version offers superior dynamic response compared to equivalent pilot operated models.
Leakage specified in Technical Data is out of port 3 with a supply pressure of 2000 psi (140 bar) and the valve set at mid range. This leakage is directly proportional
to pressure differential and inversely proportional to viscosity expressed in centistokes.
Valve is tested for correct operation with 5000 psi (350 bar) inlet pressure.
Pressure on the drain (port 4) is directly additive to the pressure at port 1 at a 1:1 ratio and should not exceed 5000 psi (350 bar).
Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage
the seals.
Full reverse flow from reduced pressure (port 1) to inlet (port 2) may cause the main spool to close. If reverse free flow is required in the circuit, consider adding a
separate check valve to the circuit.
Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge
machining variations.
PERFORMANCE CURVES