026-52361-0 R4U10-53330A110

by parker

Subplate mounted unloading valves series R4U are used to unload a circuit at low pressure. The mechanically adjustable pressure signal to unload the main stage has to be applied to port X. The pressure differential between opening and closing is nominal 15 or 28 % of the setting pressure:- 28 % for pressure stages 105 and 210 bar- 15 % for pressure stage 350 barTypical applications are unloading of pumps in an accumulator circuit or unloading of the low pressure stage of a double pump. The R4U is available with an electrical vent valve for unpressurized circulation.Features:- Pilot operated unloading valve- Interface - subplate mounting to ISO 5781- 3 pressure stages- 2 vent valve functions- 3 adjustment modes: - hand knob - acorn nut with lead seal - cylinder lock - http://ph.parker.com/fi/fi/r4u-unloading-valve/026-52361-0