Duplomatic Unloading Valve For Circuit With Accumulator, Type RQ**-P

Brand :
Duplomatic

Duplomatic Unloading Valve For Circuit With Accumulator, Type RQ**-P - Unloading valve for circuit with accumulator

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Description

RQR3-P, RQR5-P, RQR7-P, RQA5-P and RQA7-P are automatic unloading valves for subplate mounting. These valves are specific for circuits with accumulator, to optimize the energy consumption of the pump when the accumulator has reached the expected pressure level. They act deviating all the pump flow to the tank when the pressure value adjusted by the screw is reached, until the pressure in the working line B drops to a percentage (63% or 75%, depending by the version) of the set pressure. Then, the pump flow to the circuit is restored by means of the check valve until set pressure is reached again. RQA5-P and RQA7-P are already equipped with the check valve. Instead, RQR3-P, RQR5-P and RQR7-P have a X port for a pilot signal from a remote check valve. Three pressure control ranges up to 280 bar are available, adjustable by a hexagonal head screw. Upon request they can be equipped with a SICBLOC adjustment knob. The absence of the accumulator, an incorrect pre-charge value or the incorrect calibration of the pressure value on the valve cause valve to switch continuously creating sudden pressure surges in the circuit.

Key Features

• Max Working Pressure is 350 bar • Max Flow Rate is RQR3: 200 l/min, RQR5: 400 l/min, RQR7: 500 l/min • Adjustment Type is Hex screw or SICBLOC knob • Mounting Type is Subplate ISO 6264 • Accumulator Use is Yes (unloading valve with check valve optional) • Pressure Adjustment Range is Up to 280 bar

Downloads

Datasheet_RQ__-P.pdf

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Specifications

Max Working Pressure
350 bar
Max Flow Rate
RQR3: 200 l/min, RQR5: 400 l/min, RQR7: 500 l/min
Adjustment Type
Hex screw or SICBLOC knob
Mounting Type
Subplate ISO 6264
Accumulator Use
Yes (unloading valve with check valve optional)
Pressure Adjustment Range
Up to 280 bar
Mass
RQR3: 3.5 kg, RQR5: 4.3 kg, RQR7: 6.5 kg
Surface Compatibility
ISO 6264-06/08/10 CETOP
Fluid Temperature Range
-20°C to +80°C
Ambient temperature range
-20°C to +60°C
Fluid Viscosity Range
10 ÷ 400 cSt
Recommended viscosity
25 cSt

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