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Relief Valves

RELIEF & UNLOADING VALVES FOR PIPE LINE MOUNTING

RQ5 & RQM5

Flows to 250 l/min


 


Pressures up to 350bar


Duplomatic pilot operated relief valves comprise a main spool, the position of which is controlled by a pilot pressure signal. As the system pressure rises the valve will lift & relieve just enough to maintain the required pressure setting. The unloading feature is activated by electrically operating a solenoid valve to exhaust the control pressure.
 

 

 

ADVANTAGES


DIRECT OR PILOT OPERATED

Relief valves can be direct or pilot operated with manual pressure adjustment.

UP TO THREE SOLENOID SELECTABLE PRESSURES SETTINGS

Units can be supplied with three position solenoid valves to signal three different pressure settings.

ELECTRICAL UNLOADING OPTION

Valves can be supplied with electrical unloading facility.

BSP 'INLINE' PIPELINE MOUNTING

Units are supplied bottom entry port pressure line.

Ordering

D-CD1W


D-RM2-W

D-RM3-W


D-RQ5-W

D-RQM5-W

Description

Relief valve 0-350 bar pipeline
mount. Max flow 3 lpm, 1/4" NPT.

Relief valve 0-350 bar pipeline
mount. Max flow 50 lpm, 3/8" BSP.

Relief valve 0-350 bar pipeline
mount. Max flow 75 lpm, 1/2" BSP.

Relief valve 0-350 bar pipeline
mount. Max flow 250 lpm 3/4" BSP.

Relief valve 0-350 bar with solenoid
unloading, pipeline mount. Max flow
250 lpm, 3/4" BSP.

Temperature

Oil temperature should be between +30ºC & +60ºC during normal operation. Oil life is greatly reduced if temperature exceeds 60ºC. As a general rule, oil life is halved for each 8ºC temperature exceeds 60ºC.

Filtering

It is necessary to keep the level of contamination within a hydraulic system at an acceptable level to ensure trouble free operation. Filtration should always be specified at a level that protects the most sensitive item or component in the system.

 

 

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