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Sandwich Valves

Check Valves

Check valves from the Parker Manapak series CM are sandwich plate valves designed for stacking beneath a directional valve with a standardised mounting pattern.

Depending upon the function required. One or two check valves are arranged in ports P, T, A and B. Number and flow direction are indicated with letter codes.

The valve bodies are made of steel, eight options for the arrangement of the check valve in the body offer a multitude of uses for hydraulic switching. If switching must be changed, the locating pin can be swapped and the function changed by turning the valve.

Pressure Reducing Valves

Series PRDM are direct operating pressure reducing valves to regulate pressure in one are of a hydraulic circuit at a predetermined level below normal system pressure. Additionally, an integral pressure relieving function for the secondary reduced pressure circuit is incorporated into the design.

Pressure Relief Valves

The pilot-operated pressure relief valves from the Parker Manapak series RM are sandwich plate valves designed for stacking beneath a directional valve with a standardised mounting pattern. Depending upon type, pressure limiting can always be achieved in Ports P, A, or B with unloading always taking place at T.

RM valves may only be mounted in the defined mounting position.

Pressure Compensators

2-way pressure compensators, series LCM are sandwich plate valves designed for stacking beneath a proportional directional control valve with a standardised mounting pattern.

The valve maintains a constant pressure differential between ports P and A or P and B across the directional valve. When the cross-sectional opening of the directional valve is held steady, a constant volume flow rate is achieved, regardless of consumer load fluctuations.

The control pressure applied to the spring side of the compensator spool is supplied from port A or B via a shuttle valve. Flow rate regulation is automatically effective in the port with the highest pressure.

Rotec offer quality design, build, installation and maintenance of hydraulic, pneumatic and electronic components and systems in the aerospace, agriculture, industrial, marine, transport and utilities sectors throughout the UK and internationally.

Head office: +44 (0)1823 348900

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