PR+ RU Reversing DC Hydraulic Power Unit with reservoir and clutch
Reversing type gear pumps driven by 12 or 24 volt DC permanent magnet motors. Incorporated in the design are pilot operated check valves that prevent the pump being back driven by the manual steering system or rudder load. The motors have an IP67 rating and can be removed from the pump without allowing air into the hydraulic system or fluid to escape. They can be used with both balanced and unbalancedcylinders. The pumps incorporate a fluid reservoir plus an unloading solenoid to allow the steering cylinder to ‘float’ when not in autopilot mode.
When used in conjunction with a cylinder of your choice it forms a linear actuator to enable secondary steering via an autopilot.
Voltage: 12 / 24 VDC
Typical amp-hour Typical current
Current: 5 bar at 25% duty Intermittent 55 bar max
12v 24v 12v 24v
PR+RU 06 0.9A - 9.0A -
PR+RU 08 1.3A - 14.0A -
PR+RU 10 2.2A 1.0A 19.0A 9.0A
PR+RU 15 2.4A 1.2A 24.0A 11.0A
PR+RU 20 2.5A 1.3A 25.0A 12.0A
PR+RU 25 2.7A 1.4A 34.0A 15.5A
Ingress Protection: IP67
EMC Protection: BS EN 60945:2002 (DC)
Ignition protection: BS EN 28846:1993
Ambient operating temperature: -15 to +55 deg C
Max Pressure: 55 bar (intermittent operation)
Reservoir Capacity : 107cc at midships
Max heel Angle: 60°
Ports A = Cylinder port G1/4 (BSP) Parallel
B = Cylinder port G1/4 (BSP) Parallel
Filler / Breather G1/2 (BSP) Parallel
Rotation Red lead to positive - Pressure to A port
Hoses Suitable for working pressure 55 bar.
Minimum burst pressure 100 bar.
Fluid ISO VG10 to VG40 Hydraulic mineral fluid
meeting ISO 6743-4 HV
The following commercial fluids are suitable.
Fuchs Renolin B15 HV1