Marine Autopilot Hydraulic Steering Components

Hydraulics Engineering Quality and Manufacturing Excellence Who are we? Since 1967 Hydraulic Projects has been designing and manufacturing hydraulic marine autopilot steering equipment and hydraulic control valves from our UK base. With our own in-house design team using the latest 3d software and CNC machines, we control the complete process from initial concept through manufacture, assembly and test. We guarantee the product is manufactured to the very highest quality and delivered on time. What do we do? We manufacture range of marine autopilot hydraulic steering equipment. Additionally, we...

PR+ REVERSING ELECTRO-HYDRAULIC POWER UNIT Backed with over 30 years of continuous development the new PR+ range of reversing pumps presents the ultimate in quiet and smooth operation. Unlike noisy piston pump designs the precision gear form delivers smooth flow in all conditions and with minimal noise. Now with IP67 motors that have a 4000 hour brush life these latest generation of Hy-ProDrive power units are the best available. Description A permanent magnet DC motor driven precision gear pump available with a range of flows from 0.6 to 2.5 L/min. Each pump is fitted with zero-leakage pilot check...

Performance Graphs Typical performance ATF (40 cSt @40°C) @ 25°C

Voltage Current PR+06 25W PR+08 50W PR+10 100W PR+15 100W PR+20 100W PR+25 100W Ingress protection EMC protection Ignition protection Ambient operating temperature Max pressure reservoir line Ports G1/4 (BSPP) Parallel A = cylinder port B = cylinder port R = reservoir port Typical current Intermittent 55 bar max 12V 24V Orientation Hoses Fluid Weight Port adaptor torque Red lead to positive - pressure to A port Black lead to positive - pressure to B port Suitable for working pressure 55 bar. Minimum burst pressure 100 bar. ISO VG10 to VG40 Hydraulic mineral fluid meeting ISO 6743-4 HV Order...

Spares and Accessories PR+ Top Port Adaptor Kit PR+ Port Thread Adaptor Kits Where space is limited or when replacing an existing top ported pump an easy-fit adaptor kit is available for the Hy-ProDrive PR+ pump range. The kit fits all sizes of PR+ reversing pump. Special adaptors are available in sets of 3 Including all necessary seals to convert from the standard G1/4 port to 5/8 SAE , 1/2” NPTF or M10. Other sizes can be made on request. Order Code Order Code G1/4 MALE TO 1/4 NPTF FEMALE Replacement Motor Kits The motors fitted to the PR+, ML+40 and HS+ systems are rated to IP67 and sealed...

It is important to select the correct size pump as it directly influences the ability of the autopilot to steer the vessel. An autopilot drive will need to give a compatible Hard Over to Hard Over time to suit the vessel type (Or as specified by the autopilot manufacturer). The HO to HO may be faster on lightweight planing craft / yachts and slower on displacement power boats / long keel or heavy yachts. Note if the pump is too large, the vessel may over steer and will use more power, too small and the autopilot may struggle to maintain a course. To use the table below you will need to know the...

Description The PR+RU incorporates the proven PR+ reversing pump and motor range but with an integral reservoir and solenoid unloader valve. Complete with pilot check valves this compact unit can be used where the vessel has a mechanical primary steering and an autopilot stand-alone secondary hydraulic drive is required. With just two hose connections, uniquely the unit can be used with balanced or unbalanced cylinders1. The unloader solenoid coil is switched by the course computer clutch connection to engage and disengage the drive. By design the very low back drive loads preserve the feel of...

Circuit Diagram Reservoir capacity Max differential volume (unbalanced cylinder ) 50cc Clutch coil Coil connection Weight Refer page 6 for all other technical data. Installation Dimensions Order Code SZE WITH RESERVOIR MOTOR VOLTAGE UNLESS OTHERWISE

Manufactured specifically for marine autopilot steering applications the versatile PC constant running power units use a heavy-duty fan cooled motor coupled to optional pump sizes to deliver up to 4.5 L/min. Designed to be used for heavy duty applications on larger yachts or commercial craft these units come fitted with pressure compensated flow controls, relief valve and cylinder check valves as standard. Description Once the hard-over time has been set via the speed control, the steering action is achieved by switching a damped heavy duty double acting solenoid valve. The motor and precision...

Installation Details Performance Graphs Typical Performance ATF (40 cSt @40ºC) @ 25ºC Order Code

ML+40 ELECTRO-HYDRAULIC SECONDARY STEERING LINEAR ACTUATOR The ML+40 Electro Hydraulic Linear Actuator combines all the elements of an hydraulic circuit in one compact unit. Designed for ease of installation, the unit is supplied with a quick release mounting, tiller bolt and fitting kit. An optional rudder reference/feedback unit can be mounted directly onto the actuator. Integral relief valves protect the unit and its mountings from being overloaded. The ML+40 combines a hydraulic cylinder, pump, IP67 motor, clutch and reservoir in one powerful and compact unit. To operate the clutch is engaged...

Performance Graphs Typical Performance ISO VG10 @ 25°C Circuit Diagram Technical Data Typical Amp-hour Typical Current 60kg at 25% duty Intermittent 650kg 12V 24V 12V 24V Full stroke time 12 / 24V (no load) ML+4010 ML+4020 Volume (average) Ingress protection EMC protection Ignition protection Ambient operating Temperature Max Operating Thrust Relief valve setting Orientation Red lead to positive - Extend Black lead to positive - Retract Order Code MARINE LINEAR 0 40mm CYLINDER PUMP SIZE Clutch connection DIN 43650 (4-9 mm lead) IP67 Fluid ISO VG10 to VG40 hydraulic Feedback Transducer...

Installation Details

Quadrant Typical installation for an 8.4” ( 213mm) radius with total rudder angle of 70deg.