Hy-Pro 0.5 Litre per minute Reversible Pump

0.5 Litre per Minute, 50W , available in 12v or 24v DC

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-Pro Drive 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 valves for positive locking of steering cylinders.
 
The two service ports and reservoir port are positioned at the front of the pump. The threads are G1/4 (BSP) parallel. There is an optional second reservoir port on the top face accessed via a removable plug. If top mounted ports are preferred a kit is available to provide this option.
 
Relief valves to limit the maximum pressure generated are available as a further option.
 
The motors are maintenance free with internal brushes giving typically a 4000+ hour life. The front and rear bearings are sealed ball races for smooth and quiet operation. They have an Ingress Protection rating of IP67. They have a nominal output of 100W with a 50W option on the 12V PR+10 pumps.
 
The pumps are sealed on the driven gear journal allowing the motor to be removed without air entering or oil loss from the hydraulic circuit.
 
Application
 
Designed specifically for the marine autopilot market they are used by the worlds leading autopilot manufacturers. They can be used with balanced or unbalanced cylinders and are suitable for use in pressurised reservoir systems.
 
Features

• Quiet and smooth operation
• Low power consumption
• Zero back drive check valves
• 6 flow options
• 100W motors on 1.0-2.5 litre models
• 50W motor on 0.5-0.8 litre models
• 12V/24V DC motor options
• Relief Valve option
• Port position options
• Compact
• Easy installation
• G1/4 (BSP) parallel ports
• NPTF and M10 adapter kits available
• Service kits available
• Cylinders and hose kits supplied to suit
• Fully compliant to the Recreational Craft Directive
• Supplied with EU Declaration of Conformity

Autopilot Selection Guide:

It is important to select the correct size of pump as it directly influences the ability of the autopilot to steer the vessel. If the pump is too large, the vessel may over steer and will use more power; if it is is too small then the autopilot may struggle to maintain a course.

“Hard Over Time” is the time that the pump takes to drive the rudder from port to starboard. An autopilot drive perferably gives a “Hard over time” of 10 to 14 seconds unless otherwise specified by the autopilot manufacturer. The type of vessel to be steered must be considered as the “Hard over time” may be faster on lightweight planing craft / modern yachts and slower on displacement power boats/ long keel yachts.

To use the table in our product pictures, you will need to know the volume of your steering cylinder, then select the "Hard over time" that you require. Follow the column down until you approximately match your cylinder volume and then select the pump on that row. If your cylinder has a smaller volume then it will have a faster “Hard Over Time”, but if it is larger, it will have a slower “ Hard Over Time”.

In the Box

0.5 Litre per Minute 24v DC Reversible Pump