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The P30 Janus axial piston motors operate on tap water and come in two displacement options: 23.0 cc/rev and 35.0 cc/rev.
These motors handle a maximum operating pressure of 160 bar (2320 PSI). You can choose between a 2-port un-boosted design or a 3-port boosted design, both available with either clockwise or anticlockwise rotation when viewed from the pump shaft.
To prevent contamination, Janus axial piston motors use water as both a coolant and lubricant, eliminating the need for oil entirely.
Use mechanical seals for constant duty applications or when service intervals exceed 2,500 hours
| Displacement (cc/rev) | Max: | 34.6 |
| Min: | 30.0 | |
| RPM | Max: * | 4000 |
| Min: ** | 500 | |
| Construction Materials | A.I.S.I 316, Polymer & Martensitic Stainless steel | |
| Max. Input Power (kW) Cont | 31 | |
| Max. Input (l/min) Cont | 132 | |
| Max. Cont. Pressure (Bar) | 160 | |
| Weight (kg) | 10 | |
| Temperature (°C) | Max: | 50 |
| Min: *** | 2 |
* Contact TWHC to discuss higher operating speeds. ** Refer to the gearbox note for additional information. *** Speak with TWHC about the antifreeze option and operation in lower temperature conditions.
You can open PDF (Portable Document Format) files using many readers, including Chrome and Adobe PDF Reader.
You can use STEP files in various 3D software packages, such as SolidWorks, AutoCAD 3D, and even Blender.
- Info
- Specification
- Performance
- Download
The P30 Janus axial piston motors operate on tap water and come in two displacement options: 23.0 cc/rev and 35.0 cc/rev.
These pumps handle a maximum operating pressure of 160 bar (2320 PSI). You can choose between a 2-port un-boosted design or a 3-port boosted design, both available with either clockwise or anticlockwise rotation when viewed from the pump shaft.
To prevent contamination, Janus axial piston motors use water as both a coolant and lubricant, eliminating the need for oil entirely.
Use mechanical seals for constant duty applications or when service intervals exceed 2,500 hours
| Displacement (cc/rev) | Max: | 34.6 |
| Min: | 30.0 | |
| RPM | Max: * | 4000 |
| Min: ** | 500 | |
| Construction Materials | A.I.S.I 316, Polymer & Martensitic Stainless steel | |
| Max. Input Power (kW) Cont | 31 | |
| Max. Input (l/min) Cont | 132 | |
| Max. Cont. Pressure (Bar) | 160 | |
| Weight (kg) | 10 | |
| Temperature (°C) | Max: | 50 |
| Min: *** | 2 |
* Contact TWHC to discuss higher operating speeds. ** Refer to the gearbox note for additional information. *** Speak with TWHC about the antifreeze option and operation in lower temperature conditions.
You can open PDF (Portable Document Format) files using many readers, including Chrome and Adobe PDF Reader.
You can use STEP files in various 3D software packages, such as SolidWorks, AutoCAD 3D, and even Blender.
PORT CONFIGURATIONS
- All connections are BSPP
- Only use parallel threads with high pressure sealing washers
- Do not use taper fittings
2 Port Configuration
Axial piston motors come in a 2-port, unidirectional configuration. The P (pressure) inlet and T (tank return) line are clearly marked on the port end cover. Always connect these lines correctly—reversing them can cause catastrophic failure.
Unidirectional Motor
Maximum Pressure in the motor return line is 2.5 bar.
3 Port Configuration
All axial piston motor sizes can be supplied for bi-directional rotation. In this case, the 3-port design includes an additional case drain port labeled T. By alternating the pressure inlet and return ports, you can reverse the motor shaft’s direction. Furthermore, both pressure ports on the 3-port design can handle full system pressure. Finally, you can adjust motor performance by controlling both the flow and pressure of the return flow.
Bi-Directional Motor
Pressure in the return line on a bi-directional motor must be greater than the pressure in the leakage port. The leakage port has a maximum pressure of 2.5 bar.
Geared Motor Assemblies
TWHC offers a standard range of epicyclic gearboxes for operation below the recommended minimum speed.
Temperature
These axial piston motors deliver full performance within a temperature range of 2°C to 50°C. For conditions below freezing, you can use an environmentally friendly antifreeze—ask for the Monopropylene Glycol datasheet. While operation above 50°C is possible, it may reduce the unit’s volumetric efficiency. To ensure optimal performance, consult TWHC and specify your maximum operating temperature.
Filters
All incoming water to the pump must be pre-filtered to a nominal rating of 10µm (25µm absolute) with a filter element rating of β10 = 75 or better. Return line filtration is advisable on closed loop systems. High pressure filtration may also be considered but as these are manufactured in stainless steel, we consider this an expensive option.
Shaft Loading
Avoid applying radial or axial loads to the motor output shaft. Instead, use a flexible gear coupling whenever possible to prevent damage and ensure reliable operation.
Start Torque
Smaller axial piston motors (M3 and M6) need at least 25 bar of pressure to rotate an unloaded shaft. In comparison, larger motors typically start at pressures above 12 bar. If your application requires the motor to start under full load, make sure to size the motor based on its starting torque. For accurate calculations, use 60% of the dynamic torque values shown in the performance graphs as the starting capacity.
Operation
It is advised the motors are operated on a monthly basis to ensure the maximum starting torque is maintained.
Over Run
On applications where the motor shaft will continue to rotate once the control valve is closed; over run check valves must be incorporated. For further information on assemblies, please consult TWHC.
ATEX
Atex approved to comply with regulations of Directive 94/9/EC (ATEX) for equipment or protection systems intended for use in potentially explosive atmospheres. Product group, category, zones: II 2GD ck T6 T85°C +1°C≤TA≤+40°C.
Fluid
Use drinking water that meets the EEC Directive 98/83/EC as the standard operating fluid. If you’re unsure about the water quality, consult TWHC for advice. The standard product also performs well with technical water—such as distilled, reverse osmosis (RO), or demineralised water. However, depending on the operating environment, you may need to change the seal material or construction.
Motors can also run on non-flammable fluids like Glycol 95/5 mixtures. When using these fluids, make sure to adjust the internal clearances to maintain proper performance. Always specify the exact operating fluid in all enquiries and orders to ensure compatibility and reliability.
The standard construction supports operation with seawater. However, due to the fluid’s higher corrosion potential, long-term use may require a more noble material construction.