- Info
- Specification
- performance
- Downloads
|
The P180 Janus axial piston pumps are designed for operation on tap water and are available in displacements of 135cc/rev, 180cc/rev & 225cc/rev. The maximum operating pressure of the unit is 80 bar (1160 PSI) and is available in 3 port boosted design with a direction of rotation anticlockwise viewed on the pump shaft. To avoid any contamination the Janus axial piston pumps are completely oil free and operate with water as their coolant / lubricant. |
Mechanical seals are advised for constant duty applications or duty above 2500 hours between service intervals.
| Displacement (cc/rev) | Max: | 225 |
| Min: | 135 | |
| Max. RPM | Boosted: * | 2000 |
| Max. Input Power (kW) | 114 | |
| Max. Water Flow (m³/hr) | 25.80 | |
| Max. Cont. Pressure (Barg) | 80 | |
| Weight (kg) | 82 | |
| Temperature (°C) | Max: ** | 50 |
| Min: *** | 2 |
* Pump speeds above Max. RPM are possible under higher boost conditions, consult TWHC for details.
** Higher temperature operation is possible, consult TWHC for details.
*** Consult TWHC for lower temperature conditions.
PDF or Portable Document Files can be opened in many readers such as Chrome or Adobe PDF Reader.
STEP files can be used in many 3d packages, such as Solidworks, Autocad 3d or even Blender.
- Info
- Specification
- performance
- Downloads
|
The P180 Janus axial piston pumps are designed for operation on tap water and are available in displacements of 135cc/rev, 180cc/rev & 225cc/rev. The maximum operating pressure of the unit is 80 bar (1160 PSI) and is available in 3 port boosted design with a direction of rotation anticlockwise viewed on the pump shaft. To avoid any contamination the Janus axial piston pumps are completely oil free and operate with water as their coolant / lubricant. |
Mechanical seals are advised for constant duty applications or duty above 2500 hours between service intervals.
| Displacement (cc/rev) | Max: | 225 |
| Min: | 135 | |
| Max. RPM | Boosted: * | 2000 |
| Max. Input Power (kW) | 114 | |
| Max. Water Flow (m³/hr) | 25.80 | |
| Max. Cont. Pressure (Barg) | 80 | |
| Weight (kg) | 82 | |
| Temperature (°C) | Max: ** | 50 |
| Min: *** | 2 |
* Pump speeds above Max. RPM are possible under higher boost conditions, consult TWHC for details.
** Higher temperature operation is possible, consult TWHC for details.
*** Consult TWHC for lower temperature conditions.
PDF or Portable Document Files can be opened in many readers such as Chrome or Adobe PDF Reader.
STEP files can be used in many 3d packages, such as Solidworks, Autocad 3d or even Blender.
Materials
Construction can be modified to suit use, environment and duty thereby, ultimately offering the most cost effective solution. The two basic forms are;
- Duplex Build, bar stock Duplex 2205 material (no cast components) used throughout all water contacting parts, giving the highest possible corrosion resistance for extreme salt concentrations.
- Hybrid Build, components are manufactured in 316 L stainless steel with strategic internal parts i.e. bearing surfaces, in bar stock Duplex 2205.
Minimal pulsation is experienced with these units due to the multiple piston design and the high operational speeds. Accurate flow metering is simply achieved with the control of the output shaft speed. For integral energy recovery version please see our Janus Power Centre catalogues or consult TWHC.
We would advise all desalination pumps are flushed on a routine basis. Any period of non operation (short or long) the system must run on permeate to ensure the sea water is flushed from the system. Even with the adoption of such high grade corrosion material, we would advise a weekly (if not sooner) fresh water flushing regime is undertaken especially if the system will be non-operational for any period.
Inlet Conditions 3 Port Design
The 3 port boosted pumps are designed for pressurised feed water supply at a minimum of 2.5 bar by either an external boost pump, very high pressure water main or a head /column of water in excess of 25m in height .The 3 port design separates the feed water from the pump internal leakage water which must be piped away to a low pressure sump or drain. The advantages of this design are;
- The pump drive must only produce the differential pressure i.e. for a system with 5 bar feed pressure, 60 bar system pressure the pump drive is only required to produce equivalent of 55 bar.
- As the feed pressure and internal leakage are separated, the mechanical shaft seal will not see the full feed pressure therefore reducing required maintenance as low casing pressure will prolong the mechanical seals life and prevent low pressure cavitation issues; the minimum casing pressure and maximum inlet pressure is desired.
A minimum positive inlet pressure of 2.5 bar above casing ‘T’ pressure is required at all times. The desalination pumps can rotate anti-clockwise viewed on pump shaft.
Motor Pump Assemblies
A standard range of bell housings and couplings are available for connecting the pumps to the B5 electric motor flange. See our Desalination Motor Pump Assembly datasheet for further information on potential combinations. The pumps are not capable of operating with induced axial or radial loads on the output shaft; always adopt the use of a 3 part gear style coupling where possible. If the drive shaft/spigot location is within 0.05mm concentricity, direct inline drive assemblies are permissible.
Temperature
The units will generate full performance from 2°C to 50°C. For operation above 50°C is possible however, the volumetric efficiency of the unit will be affected. Consult TWHC and specify the maximum operating temperature.
Filters
All incoming water to the pump must be pre-filtered to a nominal rating of 5µm with a filter element rating of β10 = 75 or better. Pump feed pressure must be a minimum of 2.5 bar measured after filtration. We advise a protection switch is utilised at the pump inlet to shut down the system if feed pressure falls below this minimum.