The ZPU 08/14/24 is an electric grease pump series rated at 40 MPa for dual-line and single-line central lubrication networks. Each unit is a single-outlet plunger pump serving plants with long pipe runs and many lubrication points. Three models cover different delivery rates and reservoir sizes, all on 380V three-phase AC. For a DC or single-phase AC pump, see the electric operated grease pump page; for another 40 MPa series in fixed or mobile station form, see the DRB-P electric grease pump page.
ZPU Series at a Glance
The ZPU series is a 40 MPa (400 bar / 5,800 PSI) single-outlet plunger pump for dual-line and single-line dry-grease central lubrication. A geared motor drives the plunger pair, an integrated agitator conditions the grease, and a steel reservoir feeds it. A safety valve fixed at 410 bar protects the network.
Model Range and Specifications
Three models share the 40 MPa rating, differing in delivery rate, reservoir, motor power, and weight; all run on AC 380V 50/60Hz with a steel reservoir and agitator.
| Model | Delivery Rate | Reservoir | Motor | Weight |
|---|---|---|---|---|
| ZPU-08G | 133 ml/min | 40 L | 0.37 kW | 76 kg |
| ZPU-14G | 233 ml/min | 60 L | 0.55 kW | 84 kg |
| ZPU-24G | 400 ml/min | 100 L | 1.10 kW | 92 kg |
A filter of 5.1 cm2 at 280 micron protects the pump, which handles NLGI 0 – 3 grease from -20°C to +80°C.
40 MPa Duty and the Built-In Safety Valve
40 MPa (400 bar / 5,800 PSI) is the rated pressure the network is designed around; the actual working point is set by line resistance, grease grade, and temperature. The safety valve is factory-fixed at 410 bar.
Dual-Line and Single-Line System Fit
The ZPU serves dual-line and single-line dry-grease networks. A reversing valve after the pump alternates pressure between the two mains; single-line layouts are fed directly. The central lubrication system overview compares the architectures; direct multi-point feeding on one machine belongs to the DDB multi-point grease pump.
Mobile Lubrication Station Configuration
The ZPU can also be mounted on a wheel-kit trolley with a high-pressure hose and a grease gun to form a mobile lubrication station, suited to cases where fixed piping is not economical: few points, infrequent lubrication, or large single-point volumes on open equipment.
Where the ZPU Series Fits
Typical settings are cement plants, steel works, mining equipment, and power stations with large lubrication networks. Within the grease pump range, the ZPU is the 40 MPa high-pressure source; voltage selection sits on the electric operated page and direct-fed multi-point machines on DDB.
Honest Limits of the ZPU Series
- The standard supply is 380V three-phase AC 50/60Hz; confirm electrical details for other supplies.
- A dual-line network needs a reversing valve after the pump; the valve model is confirmed when ordering.
- The safety valve is fixed at 410 bar with no field adjustment.
- Delivery beyond 120 m assumes the small-bore supply line design; actual distance depends on pipe size, grease, and temperature.
For a quote on a specific model or a mobile trolley configuration, ask about this pump.
Frequently Asked Questions
How does the ZPU series differ from the DRB-P and DDB pumps?
ZPU is the 40 MPa single-outlet high-pressure source for dual-line and single-line networks; DRB-P is another 40 MPa series in fixed or mobile station form; DDB is a 10 MPa multi-point pump feeding one machine directly.
Which of the three ZPU models should I choose?
Match delivery rate and reservoir to the network: 133 ml/min with 40 L (ZPU-08G), 233 ml/min with 60 L (ZPU-14G), or 400 ml/min with 100 L (ZPU-24G).
Can the ZPU drive a dual-line system?
Yes. A reversing valve after the pump alternates pressure between the two mains; the valve model is confirmed when ordering. Single-line networks are fed directly.
What does the 120 m delivery distance mean?
That figure assumes the small-bore supply line design, where a narrower pipe loses less pressure over a long run; real range depends on pipe size, grease grade, and temperature.
Which grease grades does the ZPU handle?
NLGI 0 – 3 grease within a -20°C to +80°C range; colder grease raises flow resistance, so check grade and temperature together.
Can the safety valve be adjusted in the field?
No. The valve is factory-fixed at 410 bar so the network cannot be pushed beyond its design pressure.
Can the ZPU be used as a mobile lubrication station?
Yes. With a wheel-kit trolley, a high-pressure hose, and a grease gun, it becomes a mobile station for points where fixed piping is not practical.
What should I check if the pressure drops below normal?
A working pressure clearly below normal signals a check of the plunger pair and relief valve, following the service interval in the pump documentation.
What should I confirm before ordering?
Confirm the model, the 380V AC 50Hz supply, and whether a mobile trolley is needed. Share the application and grease grade, and get a quote for your ZPU setup.
Who makes the ZPU series?
IsoHiTech Lubrication Systems is a lubrication equipment supplier founded in 2023, engineering since 2006. For a ZPU 08, 14, or 24, or a mobile trolley configuration, send the application details to inquiry@isohitech.com.
