Twin Screw pumps are self-priming, double ended positive displacement pumps with external gears and bearing. The design provides complete axial balancing of the rotating elements and eliminates all metal-to-metal contact within the pump. This feature makes them ideal for dry running for a short period and can be operated at low RPM. The pump is equipped with an inbuilt balance pressure relief valve for safety. Customers can choose to heat the casing either through a heated base or via steam jacketing, depending on their application needs.
Twin screw pumps have two screws mounted and keyed into two shafts – a driving shaft and a driven shaft. The screws are not meshed with each other and as a result these pumps are suitable for dry running applications for short durations. Twin screw pumps have low NPSH requirements, making them low maintenance and suitable for decanting applications.
Model | Nozzle Size (mm) | Flow Rate (m³/h) | Pressure (bar) | |
|---|---|---|---|---|
Suction | Discharge | |||
2 | 40 | 40 | 9 | 10 |
3 | 50 | 50 | 21 | 10 |
4 | 80 | 80 | 39 | 15 |
5 | 100 | 100 | 60 | 20 |
6 | 150 | 150 | 108 | 25 |
7 | 200 | 200 | 210 | 30 |
7T | 250 | 250 | 450 | 30 |
Twin screw pumps are widely used in industries like cement, power, oil & gas, steel, and fertilizer in the following applications:
- Lube oil transfer/circulation/unloading
- Fuel oil handling (Light/Heavy, HSD, LDO, HFO)
- Centralized lubrication systems
- Lubrication of bearings/gears/rolls
- Loading and unloading of oil and chemicals
- Oil recirculation
- Diesel and crude oil transfer
- HFO/LDO/Lube oil transfer
- Separate screw and shaft assembly
- Extremely good suction capability
- Wide variety of materials of construction
- They come with replaceable liners
- Partial/Full heating jacket available in various designs
- Different sealing arrangements possible
- Low NPSH requirement
- Casing available in different cast and fabricated design