Three-Screw Pump
The MK FLOW Three-Screw Pump is a positive displacement rotary pump designed for smooth, pulse-free, and quiet transfer of lubricating, non-abrasive fluids at high pressures and moderate flows. Engineered with axial flow geometry, this pump is widely used in hydraulic systems, lubrication circuits, fuel injection, and thermal oil heating applications.
Its robust design, high volumetric efficiency, and long service life make it ideal for continuous-duty operations.
⚙️ Working Principle
The three-screw pump consists of a driving screw (power rotor) and two intermeshing idler screws (idler rotors). The screws are tightly housed within a close-clearance barrel. As the screws rotate, fluid is drawn into the pump and moved axially in a sealed chamber toward the discharge end. The fluid motion is continuous and without pulsation, making it suitable for precise, noise-free systems.
📊 Technical Data
| Parameter | Specification |
|---|---|
| Pump Type | Triple-Screw Rotary Positive Displacement |
| Flow Rate (Q) | Up to 200 m³/h |
| Pressure Range | Up to 100 bar (1450 psi) |
| Viscosity Range | 10 to 10,000 cSt |
| Temperature Range | Up to 250°C (with heating options) |
| Speed | Up to 3600 RPM |
| Suction Lift | Up to 6 meters (priming required for dry start) |
| Seal Type | Mechanical Seal / Gland Packing / Cartridge Seal |
| Mounting Configuration | Horizontal (baseplate-mounted) |
| Drive Type | Motor Coupled via Flexible Coupling or Gearbox |
🔩 Material of Construction (MOC)
| Component | Material Options |
|---|---|
| Casing | Cast Iron / SG Iron / SS304 / SS316 |
| Screws | Nitrided Steel / Case-Hardened Alloy Steel |
| Shaft | High Tensile Steel / Stainless Steel |
| Bearings | Ball / Sleeve Bearings |
| Seal Faces | Carbon/Ceramic, Sic/Sic, PTFE |
| Gaskets | Nitrile / Viton / PTFE |
🏭 Applications
- Lubrication Systems – Gearbox, turbine, compressor lube oil
- Fuel Oil Transfer – Furnace oil, diesel, LDO, HFO
- Thermic Fluid Circulation – Hot oil applications
- Hydraulic Systems – Servo systems, press machines
- Polymer & Chemical Transfer – Non-abrasive viscous media
- Marine Industry – Fuel injection, steering systems, engine lubrication
✅ Conclusion
The MK FLOW Three-Screw Pump delivers precise flow control, ultra-quiet operation, and high-pressure performance for industrial and marine systems requiring reliable fluid transfer. With its smooth axial delivery, low maintenance requirements, and long operating life, it’s the preferred solution for lubrication, fuel, and thermal applications.