GNF Screw Pump
Positive Displacement Pump for Viscous Media
The GNF Screw Pump is a positive displacement pump designed for handling viscous, shear-sensitive, and solid-laden media in chemical, food, and pharmaceutical industries. It provides constant flow regardless of pressure.
Product Specifications
| Flow Rate | 1 - 200 m³/h |
|---|---|
| Pressure | 0.6 - 2.5 MPa |
| Power | 1.1 - 45 kW |
| Speed | 200 - 1000 rpm |
| Casing Material | Cast Iron / Stainless Steel |
| Rotor Material | Stainless Steel |
| Stator Material | NBR / EPDM / FKM |
| Max Temperature | 100 °C |
| Viscosity Range | 10 - 50000 cSt |
| Seal Type | Mechanical Seal |
| Standard | Industrial Standard |
Product Description
The GNF Screw Pump is a general-purpose single screw pump (progressive cavity) designed for viscous and abrasive fluid transfer in industrial and chemical applications. Its robust construction handles flow rates from 1 to 200 m³/h at temperatures to 100°C, with configurable rotor and stator materials for different fluid chemistries. The pump provides gentle, shear-sensitive handling with constant output, suitable for sludge, pastes, creams, and chemical solutions requiring reliable positive displacement delivery.
Applications
- Sewage sludge transfer
- Chemical slurry
- Food waste processing
- Paper stock
- Mining tailings
- Industrial wastewater
Quality Assurance
All GNF Screw Pumps are manufactured under ISO 9001 quality management system. Each pump undergoes rigorous testing including hydrostatic pressure test, performance test, NDT inspection, and dynamic balance verification before shipment. We provide comprehensive documentation including test reports, material certificates, and operation manuals.
Why Choose Our Positive Displacement Pumps
GNF Screw Pump Technology
General-purpose screw pump with robust design for industrial fluid transfer, combining positive displacement reliability with simple maintenance.
Constant Flow Output
Flow rate directly proportional to rotational speed, independent of discharge pressure, providing accurate and repeatable delivery for process control.
Self-Priming Capability
Strong suction lift up to 5-6 meters, with ability to run dry intermittently without damage, suitable for tank unloading and transfer.
Low Shear Pumping
Gentle screw action preserves product integrity, suitable for shear-sensitive chemicals, polymers, and food-grade products.
Key Features
Frequently Asked Questions
What does GNF stand for in GNF screw pump?
What fluids are GNF screw pumps suitable for?
How does a progressive cavity screw pump work?
What is the maximum pressure for GNF screw pumps?
Selection Guide
✅ When to Choose This Pump
- High viscosity fluids (above 500 cP)
- Hygienic food and beverage products
- Precision metering and dosing
- Shear-sensitive products
⚠️ When NOT to Choose
- Large volume low-viscosity transfer
- Abrasive slurries with large particles
- High-pressure water injection
- Applications requiring variable flow at constant speed
💡 Common Selection Mistakes
- Not installing pressure relief valve
- Running at too high speed for viscosity
- Ignoring shear sensitivity of product
- Not considering pulsation dampening
Still unsure? Use our Pump Selection Center → or talk to our engineers →
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