G-Type Screw Pump for Viscous Fluids The G-type screw pump is a positive displacement pump specifically designed to handle viscous, abrasive, or shear-sensitive fluids efficiently. Its robust construction and unique screw mechanism make it ideal for applications in industries such as oil and gas, food processing, chemical manufacturing, and wastewater treatment. Design and Working Principle The G-type screw pump features a single-rotor screw (spindle) that rotates within a double-internal helical stator made of elastomeric material. As the rotor turns, it creates sealed cavities along the stator, progressively moving the fluid from the suction side to the discharge side. This design ensures smooth, pulsation-free flow with minimal turbulence, making it suitable for shear-sensitive fluids like polymers, syrups, or heavy oils. Key Advantages 1. High Viscosity Handling – The pump excels in transferring thick fluids (up to millions of centipoise) without requiring excessive pressure or speed adjustments. 2. Self-Priming Capability – It can evacuate air and prime itself, reducing the need for additional priming systems. 3. Low Shear Operation – The gentle pumping action prevents degradation of sensitive fluids, maintaining product integrity. 4. Reversible Flow – The direction of rotation can be reversed, allowing for backflushing or bidirectional pumping. 5. Minimal Maintenance – With only one moving part (the rotor), wear is reduced, leading to longer service intervals. Applications - Oil & Lubricants: Transferring heavy crude oil, bitumen, or grease. - Food & Beverage: Pumping chocolate, honey, or dough without altering texture. - Chemical Processing: Handling adhesives, resins, or solvents. - Wastewater Treatment: Moving sludge or thick slurries. Considerations While highly efficient, G-type screw pumps require proper material selection (stator elastomer compatibility) and speed control to avoid excessive wear when handling abrasive fluids. Regular inspection of the stator and rotor is recommended to maintain optimal performance. In summary, the G-type screw pump is a versatile, reliable solution for viscous and delicate fluids, offering smooth operation, durability, and adaptability across multiple industries.