Screw Pump

Screw Pump Introduction

A screw pump is a type of positive displacement pump that uses rotating screws or augers to move fluid or viscous materials. It is widely used in various industries for pumping liquids with high viscosity, such as oils, sludge, mud, and other thick or sticky substances. Screw Pumps offer several advantages, including self-priming capabilities, high efficiency, and the ability to handle abrasive or shear-sensitive fluids. We also provide Screw-type Pump,Single Screw Pump,Double Screw Pump,Progressing Cavity Pump.

Here are some key points to understand about screw pumps:

• Working Principle: Screw pumps operate on the principle of intermeshing screws or rotors that rotate inside a housing. The rotating screws create cavities that trap and carry the fluid from the pump inlet to the outlet. As the screws rotate, the fluid is displaced along the screw threads and pushed towards the pump discharge.
• Screw Design: Screw pumps typically have two or more screws or rotors that intermesh without direct contact. The screws can have various profiles, such as Archimedean screw, twin-screw, or triple-screw designs. The screw profiles and clearances between the screws and the housing are engineered to provide optimal pumping efficiency and prevent leakage.
• Positive Displacement: Screw pumps are classified as positive displacement pumps because they deliver a fixed volume of fluid for each rotation of the screws. This characteristic makes screw pumps suitable for applications where a consistent flow rate is required, regardless of variations in system pressure.
• Self-Priming: Screw pumps are often self-priming, which means they can evacuate air or gas from the pump suction line and create a vacuum to draw in the fluid. This feature eliminates the need for external priming mechanisms and makes screw pumps suitable for applications where suction lift is required.
• Viscous Fluid Handling: Screw pumps are particularly well-suited for pumping highly viscous fluids. The rotating screws create a gentle pumping action that minimizes shear and agitation, making them suitable for handling shear-sensitive materials or fluids with suspended solids.
• Applications: Screw pumps find applications in a wide range of industries, including oil and gas, wastewater treatment, chemical processing, food and beverage, marine, and power generation. They are used for tasks such as transferring crude oil, pumping sludge or sewage, lubricating machinery, circulating cooling water, and more.
• Maintenance and Operation: Screw pumps generally require regular inspection and maintenance to ensure proper functioning. Maintenance tasks may include checking for wear, monitoring clearances, lubricating bearings, and replacing seals or gaskets as needed. It is also important to operate the screw pump within its specified operating parameters to ensure optimal performance and longevity.