Screw pump is a kind of positive displacement pump used to transport viscous, high-viscosity and corrosive liquids, also known as screw pump. Screw pump consists of a stator with spiral shape and an internal rotating rotor. The pressure difference between the inlet and outlet of the pump causes the fluid to be sucked into the pump from the inlet, and then the fluid is transported from the suction end of the pump to the outlet of the pump under the action of the rotating screw.

Screw pump has many advantages, such as:

It can transport media with high viscosity and solid particles, and is suitable for transporting various liquids.

The volume of the conveying fluid is stable, and the flow rate of the pump is in direct proportion to the rotational speed, and it is basically unaffected by the pressure and density of the fluid.

stable operation, low noise, low vibration, low shearing force on the conveyed medium, and excellent stability for the medium with high viscosity and easy deterioration.

there is no pulsation in liquid flow, and the conveying flow is stable.

The screw pump has good sealing performance and can work under high pressure.

it can run in reverse direction and has self-priming ability.

The disadvantage of screw pump is that

it has poor adaptability to gas and volatile liquid.

the application scope is limited, and special media such as high temperature and high pressure cannot be transported.

the structure of the pump is complicated and the manufacturing cost is high.

Because the clearance between the rotating screw and the stator is small, it is easily affected by impurities such as particles in the fluid, which easily leads to blockage and wear of the pump.

generally speaking, screw pump has unique advantages in conveying high-viscosity and corrosive liquids, and is widely used in chemical industry, petroleum, food, pharmacy and other fields.