Is there any special purpose for screw pumps?
The twin screw is operated by two screw and screw jacks by gear drive. It is usually used in a clean medium or a mixture of medium, such as oil tanker unloading and cleaning, oil and gas transportation.
Single screw is a bit like meat grinder, is the metal rotor and rubber stator interlocking work, generally used in high viscosity, medium complex environment, such as sludge, coal slurry, jam and other transportation
Common screw pump inside also single and triple screw
