Comparison between gear pump and screw pump: both are positive displacement pumps, so their performance is basically similar - they can stably transport high viscosity substances and have high delivery pressure. However, the screw pump has one of the biggest shortcomings, which determines its inapplicability - its short service life is determined by the non streamlined surface of the screw pump and numerous defects in the chamber. However, the screw pump can transport high concentration liquid, while the gear pump can not.
Features of gear pump: long service life: there is a certain clearance between the two wheels, without friction and wear. There is no contact between the rotor and the rotor. There is no wear and tear after long-term use. The rotor operates smoothly, with low noise and high efficiency. Wide range of application: it is an ideal product to replace screw pump for conveying medium with high viscosity, concentration and particles. The pump is a positive displacement pump. The delivery flow can be controlled accurately and can be easily made into a variable displacement pump. The output flow of the centrifugal pump can not be controlled, and it will decrease with the increase of the resistance; The pump has strong self-priming capacity, and the self-priming distance is more than 5m, while the screw pump has almost no self-priming performance.
