I believe that many customers in the purchase of delivery pump, will be in the tangle of screw pump or rotor pump? With positive displacement pump, are suitable for conveying materials with viscosity, what is the difference between the two? Today, let's take you to understand.

First of all, to give you a brief introduction to the structure of the two delivery pumps.

Screw pump pump body is composed of stainless steel metal rotor and rubber stator, stator friction, material is driven by screw pump spiral groove, discharge.

Rotor pump there are two stainless steel shafts, respectively drive two stainless steel rotors, the material from the relative operation of the rotor out. In the process of operation, there is no sliding friction between the two rotors of the rotor pump and the pump body, so as to maintain phase independent operation.

So, what are the differences between the performance of the two pumps?

1, because the rotor pump rotor phase independent working state, so rotor pump basically no wearing parts, the only wearing parts is mechanical seal, but mechanical seal normal operation, with 3-4 years and no problem;

2, the material is discharged through the friction between the stainless steel rotor of the screw pump and the rubber stator, so the rubber stator is easy to wear, especially with particles in the material, will also reduce the life of the rubber stator, making the screw pump stator needs to be frequently replaced;

3, the whole pump head of the rotor pump and contact parts of the material are made of stainless steel, and the screw pump is not, so the cost of the rotor pump is higher than the screw pump;

4, for the food industry, the pharmaceutical industry, the health level are higher requirements, it is recommended to choose the rotor pump.