1. Performance advantages of screw pump:
1) good absorbability, good self-absorption ability;
2) continuous and uniform flow, low noise, small vibration, wide range of liquid transport and viscosity;
3) high speed can be used because the inertia force of the rotating parts in the pump is low;
4) wider pressure and flow range. The pressure range is about 3.4 to 340 kilograms force /cm2, and the maximum flow rate can reach 18600cm3/ min;
5) solid structure, easy to install and maintain.
6) less sensitive to incoming gas and dirt than other rotary pumps;
2. Disadvantages of screw pump: the performance of the pump is sensitive to the viscosity change of the liquid. The machining and assembling requirements of screw pump are higher;
3. Features of the screw pump:
1) the speed is proportional to the speed of the speed. The screw pump can carry forward and reverse.
2) the volumetric cavity formed by elastic stator can effectively reduce the abrasion of conveying solid particles.
3) the volume of the fluid in the pump does not change when the fluid flows in the pump.
4) it can realize multi-phase mixing of liquid, gas and solid.
5) input medium viscosity can reach 50000Mpa· S can be up to 50%. The screw sealing line of the stator and rotor will separate the income cavity and the discharge cavity completely, so that the pump has the partition function of the valve.
The screw pump has the following advantages:
1. Compared with the screw pump and the gear, the screw pump can deliver high viscosity material.
2. Unlike the plunger pump, diaphragm pump and gear pump, the screw pump can be used to fill and measure the agent.
3. Compared with the centrifugal pump, the screw pump does not need to install the valve and the flow is a steady linear flow.
4. Compared with the diaphragm pump, the screw pump can carry various kinds of mixed impurities containing gas and solid particles or fiber media, as well as various corrosive substances.
5. Compared with plunger pump, the screw pump has strong self-absorption capacity and high suction height.
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