Which good to buy metering pump, screw pump shaft seal, the general use of mechanical shaft seal, according to the level of working pressure can be used in different forms. Screw pump is widely used to transport water, wet mud and flocculant solution in wastewater treatment plants because of its variable flow rate, strong self-priming capacity, reversibility and liquid containing solid particles. The selection of screw pump should follow the principle of economy, rationality and reliability.

Selling metering pump company, if the design selection is not considered carefully, it will bring trouble to the future use, management and maintenance. Therefore, according to the actual needs of production, choosing a reasonable and reliable screw pump can not only ensure the smooth production, but also reduce the maintenance costs. Compared with low speed pump, high speed screw pump can increase flow and head, but its power increases obviously.

At high speed, the abrasion between rotor and stator will accelerate, which will inevitably lead to premature failure of screw pump. At high speed, the length of stator is short and easy to be worn, thus shortening the service life of screw pump. Using reducer or stepless speed regulation mechanism to reduce the speed and keep the speed below 300 rpm is a reasonable range, which is several times longer than the high-speed operation life of screw pump.

Solid debris in the mud will damage the rubber stator of screw pump, so it is very important to ensure that debris does not enter the pump cavity. Many sewage plants have installed crushing devices in front of the pump, and some have installed grid devices or filters to block debris in the screw pump. It is necessary to ensure that the grid is removed in time to avoid blockage. In the case of broken material screw pump must not run.

Once the material is broken, the rubber stator will burn out due to dry friction and high temperature. Therefore, the smoothness of the crusher and the grid is one of the necessary conditions for the normal operation of the screw pump. Therefore, some screw pumps have also installed a material breaking and shutdown device on the pump. When the material is broken, because the screw pump has a self-priming function, a vacuum will be generated in the cavity, The vacuum device will stop the screw pump.