In short, the more parameters, the better, which is beneficial to the selection of the pump. The pump can transport various fluid media, as well as highly viscous media, media containing solid particles, and media containing fibers. For example, ordinary medium sewage and high sludge content, the packing seal form is directly selected, which has good abrasion, easy replacement and low price.. Sealing methods are divided into mechanical seals and packing seals.

Good adjustment performance and high Grinder Sewage Submersible Pumps efficiency. It is widely used in various industries such as sewage, medicine, daily chemical, papermaking, printing, and food. The mechanical seal has a good seal, but it is expensive.　　Single screw pump provides on-site use medium (viscosity of medium, if medium is sludge, provide content) temperature, flow and pressure when selecting with supplier.

The cost is lower than that of a screw pump. When the medium requires no leakage, the mechanical seal should be used. It is also convenient to replace accessories later. If the flow required on site is small, it is recommended to use a mechanical diaphragm metering pump.　　Secondly, after these parameters are determined, the sealing method of the pump is determined according to the medium used on site.　

Single screw pump is a type of positive displacement pump.The above sewage pumps or screw pumps are only made of metal (cast iron, stainless steel), so they are not suitable for some corrosive sewage containing solid particles (when stainless steel is not suitable).In the environmental protection industry or various sewage treatment, sewage pumps play an increasingly important role.

5 Check the leakage of the shaft seal. The operation of the centrifugal pump can be divided into three steps, namely start, run and stop. After the above preparations are completed, the motor can be started. 2 The bearing is filled with oil, the oil level is normal, and the oil quality is qualified. 6 The direction of motor rotation is correct. 3 Open all the inlet 4" Submersible Borehole Pumps valves of the centrifugal pump.

Note that the idle time of closing the valve should not exceed 3 minutes. After everything is normal, gradually open the outlet valve and adjust it to the required working conditions. After the speed is normal, the outlet valve can be gradually opened and adjusted to the required working conditions. After the speed is normal, check the pressure and current and pay attention to whether there is vibration and noise.. Start: The following preparations should be made before starting: 1

Check the integrity of the pump equipment.First, open all the inlet valves, close the outlet valve, and start the motor. 4 Except for water injection into the pump or water diversion of the vacuum pump, open the air release valve to exhaust. A little dripping water is appropriate for the packing seal

This adjustment method can keep the pipeline characteristic curve unchanged.　　2. When the centrifugal pump is working on the designated pipeline, due to changes in production tasks, the working flow of the pump does not match the production requirements; or when the selected centrifugal pump is running in a particular pipeline, The flow rate provided does not necessarily meet the requirements of the delivery task. The original speed of the pump is n and the working point is M.. The flow rate decreases as the speed decreases, and the power consumption also decreases accordingly, so it is more reasonable from the perspective of energy consumption.　　1. Changing the opening of the valve