Other Working Conditions That Should Be Understood When Selecting A Single Screw Pump

Single Screw Pump has always been working in a harsh environment and sudden bad weather conditions, so its stability and reliability are particularly tested. The diesel engine self-priming sewage pump is driven by a domestic first-class and world-class diesel engine, and a special intelligent control system for diesel engine water pumps is introduced. The unit set adopts the automatic track microcomputer adjustment method independently developed by our company. The concentricity error and the working displacement control of the machine base are at the leading level in China! The single screw pump produced by our company has successfully entered the domestic water conservancy bureau and water affairs bureau through bidding, and has been affirmed and praised by the leaders and experts of the water conservancy bureau!

The basic data for the selection of single screw pumps must first understand what specific medium the liquid is to be transported. The name of the main liquid, the main characteristics of the liquid (such as whether the liquid is corrosive, restorative, flammable and explosive, toxic, etc.), the specific temperature of the liquid, whether it contains particles, the content of particles, and the specific particle diameter, the density of the medium, the viscosity of the medium, etc.

Then determine the performance parameters of the single screw pump. First, you need to understand the flow rate required by the user, and then you need to understand the length and height of the inlet pipeline of the self-priming pump, and in which specific area it is convenient to use. Check the atmospheric pressure to calculate whether the suction range of the self-priming pump can meet the working conditions and the layout of the pipeline of the self-priming pump outlet system; the specific vertical height, horizontal distance, pipe diameter, number of elbows, number of valves, what is the purpose of the self-priming pump pumping water out, whether there is pressure at the end, etc., so that the manufacturer can choose a self-priming pump product with a suitable head for you, and understand the operation mode of the device (intermittent operation or continuous operation). Other working conditions that should be understood when selecting a single screw pump. When selecting a self-priming pump, it is also necessary to consider the limitations of the operating conditions of the use environment, budget cost, installation location of the self-priming pump, safety (such as conveying flammable and explosive liquids or the environment requires explosion-proof motors), whether environmental pollution requires the self-priming pump to achieve a leak-free function, etc. For example, a vertical leak-free self-priming pump.

Compared with similar domestic products, single screw pumps have the characteristics of simple structure, good self-priming performance, strong sewage discharge capacity, high efficiency and energy saving, and convenient use and maintenance. They are the first in China in the sewage pump series. The technical performance indicators are leading in China and have reached the international advanced level, with broad application market and development prospects. 1. Ambient temperature ≤45℃, medium temperature ≤60℃. 2. The medium pH value of cast iron pump is 6-9, and that of stainless steel pump is 1-14. 3. The maximum diameter of the passing particles is 60% of the pump diameter, and the fiber length is 5 times the diameter. 4. The total weight of impurities in the medium does not exceed 15% of the total weight of the medium, and the specific gravity of the medium does not exceed 1240 kg/m3.

Due to the special structure of the single-screw pump body, after the water pump stops, there is a certain amount of water in the pump body. After the pump is started again, due to the rotation of the impeller, the air and water in the suction pipeline are fully mixed and discharged to the gas-water separation chamber. The gas in the upper part of the gas-water separation chamber overflows, and the water in the lower part returns to the impeller and remixes with the remaining air in the suction pipeline until all the gas in the pump and the suction pipe is discharged, self-priming is completed, and water is pumped normally. The single-screw pump combines the water ring wheel and the water pump impeller in a shell, and uses the water ring wheel to discharge the gas to achieve self-priming. When the pump is working normally, the valve can be used to cut off the passage between the water ring wheel and the water pump impeller, and the liquid in the water ring wheel can be released. The single screw pump is composed of a centrifugal pump and a jet pump (or ejector). It relies on the ejector device to create a vacuum at the nozzle to achieve suction.