IMO screw pump It is a kind of pump with stable flow, high conveying pressure and suitable for conveying high viscosity medium. Screw pump The selection of is very critical because different pumps are suitable for different media and working conditions. This article will introduce the selection method and precautions of screw pump.

1、 Selection method

（1） Select appropriate structure type

IMO agent Screw pumps have a variety of structural types, such as single suction single row, single suction double row, double suction single row, double suction double row, etc. It is very important to select the appropriate structure type according to the transportation characteristics of different media.

（2） Determine the size and model of the pump

The specification and model of the pump usually depend on the nature, flow, head, conveying distance and other factors of the conveying medium. When purchasing, it is necessary to fully understand the physical and chemical properties, transportation requirements and working environment of the required transportation medium.

（3） Consider the performance parameters of the pump

ALLWEILER screw pump The performance parameters usually include flow, head, power, speed, etc. These parameters directly affect the pump delivery capacity, efficiency, size of selector components, materials and other factors.

（4） Pay attention to safety and reliability

When purchasing screw pump, not only the performance of the pump should be considered, but also the safety and reliability of the pump should be considered. Especially when conveying flammable, explosive, toxic and harmful media, pumps with reliable and safe performance must be selected.

（5） Consider the operation, maintenance and cost of the pump

When purchasing screw pump, the operation, maintenance and cost of the pump must be considered. The maintenance cost of the pump includes the cost of overhaul, replacement, maintenance parts and consumables, which are important factors affecting the service life and efficiency of the pump.

2、 Precautions

（1） Choose the right material

The material used for screw pump involves factors such as medium property and working environment. Generally speaking, when transporting corrosive media, acid and alkali resistant materials should be selected, and when selecting impeller materials, factors such as corrosiveness and durability of different media to materials should be considered. In addition, depending on the special requirements of the working environment, special materials or coatings may also be required.

（2） Reasonably match the driving mode of the pump

Common pump drive modes include electric, hydraulic, pneumatic, etc. Different drive modes are applicable to different media and working conditions. Electric pumps are usually suitable for conveying dense media or working continuously for a long time; Pneumatic pump is suitable for humid, flammable and explosive environment or occasions requiring frequent switching and adjustment; The hydraulic pump is suitable for occasions requiring high pressure transmission.

（3） Arrange the pump structure and layout according to the actual working conditions

The structural layout of the screw pump must be designed according to the actual working conditions, for example, the exhaust mode is determined according to the elevation difference between the inlet and outlet of the pump; The pipe type and pipe diameter shall be determined according to the location of the pump.

（4） Select reliable manufacturers

When purchasing screw pumps, reliable manufacturers should be selected. The manufacturer's technical strength, plant equipment, brand awareness, after-sales service and other aspects are important considerations in selecting a manufacturer.

（5） Correct installation and commissioning

Correct installation and commissioning is the key to maintain the normal operation of screw pump. Before installation and commissioning, carefully check the parameters of the pump and related equipment, and pay attention to the operation details. When disassembling, overhauling or replacing accessories, follow the operating procedures to avoid damaging components or affecting the normal operation of the pump.

To sum up, it is very important to select a suitable screw pump, which is not only related to the quality and efficiency of medium delivery, but also related to the cost of operation and maintenance, work safety and reliability and other factors. During the purchase and use, appropriate screw pump shall be selected according to the actual situation, and attention shall be paid to the precautions for the use of the pump to ensure its normal operation and improve the working efficiency and service life.