The water pump is a machinery that transports liquid or pressurizes liquid. It transmits the mechanical energy of the prime mover or other external energy to the liquid to increase the energy of the liquid. It is mainly used to transport liquids including water, oil, acid and alkali, emulsion, suspension emulsion and Liquid metals, etc., can also transport liquids, gas mixtures, and liquids containing suspended solids. He is widely used in our daily life, the most common sewage system. Recently frequent precipitation, this time the pump will play a role. As a commonly used water treatment equipment, water pump plays a vital role in household, farmland irrigation and industrial production. To choose a suitable water pump, many factors need to be considered.

1, you need to understand the purpose of the pump.

Different application scenarios require different types of pumps. For example, household use may require smallSelf-priming water pump, while farmland irrigation may require large flow, high-liftCentrifugal pump.

2. Quality and reliability of water pump

Choosing well-known brands and pump manufacturers with good reputation, such as Hunan Sanchang Pump Industry, can provide reliable quality products and provide after-sales service guarantee.

The budget is also a factor to consider.

According to their own economic situation and actual needs, reasonable planning budget, choose cost-effective pump.

4. Pipeline arrangement conditions of device system

The pipeline layout conditions of the device system refer to some data such as the lowest liquid level on the suction side and the highest liquid level on the discharge side, as well as pipeline specifications, length, materials, pipe fittings specifications, quantity, etc., so as to calculate the head of the tie comb and check the NPSH.

5. Operating conditions

The contents of the operating conditions are many, such as the operation of the liquid T saturated steam force P, suction side pressure PS (absolute), discharge side container pressure PZ, altitude, ambient temperature operation is gap or continuous, the position of the pump is fixed or movable.

6. Liquid properties

Liquid properties include the name, physical properties, chemical properties and other properties of the liquid medium. The physical properties include temperature C, density D, viscosity U, diameter of solid particles in the medium and content of gas, etc. This involves the head of the system, calculation of effective cavitation margin and type of suitable pump: chemical properties, mainly referring to the chemical corrosiveness and toxicity of the liquid medium, it is an important basis for selecting pump materials and selecting shaft seal types.

7. Flow

Flow is one of the important performance data of pump selection, which is directly related to the production capacity and conveying capacity of the whole device. For example, the design institute can calculate the normal, minimum and maximum flow rates of the pump in the process design. When selecting the pump, the maximum flow rate is taken into account. When there is no maximum flow rate, 1.1 times of the normal flow rate is usually taken as the maximum flow rate.

8. Head

The lift required by the device system is another important performance data for selecting pumps. Generally, the lift is selected after enlarging the margin by 5%-10%.

Only by fully understanding their own needs and making reasonable comparisons and choices can we find the most suitable water pump and provide efficient and convenient water supply for life and work.