Micro pumps in accordance with what criteria to choose it? According to the following principles to choose. First, the working medium at room temperature (0-50 ℃), simply pumping water or solution, not water vapor dual use, but requires self-priming capability, and the flow and output pressure requirements. Description: The working medium is pumping water, non-oily, not strong corrosive liquid solution (can not contain solid particles, etc.), must have self-priming function, you can choose the following pumps: 1, the flow requirements of a larger L / min), the pressure is not demanding (about 1 to 3 kg), mainly used for water circulation, water sampling, upgrading, etc., require noise, long life, high self-priming suction, etc., the optional BSP, CSP series ; 2, the flow of less demanding (about 1 to 5 liters / minute), but the pressure is large (about 2 to 11 kg), mainly used for spraying, pressurization, car washing do not need long hours of work under high pressure or heavy load ASP, HSP and other series can be selected; 3, for the tea table pumping, spraying, etc., the required volume as small as possible, the flow requirements of small, low noise (about 0.1 to 3 liters / minute) . Second, the working medium at room temperature (0-50 ℃), the need for pumping water or gas (which may be mixed water or air, dry turn occasions), value the volume, noise, continuous use and other properties. Description: Requires water and gas dual-use, can be long-term dry turn, do not damage the pump; 24 hours of continuous operation; particularly small size, low noise, but the flow, pressure less demanding. 1, with a mini pump or vacuum pump, but sometimes there will be liquid water into the pump chamber. 2, require micro-pump both pumping and pumping. 3, with a miniature pump, but sometimes there may be no pumping pump, in the "dry turn" state. Some traditional pumps fear "dry turn", "dry turn" can even damage the pump. The PHW, WKA series of products is essentially a composite function pump, which integrates the functions of vacuum pumps and pumps, some people call it "vacuum pump." So, in the absence of water, it will be evacuated, and when it has water it will pump it. Whether it is pumping or pumping state, belong to the normal work category, it does not matter "dry turn" damage. 4, the main pump with a micro-pump, but do not want to manually increase by pumping water before the "diversion" (some pumps in the work before the need to manually add some "diversion", so that the pump can pump up the water down, or the pump can not pump water or even Damage), that is, I hope the pump has "self-absorption" function. At this point you can choose PHW, WKA series products, their strength is that: In the absence of access to water, it is a vacuum, the formation of a vacuum by air pressure up, and then began pumping. With the above application, you can choose PHW, WKA series. Third, the working medium of high temperature (0-100 ℃), such as miniature pumps for water circulation cooling, water cooling, or pumping high temperature, high temperature steam, high temperature liquid, you must use micro-pump (high temperature type) Caixing: Temperature: 50-80 ℃, you can choose micro-gas dual-use WKA series high temperature medium type, the maximum temperature is 80 ℃ or 100 ℃; 2. If the temperature: 50-100 ℃, it must be Use WKA series of high temperature medium type, the maximum temperature is 100 ℃ temperature; (when the extraction of high temperature water (water temperature exceeds about 80 ℃), due to the precipitation of gas in the water, will greatly reduce the pumping flow, the specific reduction to the number of flow, please See here: (This is not a pump quality problems, please pay attention when selecting!)) Fourth, the flow of greater demand (more than 20 liters / minute), but the medium contains a small amount of oil, solid particles, residues and so on. Description: The media to be pumped, 1, contains a small number of smaller soft solid particles (eg, fish excrement, sewage sludge, debris, etc.), but the viscosity can not be too large, and it is best not to have a hair 2, allowing the working medium containing a small amount of oil (for example, a small amount of oil floating on the surface of the sewage), but not all oil! 3, flow requirements (more than 20 liters / minute): (1) do not need self-priming function of the occasion, and the pump can not be placed in water, solid particles can be cut into smaller particles: You can choose FSP super-flow series. (2) need self-priming, and the pump can be placed in the water, the optional submersible pump QZ (medium flow 35-45 liters / minute), QD (large flow 85-95 liters / minute), QC 145 liters / minute) three series of miniature submersible pumps, DC submersible pumps.