How to select the type of micro pump

Market there are many micro pump, micro liquid pump, small pump, pump, self priming pump, I see a dazzling, how to choose the model for me to use it?
Water pumps, especially micro pumps, the main parameters of the "flow", "pressure" or "head", whether the need for self absorption, etc.. Type selection according to the specific requirements to choose.
Simple pumping or liquid
Requirements: only need to pump or solution, must have the ability to suck, and the flow and output pressure is required. Description: the working medium is the pumping water, non oily liquid solution (not containing solid particles, etc.) have the function of self suction, you can choose one of the following: 1, pump large flow requirements (about 4 ~ 20 liters / min), pressure is not high (about 1 to 3 kilograms), mainly used for water circulation and water sampling and upgrading requirements, low noise, long service life, high self suction suction, optional BSP, CSP series; 2, traffic demand is not high (about 1 ~ 5 liters / min), but the pressure is larger (about 2 to 11 kilograms), mainly used for spraying, pressurization, the car does not require a long time to work in high pressure or large load, can choose ASP, HSP series; 3, tea table for pumping and spraying, the requirements of volume as small as possible, the traffic demand is small and the noise is small (about 0.1 ~ 3 liters / min), PHW, WKA, ASP and other optional series.
Two, water vapor mixing occasions
Requirements: the need for pumping water or gas, the value of volume, noise, continuous use of performance, and no one may be long-term monitoring, idling, dry transfer occasions (such as water smoked): water, dry dual-use requirements, not long-term damage to the pump; 24 hours of continuous operation; small size, low noise, but do not ask for flow and lift. 1, with a micro pump or vacuum pumping, but sometimes there will be liquid water into the pump chamber. 2, the requirements of the micro pump both pumping and pumping. 3, with a micro pump pumping, but sometimes there may be no water pump can be pumped in a dry turn state. Some traditional pumps fear dry turn, dry turn and even damage the pump. The PHW series is essentially a composite function of the pump, it integrates the function of the vacuum pump and pump, it is called a "vacuum pump"". Therefore, in the absence of water, it will be a vacuum, when there is water, it will pump. Whether pumping or pumping state, are in the normal work category, there is no so-called dry turn damage. 4, mainly using a micro pump, but do not want to rely on artificial pumping before "water" (some pump before work need to manually add some "diversion", so the pump to lower the water pumped, otherwise the pump can not be pumped or even damaged), that "pump has self-priming function. At this point, you can WKA, PHW series of products is the strength of the water, it is not exposed to the vacuum, the formation of a vacuum by pressure to the pressure to come up, and then began pumping. When there are more applications, you can choose PHW, WKA series.
Three, pure water or liquid, do not require self absorption capacity
Requirements: there is a large demand for traffic, medium containing a small amount of oil, solid particles, residues, etc.. Note: pumping medium, soft solid particles, 1 contains fewer and smaller diameter (such as fish waste, sewage sludge, residue, etc.), but the viscosity can not be too large, and it is best not to have a kind of hair entanglement. 2, allow the work medium containing a small amount of oil (such as a small amount of oil floating on the water), but not all of the oil! 3, large flow requirements, do not require self absorption features of the occasion. When there are more applications, you can choose FSP large flow series.