Selection in accordance with what criteria to select the type? Can be selected according to the following principles.
One, room temperature working medium (0-50 ℃), simply pumping water or solution, do not use water and gas, but requires self-priming ability, and the flow and output pressure requirements.
Description: pumping the working medium is water, non-oily, not strong corrosion of liquids and other solutions (can not contain solid particles, etc.), must have self-priming function, then you can choose the following pumps:
1, the flow rate requires a larger (about 4-20 liters / min), the pressure requirements are not high (about 1-3 kg), mainly used for water recycling, water sampling, lifting, etc., the requirements of small noise, long life Requirements for the volume as small as possible, the flow requirements of small, low noise (about 0.1 to 3 liters / min), you can choose ASP and other series.
Two, room temperature working medium (0-50 ℃), need to pump water or gas (may be mixed water and gas or idling, dry rotating occasions), the importance of volume, noise, continuous use and other performance.
Description: Requirements for both water and gas, can be dry running for a long time, without damage to the pump; 24 hours continuous operation; particularly small size, low noise, but the flow rate and pressure requirements are not high.
1, with a micro-pump pumping or vacuum, but sometimes there will be liquid water into the pump chamber.
2, requires micro pumps can pump both air and water.
3, with a miniature pump pumping water, but sometimes there may be no water pumping, in the "dry" state.
Some traditional pumps are afraid of "dry rotation", "dry rotation" will even damage the pump. WKA series products is essentially a composite function of the pump, which integrates the function of the vacuum pump and water pump, some people call it "vacuum water pump". Therefore, in the absence of water, it will pump a vacuum, when there is water it will pump water. Whether it is pumping state or pumping state, all belong to the normal scope of work, it does not matter "dry" damage.
4, mainly with micro-pump pumping, but do not want to pump water before relying on artificial plus "water" (some pumps need to manually add some "water" before the work, so that the pump can pump up the water in the lower part of the pump, otherwise the pump can not be pumped or even damage) That is, I hope the pump has a "self-priming" function. At this time, you can choose PHW, WKA series products, their strength lies in: no contact with the water, it is a vacuum, the formation of a vacuum by air pressure to the water up, and then began to pump.
With the above applications, you can choose WKA series.
Three, high-temperature working medium (0-100 ℃), such as the use of micro pumps for water circulation, water cooling, or pumping high temperature, high temperature water vapor, high temperature liquids, etc., it is necessary to use a miniature pump (high temperature type) to be:
1. Temperature: 50-80 ℃, you can choose a miniature dual-use pump WKA series of high-temperature media type, the highest temperature resistance temperature is 80 ℃ or 100 ℃;
2. If the temperature in: between 50-100 ℃, you must use the WKA series of high-temperature media type, the highest temperature-resistant temperature is 100 ℃;
four, the flow rate of large requirements (more than 20 liters / min), but the medium contains a small amount of oil, solid particles, residue, etc..
Description: to pump the medium,
1, contains a small number of small diameter soft solid particles (such as fish feces, sewage sludge, residues, etc.), but the viscosity can not be too large, and it is best not to have a hair class of entanglement;
2, allowing the working medium contains a small amount of oil (such as a small amount of floating on the surface of the sewage oil), but can not all be oil!
3!
3, the flow rate requirement is large (more than 20 liters / min):
(1) do not need self-priming function of the occasion, and the pump can not be put into the water, solid particles can be cut into smaller particles: you can choose the FSP super high flow series.
(2) do not need self-priming, and the pump can be put into the water, you can choose micro-submersible pump QZ (medium flow rate 35-45 liters / min), QD (large flow rate of 85-95 liters / min), QC (super large flow rate of 135-145 liters / min) three series of micro-submersible pumps, DC submersible pumps.