Generally, the pump has two ports of intake and exhaust. It can be called “negative pressure” at the inlet port below the atmospheric pressure (ie atmospheric pressure); it can be called “positive” at the exhaust port. Pressure". For example, we often say that the vacuum pump is a negative pressure pump, and the booster pump is a positive pressure pump.
The vacuum pump is a rotary variable volume gas delivery pump. The vacuum pump must be equipped with a foreline pump to use a large pumping speed over a wide pressure range, and is insensitive to dust and water vapor in the extracted gas. Widely used in metallurgy, chemical, food, electronic coating and other industries. The booster pump, as its name implies, is a pump used for supercharging. Its main uses are water heater boosting, high-rise low water pressure, sauna, bathing, etc., the uppermost water pressure of the apartment is insufficient, and the solar energy is automatically pressurized. Use and so on. There are a wide variety of household booster pumps, pipeline booster pumps, fire booster pumps, pneumatic booster pumps, gas-liquid booster pumps and more.
[Difference]: The positive pressure pump is very different from the negative pressure pump. For example, the flow direction of the gas, the negative pressure pump is the external gas is sucked into the suction nozzle; the positive pressure is sprayed out from the exhaust nozzle; such as the level of the air pressure. In fact, "negative pressure pump" and "positive pressure pump" are mainly artificially distinguished from functions and main uses. "Negative pressure pump" is mainly used in places where vacuum (negative pressure) is required, such as: pumping, gas analysis, gas circulation, gas sampling, vacuum adsorption, indirect water absorption, etc.; and "positive pressure pump" is mainly used for needs. The pump is used as a power to carry out gas transfer, pressurization of a closed container, inflating and inflating, indirect water pressure, etc., which are commonly used in medical, scientific research, environmental protection, instrumentation, control, and the like.
[Similarity]: There is no absolute difference between the two. The "negative pressure pump" has a positive pressure at the exhaust end, but it is a slight positive pressure, which is much smaller than the output pressure of the "positive pressure pump". For example, our miniature vacuum pumps XZ, 2XZ, WXZ and other series are "negative". Pressure pump", "suction pump", and their exhaust end pressure is often only a few kilopascals (KPa); "positive pressure pump" suction end is also slightly negative pressure, in order to complete the pumping effect. For example, our miniature air pump CQ series; of course, many times, both the pump's pumping end can provide a higher negative pressure, and the exhaust end output a large positive pressure, our micro pumping, pumping two This can be done very well with a pump. Simply put, the negative pressure pump is the air pump, and the positive pressure pump is the air pump. The connection between the two is opposite to the interface of the container. This is because each pump is an air inlet, an air outlet, and the air is inflated. , reverse pumping. One pump for two.
For more information hydrostatic pressure test equipment, please get in touch with us!