Thread Content
Differences and connections between positive pressure pumps and negative pressure pumps. There are now many types of miniature vacuum pumps, miniature air pumps, miniature gas sampling pumps, miniature gas circulation pumps, miniature exhaust pumps, miniature suction pumps, miniature inflation pumps, miniature charging pumps, and miniature high-pressure air pumps. Some of them are positive pressure pumps, while others are negative pressure pumps. How can you tell the difference? Generally, micro pumps have an intake port and an exhaust port; those that can create a pressure lower than normal pressure (that is, atmospheric pressure) at the intake port are referred to as \"negative pressure\" pumps” ； A condition in which a pressure higher than normal atmospheric pressure is generated at the exhaust outlet is called “positive pressure”” ； For example, the vacuum pump that we often mention is a negative-pressure pump, while a pressure booster pump is a positive-pressure pump. Difference: Positive pressure pumps and negative pressure pumps are very different. For example, regarding the gas flow direction, the negative pressure pump draws external gas into the suction nozzle ； Positive pressure is expelled from the exhaust nozzle ； Such as the level of air pressure, etc. In fact, “negative pressure pumps” and “positive pressure pumps” are artificially distinguished based on their functions and primary uses. ““Negative pressure pumps” are primarily used in applications that require a vacuum (negative pressure), such as gas extraction, gas analysis, gas circulation, gas sampling, vacuum adsorption, and indirect water absorption ； On the other hand, “positive pressure pumps” are mainly used in situations where a pump is needed as a power source for transferring gases, pressurizing sealed containers, inflating items, or indirectly pumping water. Both types of pumps are frequently utilized in fields such as medicine, research, environmental protection, instrumentation, and control systems. Contact: There is also no absolute difference between the two. “The exhaust side of a \"negative pressure pump\" also has positive pressure, though it is only a slight positive pressure – much lower than the output pressure of a \"positive pressure pump\". For example, our micro vacuum pump series such as VM, VAA, and PC are considered \"negative pressure pumps\" or \"suction pumps\", and the pressure at their exhaust side is usually only a few kilopascals (KPa) ； “The suction side of a positive pressure pump also has a slight negative pressure in order to carry out the pumping function. For example, our CQ series of micro inflation pumps ； Of course, in many cases where it is necessary to achieve a high negative pressure at the pump’s suction side and a high positive pressure at the exhaust side, our miniature pump that can function both as an extractor and an inflator is well-suited to meet these requirements. For example, the PCF5015N model can generate a negative pressure of -50 Kpa as well as a positive pressure of >100 Kpa. It is compact in size, and valves can be installed at the suction and exhaust ends; it can still function properly even when these valves are closed, thus achieving both versatility and cost reduction.