Mute oil-free vacuum pump usually selects the extreme vacuum degree of the pump to be 0.5 to 1 order of magnitude higher than the vacuum degree of vacuum equipment operation. Correctly select the operation point of oil-free vacuum pump. Each pump has a fixed operating pressure scale, such as the operating pressure scale of 2BV series oil-free vacuum pump 760mmhg~25mmhg (absolute pressure). Within such a wide pressure scale, the pump speed changes with the pressure (refer to the pump function curve for detailed changes), and its stable operating pressure scale.
Therefore, the operating point of the pump should be selected within this scale, rather than long-term operation at 25~30mmhg. Compared with the oil pump, the oil-free vacuum pump has low vacuum degree and small air extraction volume, but it is small in size, easy to install, simple to maintain, convenient to move, does not pollute the environment, and does not produce oil smoke, especially in laboratories with high requirements. It is also one of the standing equipment in the laboratory.
Therefore, when choosing an oil-free vacuum pump, you should first determine the vacuum required to work. If the demand is high, the vacuum pump you choose should be higher than the vacuum required, otherwise you can't meet the requirements of vacuum pumping, you will not meet the requirements of work. Another is the pumping rate of oil-free vacuum pump, which should be slightly greater than the required pumping rate when selecting the type, so as to better meet the needs. After Z, check whether the extracted gas is corrosive. Corrosive gas will corrode the pump, and special materials must be used to meet the requirements.
