1. The ultimate pressure of the vacuum pump
The ultimate pressure unit of the pump is Pa, which means that the pump is equipped with a standard test hood at the inlet and works according to the specified conditions. When the gas is not normally operated, the steady pressure is strong.
2, the pumping rate of the vacuum pump
The pumping rate of the pump is m3/s or l/s, which refers to the flow rate of the gas flowing through the test hood and the equilibrium pressure measured at the specified position of the test hood when the pump is equipped with a standard test hood and operated according to the specified conditions. Ratio. Referred to as the pumping speed of the pump.
3, the pumping capacity of the vacuum pump
The pumping unit of the vacuum pump is Pa m3/s or Pa l/s. Refers to the gas flow at the pump inlet.
4, the starting pressure of the vacuum pump
The starting pressure unit of the vacuum pump is Pa, which refers to the pressure at which the pump starts without damage and has a pumping action.
5, the pump's front pressure
The pressure unit of the front stage of the vacuum pump is Pa, which is the outlet pressure of the vacuum pump whose exhaust pressure is lower than one atmosphere.
6, the vacuum pump's Zui large pre-stage pressure
The vacuum pump port zui large front pressure unit is Pa, which means that the front pressure is greater than the pump that can damage the pump.
7, the vacuum pump's zui work pressure
The large working pressure unit of the vacuum pump is Pa, which refers to the inlet pressure corresponding to the large pumping amount of zui. At this pressure, the pump can work continuously without deterioration or damage.
8, compression ratio
The compression ratio is the ratio of the outlet pressure of the pump to a given gas and the inlet pressure.
9, Ho's coefficient
The ratio of the actual pumping speed over the pumping passage area to the theoretical pumping speed calculated at the molecular effluent.
10, pumping speed coefficient
The ratio of the actual pumping speed of the pump to the theoretical pumping speed at the pump inlet as calculated by the molecular effluent.
11, reflux rate
The unit of flow rate of the pump is g/cm2.s. It refers to the pump flow mass flow rate per unit area through the pump inlet when the pump is operating under specified conditions.
12, water vapor allowable amount
The allowable unit of water vapor is kg/h, which refers to the mass flow rate of water vapor that can be pumped out by the pump when the pump is under normal environmental conditions.
13, Zui large allow water vapor inlet pressure
The large allowable water vapor inlet pressure unit of the zui is Pa. It refers to the high inlet pressure of the water vapor that can be removed by the gas ballast pump during continuous operation under normal environmental conditions.
Second, the use of vacuum pumps
Since various vacuum pumps have different operating pressure ranges and starting pressures, these requirements must be met when vacuum pumps are selected.
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