Principle and use of vacuum pump spare parts vacuum pump

Principle and use of vacuum pump spare parts vacuum pump:

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 operates according to the specified conditions, and the lowest pressure tends to be stable without introducing normal gas operation.

2. Pumping rate of vacuum pump

The pumping rate unit 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. 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. Pump 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. Maximum front pressure of the vacuum pump

The maximum front pressure unit of the vacuum pump port is PA, which means that the pressure of the front stage that can damage the pump is exceeded.

7. Maximum working pressure of the vacuum pump

The maximum working pressure unit of the vacuum pump is PA, which is the inlet pressure corresponding to the maximum pumping amount. 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. Return flow rate

The unit of the 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. Maximum allowable water vapor inlet pressure

The maximum allowable water vapor inlet pressure unit is PA. It refers to the highest inlet pressure of water vapor that can be pumped out during continuous operation under normal environmental conditions.