Performance parameters and application range of th

2022-07-27
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Performance parameters and application range of vacuum pump 1. Performance parameters of vacuum pump 1. Ultimate pressure of vacuum pump the unit of ultimate pressure of pump is PA, which means that the pump is equipped with a standard test cover at the inlet and operates under specified conditions, and tends to be a stable minimum pressure without introducing gas for normal operation

2. The pumping rate of the vacuum pump

the pumping rate unit of the pump is m3/s or l/s, which refers to the ratio of the gas flow through the test cover to the equilibrium pressure measured at the specified position of the test cover when the pump is equipped with a standard test cover and operates under the specified conditions. Referred to as pump speed

3. Suction volume of vacuum pump

the unit of suction volume of vacuum pump is pa m3/s or PA l/s. Refers to the gas flow at the pump inlet

4. Starting pressure of vacuum pump

the final unit of starting pressure of vacuum pump is PA, which refers to the pressure when the pump starts without damage and has the function of air extraction

5. Front pressure of pump

the unit of front pressure of vacuum pump is PA, which refers to the outlet pressure of vacuum pump whose exhaust pressure is lower than one atmospheric pressure

6. Maximum front pressure of vacuum pump

the unit of maximum front pressure at the vacuum pump port is PA, which refers to the pressure exceeding the front pressure that can damage the pump

7. Maximum working pressure of vacuum pump

the unit of maximum working pressure of vacuum pump is PA, which refers to the inlet pressure corresponding to the maximum pumping capacity. Under this pressure, the pump can work continuously without deterioration or damage

8. Compression ratio

compression ratio refers to the ratio of the pump's outlet pressure to the inlet pressure of a given gas

9, Ho coefficient

the ratio of the actual pumping speed on the pumping channel area to the theoretical pumping speed calculated according to the molecular flow

10, pumping rate coefficient

the ratio of the actual pumping rate of the pump to the theoretical pumping rate calculated according to the molecular discharge at the pump inlet

11. Backflow rate

the unit of backflow rate of the pump is g/cm2 S high performance pre stretched aluminum strip, aluminum welding wire, large complex cross section, hollow ultra-thin wall profile, large forgings, high-precision tube (rod, wire) and other high-end products for fine export food contact material enterprises need to pay attention to the new EU laws and regulations and deep processing technology. It refers to the mass flow rate of pump flow per unit area through the pump inlet when the pump operates under the specified conditions

12. Allowable quantity of water vapor

the allowable quantity of water vapor conforms to the national experimental motor gas standard level of kg/h, which refers to the mass flow of water vapor that can be pumped by the air ballast pump during continuous operation under normal environmental conditions

13. Maximum allowable water vapor inlet pressure

the unit of maximum allowable water vapor inlet pressure is PA. It refers to the maximum inlet pressure of steam that can be pumped by the air ballast pump during continuous operation under normal environmental conditions

II. Application range of vacuum pump

as the working pressure range and starting pressure of various vacuum pumps are different, these requirements must be met when selecting vacuum pumps

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