How to choose a vacuum pump for the vacuum pump unit?

In the vacuum pump unit, when the vacuum pump is selected, the vacuum pump unit selects the vacuum pump and the key method. The optional vacuum pump is selected appropriately. It will save a lot of cost in terms of cost. The vacuum pump unit with the vacuum pump has a good grasp of the operation and maintenance cost. A lot of benefits, the following describes the vacuum pump unit vacuum pump:

First, the basis of the pump selection of the vacuum pump unit

(l) According to the ultimate vacuum degree that the vacuum chamber needs to meet when the vacuum unit is idling, and the vacuum degree required for the actual production operation, which vacuum pump can be used to meet the requirements. The optimal working range of several common vacuum pumps is as follows: oil seal mechanical pump 10-105, water jet vacuum pump 102-105, oil booster pump 10-1-1, rotary vane vacuum pump 10-4-10-2

(2) Select the size of the pump according to the amount of gas released during the process production and the amount of gas leakage from the system.

1) Calculate the effective pumping speed of the main pump:

The effective pumping speed of the Sp-one pump at the outlet of the vacuum chamber

Pg - the working pressure required by the vacuum chamber. Pa:

Q—the total amount of gas in a vacuum chamber, Pa.M3/s

Q1 - the amount of gas generated during the vacuum process, Pa.m3 / s;

Q2 - the amount of gas released from the vacuum chamber and vacuum components, Pa.m3 / s;

Total leakage of the Q3-one vacuum chamber. Pa.m3/s