The function of the water ring vacuum pump unit, to a great extent, is in fact to create a preparatory vacuum needed for the roots pump. In general, for the single stage vacuum pump unit, we should pay attention to its own limit really space is not high, and we In fact, it is to pay attention to some things.
In fact, the pre vacuum required by our country’s roots pump is actually higher. In view of this, we are actually not going to use a single level water ring vacuum pump unit as a front pump on the roots pump. In the next word, we should pay attention to the limit. The lower pressure of the two-stage water ring pump to be used as a front-stage pump, so that in fact it can reduce the unit itself a limit pressure.
A vacuum pump unit and a water ring pump limit pressure is actually 400Pa, in this respect, in a large extent, in fact, can directly meet the general situation of the vacuum needs, but, in terms of the scope of its use, we are actually to pay attention to it itself is also the subject. To a certain limit.
When we directly use two roots pumps in series, and then combined with the vacuum pump unit, in a certain degree, it can greatly increase the limit pressure of the unit itself (can reach 25Pa). It is also because of this, we are actually to pay attention, in this type, the more common in fact is the two roots pump series after the use of double pump directly on the front level of the pump unit.
However, as far as the application of the vacuum pump unit is concerned, when we need to have a higher limit pressure, we should pay attention to the combination of three roots pumps and vacuum pump units, and to a certain extent, in a certain extent, it is direct. 1Pa.
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