How to choose good quality roots screw vacuum unit? - - - - - -

How to choose good quality roots screw vacuum unit?

how to choose the roots screw vacuum unit, should pay attention to? How to choose a good vacuum unit? But choose to select the correct pressure vacuum unit, otherwise will not be able to achieve the goal of enterprise. Next, introduces how to choose the high quality vacuum unit?

the composition of the roots vacuum pump units, roots pump and the backing pump pumping speed ratio between the choice is very important. Due to the compression ratio of rotary pump co. , LTD. The compression ratio determines the capacity of the former stage pump, because of the compression ratio and the pumping speed is inversely proportional to. Usually, the compression ratio to choose between 2 ~ 10. Other compression ratio should be considered for drainage when asked. Vacuum equipment in various kinds of mechanical equipment is used as the auxiliary equipment. If the normal working hours longer than predicted pumping time, you can select smaller backing pump ( Compression ratio can be more) 。 In order to make rapid advance pumping, please use the larger backing water pump. Sometimes in order to better use of the equipment efficiency, before the equipment installed a large pump, the pump will stop running after normal operation, and use smaller backing pump maintenance. This is done to save electricity.

when choosing a backing pump must also consider the requirement to the extreme pressure of vacuum unit. Ultimate vacuum is higher ( Up to 1 x 10 - 3 pa ~ 1×10 - 2 pa pressure) 。 Usually, backing pump using two stage rotary vane type oil seal mechanical pump or two stage slide pump. Before the pump can be in ( 1×10- 2 pa ~ 1×10 - 1Pa) Choose between single stage oil seal mechanical pump, in order to achieve the highest degree of vacuum. Reciprocating vacuum pump or 020 - 9 type vacuum pump is used as the backing pump.

when selecting reciprocating or thick liquid ring vacuum pump is regarded as the backing pump of the roots vacuum pump and backing pump of the pump speed is usually the roots vacuum pump pump speed of 1/2 - A quarter. Compression ratio is too large, the result of the roots vacuum pump exhaust temperature is too high and not work properly. When choosing a backing pump, also need to consider pumping gas in the presence of corrosive medium, and whether it contains condensable gases ( Whether large or trace) 。 If it contains corrosive gas cannot choose oil seal mechanical pump. Mechanical pump oil seal type is not applicable to extract contains a lot of condensable vapor gas, sealing fluid will quickly emulsion, and contain a small amount of gas of condensable vapor will be removed. You also need to choose with roots screw 4 oil seal mechanical pump as the backing pump of the unit.

in order to lower the inlet pressure ( 1 - 100pa) Obtain high pumping speed, a roots vacuum pump can be used as a level 3 or level 4 unit, the unit by another of roots vacuum pump before. At this moment, roots vacuum pump pump speed ratio is usually between 2 and 5.

the above is how to choose the high quality vacuum the entire contents of the unit. If there are other don't know where can explain and communication with our customers, we will serve you wholeheartedly.

At the same time, as the recent research of JT shows, the benefits of improved productivity and firm performance can make implementing basic management practices worth it.
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