The lab why single-stage rotary vane vacuum pumps _

how to choose the vacuum pump used in the laboratory for the user is a problem. After using a vacuum pump, many users will encounter vacuum gauge, vacuum degree was observed enough ( Attraction is not enough) , pumping speed too slow, and used in the relatively closed room. When using a pump, there is all sorts of problems such as too much noise or oil mist. But these problems often have more relationship with choice. Commonly used in the laboratory is a single-stage rotary vane vacuum pump. Its performance is stable, durable, powerful, no oil mist exhaust, low noise, small vibration. Therefore, in the laboratory used single-stage rotary vane vacuum pump is very appropriate.

the average user may not be able to understand the import single-stage rotary vane vacuum pump of the relationship between the parameters and the actual use effect. In general, the user to buy laboratory vacuum time mainly consider the following factors:

1. If using the environment need to ensure that no pollution: due to the design principle, some vacuum pump will need to use other media to assist the operation of the pump, such as oil rotary vane vacuum pump and vacuum pump, water circulation need to pour out the oil pump and connecting water respectively. When using the oil water pump, oil mist emissions into the air, pollute the environment; And pump must be connected to the water, because it needs to connect to the water. Some need to suck out in the room, clean room of cells in cell culture supernatant of customer cannot use these products. In this case, should choose oil-free vacuum pump, and insert this kind of product.

2。 What kind of instrument and equipment used together: different devices with different, some require higher vacuum, such as vacuum distillation; Some require high pumping speed, such as vacuum drying oven, need to consider the internal volume of the tank; And the application of vacuum suction is more complicated. It is necessary to check the filter filtrate volume, particulate matter content in the liquid, and then choose according to different conditions suitable vacuum or pumping speed.

3。 The volume of the volume of equipment: equipment and pumping speed of vacuum pump parameters are related. For example, when used with general 1000 ml vacuum filter bottle, I only need to use the smallest vacuum pump, pumping speed of 20 l/min. To fit the needs of an individual.

4。 What is to ensure that the correct use of the required attachments: when using certain vacuum system lack of attachment will make the operation become very difficult. For example, vacuum regulator plays an important role in many ways. It can observes the working state of the system, and according to the actual need to adjust the pumping speed. When vacuum filter, including buffer bottle and block water filters, fall prevention deputy components effectively avoids the problem of pump and vacuum pump damage, and is a very useful accessories.

laboratory vacuum pumps are widely used. Single-stage rotary vane vacuum pump application in the laboratory mainly includes the following aspects:

1) Vacuum filter: can be combined with various laboratory vacuum filtration unit, such as solvent filters, sand filter bottle, buchner funnel filter bottle, bottle cap filters, microbial limit test filter device, the multiple filters, etc. Due to its high vacuum and pumping speed, laboratory vacuum pumps especially suitable for large capacity filter bottle and has a large number of channels more filters. At the same time, some of the common pump pump use slower or without the use of filters. For samples, suspended solid in the water, or the sample of the high solid content, using a laboratory vacuum pumps can provide excellent results;

2) Vacuum drying: suitable for vacuum drying tank or the small size of the vacuum drying oven. Change laboratory vacuum pump is used to eliminate the need of oil pump, eliminate the unnecessary trouble and noise.