What should we pay attention to when choosing Roots vacuum unit

What should we pay attention to when choosing Roots vacuum unit?

How to choose Roots Vacuum Unit and the problems to be noticed? How to choose a good Roots Vacuum Unit?

The selection of pumping speed ratio between Roots pump and front pump is very important to the vacuum unit of Roots pump. Because the compression ratio of pineapple pump is very limited. The compression ratio determines the capacity of the front pump, because the compression ratio is the inverse ratio of the pump speed. Usually, the compression ratio is between 2 and 10. In addition, the requirement of pre-sampling time should also be considered. Vacuum equipment is an auxiliary equipment in various mechanical equipment. If the normal working time is much longer than the pre-pumping time, you can choose a smaller pre-pump (compression ratio can be larger), if the vacuum suffocation is larger, and requires rapid pre-pumping, then use a larger pre-pump.

The limit pressure requirement of Roots vacuum pump unit must also be considered when selecting the front pump. For high limit vacuum (1*10-3pa~1*10-2pa pressure), two-stage rotary vane oil seal mechanical pump or two-stage sliding mechanical pump are usually used in front pump. The limit vacuum degree requires that the front pump between (1*10-2pa~1*10-1pa) and (1*10-2pa~1*10-1pa) should be single-stage oil seal mechanical pump, and the front pump between 133-1333 PA should be reciprocating vacuum pump or liquid ring vacuum pump.

When the front pump of Roots vacuum pump chooses reciprocating or liquid ring rough vacuum pump, the speed of the front pump is generally 1/2-1/4 of the speed of Roots vacuum pump, which can not be too large, otherwise, the compression ratio is too large, resulting in high exhaust temperature of Roots vacuum pump and can not work normally. Y. When choosing the front pump, we should also consider whether there is corrosive medium in the pumping gas, whether there is condensable gas, size. If there is corrosive gas, oil seal mechanical pump can not be selected. Oil seal mechanical pumps are not suitable for extracting gases containing large amounts of condensable steam. Otherwise, the sealing fluid will be rapidly emulsified. When extracting gas containing a small amount of condensable steam, oil seal mechanical pump with gas ballast device must also be used as the front pump.

In order to obtain higher pumping speed under lower inlet pressure (1-100pa), Roots vacuum pump can be used as the first stage pump of another Roots vacuum pump to form a three-stage or four-stage unit. At this time, the pumping speed ratio of Roots vacuum pump is generally between 2 and 5.

ZJ Roots Vacuum Pump

ZJP Roots Vacuum Pump

How to Clean Water Ring Vacuum Pump

To ensure the long-term stable operation of water-ring vacuum pump, it is necessary to do a good job in equipment inspection, maintenance and maintenance, which can ensure the normal operation of the vacuum pump.

Equipment also needs to be cherished, not only refers to the appearance of clean, but also to the vacuum pump to clean up the interior. Speaking of this, we will certainly think that regular cleaning of the equipment surface, so that it can be. In fact, this recognition is wrong. The equipment operates at full load for a long time, and the main part of the water ring vacuum pump is the liquid, which will inevitably accumulate scales or other substances if the liquid flows for a long time. It is not enough to clean the scale in the unit simply with clean water, so how to clean the water ring vacuum correctly?

First, the vacuum pump needs to be disassembled. Second, nitric acid or other soluble substances should be prepared. It should be diluted and high purity can not be used directly. Otherwise, the internal components of the vacuum pump will be damaged directly. Next, the prepared nitric acid liquid will be placed in the container of the vacuum pump and wait for about an hour. Finally, the nitric acid liquid should be diluted. It is the end of the work, using clean water to wash the vacuum pump vessel with nitric acid liquid directly.

Water ring vacuum pump not only cleans this aspect, but also needs to maintain and inspect all parts of the unit in the daily operation of the equipment. If parts are found to be worn out during the inspection process, the parts must be replaced, and there can be no luck, otherwise it will affect the operation of the whole equipment and so on. 。 These cleaning, inspection, maintenance work, as large as system maintenance small parts replacement, do a good job in every detail of daily life, then there is no need to worry about a more serious failure of the vacuum pump.

2SK Liquid Ring Vacuum Pump

SY/2SY Series Compressor

Factors Influencing Sealing Effect of Water Ring Vacuum Pump

When we use water ring vacuum pump, sometimes the sealing effect will decrease. How can we deal with this situation? To solve the problem, we first need to understand the reasons for this situation.

1. The biological slime of water ring vacuum pump fills the gap of tension spring over time, which affects the compensation effect of tension spring in sealing, and also aggravates the wear of dynamic and static ring conflict pairs, which affects the sealing effect of auxiliary sealing ring. The appearance of this situation requires us to regularly arrange the vacuum pump.

2. It is inevitable that the working fluid of water ring vacuum pump (containing calcium ions) and the calcium carbonate produced by the reaction of carbon dioxide in the compacted medium will damage the mechanical seal, but we can carry out regular protection to minimize this problem.

3. The inductive effect of the isoaerobic bacteria, biological clay, calcium ions and the related chemicals in the working fluid on the corrosion of the metal parts of the whole mechanical seal body seriously affects the sealing effect and operation time of the mechanical seal.

4. Upstream adsorbent removes most of the dust through selection and other steps during loading, but with the increase of operation time and the erosion of medium airflow, new dust will always be produced more or less, and the dust entering the water ring vacuum pump may enter the sealing part of the machine at any time, causing damage to it, so it is needed. We maintain and clean regularly.

5. The slow corrosion of the sealing ring of water ring vacuum pump caused by the increase of related chemicals will lead to seal failure. In fact, before the selection of chemical reagents for use, experienced manufacturers will choose chemicals that are less corrosive or even not.

2BV series Liquid ring vacuum pump

DLV Series Double Stages Water Ring Vacuum Pumps

Water Ring Vacuum Pump Structural Characteristics

Water ring vacuum pump is composed of impeller, pump body, suction and exhaust disc, water ring, suction port, exhaust port and auxiliary exhaust valve formed in the inner wall of the pump. Because of its unique structural characteristics, water ring vacuum pump has been applied in many industrial processes. Let's get to know its structural characteristics together below.

1. The vacuum degree of the water ring vacuum pump is as high as 96%, which can replace the two-stage pump.

2. Streamlined impeller design can save 30%~50% energy than similar products. The impeller is made of high-quality stainless steel with good rigidity, toughness and corrosion resistance.

3. Using the coaxial design of motor and pump, the installation space is greatly saved. The motor shaft is made of 2Cr13 material, which is corrosion-resistant.

4.100% oil-free design is conducive to environmental protection.

5. Compact structure, small area, light weight, easy to install and use.

Water ring vacuum pump is used to transport or suck inflammable, explosive and corrosive gases in chemical production because of its above structural characteristics, reliable working balance and uniform flow.

2BE1 Series Liquid Ring Vacuum Pump

2BE3 Series Liquid Ring Vacuum Pump

Sand Blasting Technology of Water Ring Vacuum Pump

Presumably you have a certain understanding of all aspects of the water ring vacuum pump, and there are some more in-depth issues that need to be discussed with you. Today's content is about the sand blasting process of the water ring vacuum pump, I hope you can take a serious look at it.

1. After the first sand blasting and natural air drying of the water ring vacuum pump, industrial glue (silica slurry) is continued on the surface of the wax mould and the second layer of sand is sprayed. The size of the second layer of sand particles is larger and thicker than that of the previous first layer of sand. After the second layer of sand is sprayed by the water ring vacuum pump, the wax mould is also air-dried naturally at a set constant temperature.

2. After the second sand blasting and natural air drying of the water ring vacuum pump, the third sand blasting, the fourth sand blasting and the fifth sand blasting are carried out in turn. Requirement:

(1) According to the product surface requirements, volume, self-weight and other corresponding adjustments of the number of sand blasting. In general, the number of sand blasting is 3-7 times.

(2) The size of sand grains is different in each sand blasting process. Generally, the sand grains in the later process are thicker than those in the previous process, and the time of air drying is also different. Generally, a complete production cycle of sand on wax mould is about 3 to 4 days.

Above is some knowledge about water ring vacuum pump sand blasting process, you can refer to it. Today's content is introduced here, hope to help you, want to know more knowledge can continue to pay attention to us.

Dry Type Oilless Vacuum Pumps

Liquid Ring Vacuum compressor

Water ring vacuum pump

Operation Conditions of Vacuum Pumps

I believe you are not unfamiliar with the vacuum pump, and have a lot of knowledge about it. Have you ever known about the operating conditions of the vacuum pump? If not, let's take a look at the following article.

Because vacuum pumps have selective pumping, sometimes one pump can not meet the requirements of pumping. It needs several pumps to be combined to complement each other in order to meet the requirements of pumping. For example, the titanium sublimation pump has a high pumping speed for hydrogen, but it can not pump helium, while the tripolar sputtering ion pump (or the bipolar asymmetric cathode sputtering ion pump) has a certain pumping speed for argon. If the two pumps are combined, the vacuum device will get a better vacuum degree.

In addition, some vacuum pumps can not work at atmospheric pressure, need pre-vacuum; some vacuum pumps outlet pressure is lower than atmospheric pressure, need the front pump, so they need to be combined to use.

Piston Vacuum Pump

Oil Diffusion Vacuum Pump

Antisepsis of Water Ring Vacuum Pump

Water ring vacuum pump, maybe we haven't seen, but I believe you all know it, the next edition will take this opportunity to introduce you to the anti-corrosion work of water ring vacuum pump.

In the maintenance of water ring vacuum pumps, there is a skill that can not be ignored, that is, corrosion protection. As a form of metal corrosion, we all know that there are two kinds of metal corrosion, one is comprehensive corrosion, the other is general corrosion. No matter which kind of corrosion, it will not have very good results. In the future, we can prevent this kind of corrosion from causing unnecessary damage, but we can use polymer composite repair to implement organic coating corrosion protection on the surface of water ring vacuum pump, which is one of the most effective anti-corrosion measures at present.

Surface sticking protection of water ring vacuum pump can be widely used in repairing and pre-protecting coatings of abrasion, cavitation and corrosion parts.

Liquid Ring Vacuum Pump

Roots Vacuum Pump