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NAT Traversal Service Guide

NAT devices allow the use of private IP addresses on private networks behind routers with a single public IP address facing the Internet. The internal network devices communicate with hosts on the external network by changing the source address of outgoing requests to that of the NAT device and relaying replies back to the originating device.

This leaves the internal network ill-suited for hosting servers, as the NAT device has no automatic method of determining the internal host for which incoming packets are destined. This is not a problem for general web access and email. However, applications such as peer-to-peer file sharing, VoIP services, and video game consoles require clients to be servers as well. Incoming requests cannot be easily correlated to the proper internal host. Furthermore, many of these types of services carry IP address and port number information in the application data, potentially requiring substitution with deep packet inspection.

Network address translation technologies are not standardized. As a result, the methods used for NAT traversal are often proprietary and poorly documented. Many traversal techniques require assistance from servers outside of the masqueraded network. Some methods use the server only when establishing the connection, while others are based on relaying all data through it, which increases the bandwidth requirements and latency, detrimental to real-time voice and video communications.

NAT traversal techniques usually bypass enterprise security policies. Enterprise security experts prefer techniques that explicitly cooperate with NAT and firewalls, allowing NAT traversal while still enabling marshalling at the NAT to enforce enterprise security policies.

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1. Roots pump should be installed in dry, ventilated and clean place

2. Roots pump should be installed horizontally, and the gap between pump and wall or other objects should be kept at least 300 mm. The oil window part of the pump shall be provided with space for easy observation of oil level.

3. When connecting the power supply, pay attention to the rotation direction of the motor. From the tail of roots pump motor, the rotation direction of motor shaft should be clockwise.

Operation steps: turn on the three-phase power supply of the motor, click the start button of the motor to check whether the steering direction is correct. If the steering direction is opposite, replace any two of the three power supply terminals.

4. The pipeline connecting roots pump and pumped vessel shall be clean, dry and free of leakage. The diameter of pipeline shall not be less than the inlet diameter of roots pump as far as possible, and the length shall be short to reduce the loss of pumping speed, and there shall be no leakage at the joint of pipeline.

5. If the extracted gas contains dust or granular substances, a suitable air inlet filter should be installed at the inlet of the pump to avoid damage to roots pump and front stage pump by dust or granular substances. (after the filter is installed, the pumping speed and limit pressure of roots pump will be affected, and the influence degree varies with the structure of the filter).

Water Ring Vacuum Pump And Water Ring Compressor Difference Between

Rotary Vane Vacuum Pump

Dry Scroll Vacuum Pump

Maintenance of 2XZ rotary vane vacuum pump

The maintenance of 2XZ rotary vane vacuum pump is the key to maintain the safe and long-term operation of 2XZ rotary vane vacuum pump

1. Keep the 2XZ rotary vane vacuum pump clean to prevent foreign matters from entering the pump;

2. Keep the oil level and do not run without oil;

3. Pay attention to observe the cleanness of the oil. If the pump oil becomes dirty, turbid, enters water or other volatile substances and affects the limit vacuum, the pump oil should be replaced in time. To replace the new oil, first start the pump and run for 30 minutes to make the pump oil thinner. Stop the pump and drain the oil from the oil drain hole. Then, open the air inlet to run for 1-2 minutes. During this time, a small amount of clean pump oil can be added from the air inlet to replace the oil in the pump cavity. After confirming that the pump has been cleaned several times, install the oil drain plug, and then inject clean pump oil from the oil filling hole to the oil level line;

4. When it is not used for a long time, it should be covered with suction and exhaust caps and placed in a dry place, and attention should be paid to moisture and rust prevention;

5. If it needs to be disassembled and overhauled, it must be carried out by professionals who have certain experience in repairing the pump, or contact the manufacturer.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Impeller machining of water ring vacuum pump

Impeller is an important part of water ring vacuum pump, which plays an important role. From blank processing to mechanical processing, every step of this component should meet the requirements of size, quality and material. Only in this way can we achieve stable operation. The processing of impeller should be standardized, and each step of processing should be accurate, and small links should not be ignored Only in this way can the quality of the whole vacuum pump be improved.

The blank casting of impeller is directly related to the machining step. The reliable quality of the blank can ensure that there will be no defects such as fracture and deformation during machining. The components of water ring vacuum pump have accurate design requirements, and the size of impeller is strictly measured. Therefore, the requirements of design drawings should be strictly followed from casting to machined parts Each processing link should be accurate to avoid production waste.

Whether the impeller production of water ring vacuum pump conforms to the design standard is inspected and passed by the quality inspection department. If only the wheel fails to meet the standard, problems will occur during assembly, which will easily lead to the overall failure of the pump. Standardized and standard unified examination should be conducted for the impeller processing. No matter in which link, the operator should be responsible and play a good technical ability, Strengthen their sense of responsibility and do the work in place.

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Rotary Vane Vacuum Pump

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Vacuum coating technology of water ring vacuum pump

The vacuum coating of water ring vacuum pump is a kind of technology to produce film material by physical way. This technology can protect the vacuum pump equipment and reduce its damage. However, many people may not understand this, so the following small series to give you a detailed introduction of the product's vacuum coating technology.

Vacuum coating technology is separated from the heating source to the surface of the pump, so it is also an important branch of water ring vacuum pump application technology. It has been widely used in optics, electronics, energy development, physical and chemical instruments, construction machinery, packaging, civil products, surface science and scientific research and other fields. The main methods of vacuum deposition are evaporation, sputtering, ion plating, beam stacking and molecular beam epitaxy. In addition, there are chemical vapor deposition methods.

If the purpose of vacuum coating is to change the physical and chemical properties of the surface of water ring vacuum pump, this technology is an important part of the surface treatment technology of water ring vacuum pump. This paper introduces its main application. In terms of optics, a piece of optical glass or quartz coated with one or several layers of thin films of different substances can become highly reflective or non reflective (i.e., antireflective film) or any expected proportion of reflection or transmission data, and can also be used as a filter for absorbing certain wavelengths and transmitting for another wavelength.

The high reflective film of water ring vacuum pump is in great demand, starting from large aperture astronomical telescopes and various lasers, to large window coated jasmine of new buildings. Antireflective coatings are widely used in photography, laser start, and large window coated glass of new buildings. Antireflective coatings are widely used in cameras and television cameras. Vacuum coating plays an important role in electronics. Various ranges of inherited circuits. The conductive film, insulating film and maintenance film should be used for memory, arithmetic unit and notification logic element. As a mask for the preparation of the circuit, chromium film is used.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

Pollution prevention of vacuum pump unit

Different vacuum systems require different degrees of vacuum. Therefore, under different operating conditions, it is often necessary to use a set of vacuum units to complete the operation, that is, the vacuum pumps working in different pressure ranges are connected in series. Such as vacuum transportation, vacuum impregnation, vacuum filtration, vacuum monotony, vacuum degassing (liquid steel treatment) and other processes need to use low vacuum pump unit with high working pressure and large displacement. Reciprocating vacuum pump, oil sealed vacuum pump, steam radiation pump, water ring pump and roots pump are commonly used in this kind of low vacuum pumping unit.

In addition, the application of vacuum pump unit also needs to be equipped with dust remover, monotone tank and other components according to the actual working environment gas cleanliness, humidity or other special environmental conditions.

Due to the complex working environment of vacuum pump unit, after long-term operation, the vacuum degree can not be pumped up, or the vacuum degree can not reach the original limit vacuum level and other faults. This is related to the oil vapor pollution of the vacuum chamber wall and the pollution of various pollutants in the vacuum process.

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Main characteristics of vacuum drying in vacuum system

Vacuum system is widely used in vacuum drying process. At present, vacuum drying equipment is constantly updated with the development of modern mechanical manufacturing technology and electrical technology. The so-called vacuum drying is a drying method in which the material is placed under negative pressure and reaches the boiling point under negative pressure by heating properly or by cooling down to make the material solidify through the melting point. The boiling point of water in the material decreases with the increase of vacuum degree in the negative pressure state. At the same time, vacuum pump is used to dehumidify the water in the material to reduce the water vapor content, which makes the water and other solutions in the material get enough kinetic energy away from the material surface.

Due to the isolation of air under negative pressure, some materials which are easy to oxidize and other chemical changes during the drying process can keep their original characteristics better, and the materials can be better protected by injecting inert gas and vacuuming. The common vacuum drying equipment includes: vacuum drying oven, continuous vacuum drying equipment, etc.

The process of vacuum drying is to place the dried materials in the airtight drying chamber, and heat the dried materials continuously while vacuuming with the vacuum system, so that the moisture inside the materials diffuses to the surface through the pressure difference or concentration difference. The water molecules obtain enough kinetic energy on the surface of the materials, and escape to the low-pressure space of the vacuum chamber after overcoming the mutual attraction between the molecules The process of pumping with empty pump.

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Heat treatment industry of vacuum pump system

The so-called vacuum heat treatment is a heat treatment method that the workpiece is heated to the required temperature in 10-1 ~ 10-2Pa vacuum medium, and then cooled at different cooling rates in different medium. Vacuum heat treatment is called efficient, energy-saving and pollution-free clean heat treatment by the contemporary heat treatment industry.

The vacuum heat-treated parts have a series of advantages, such as no oxidation, no decarburization, degassing, degreasing, good surface quality, small deformation, high comprehensive mechanical properties, good reliability (good repeatability, stable life), etc.

Therefore, vacuum heat treatment has been widely valued and applied at home and abroad. The popularity of vacuum heat treatment is regarded as an important indicator to measure the level of heat treatment technology in a country. Vacuum heat treatment technology is a hot spot in the development of heat treatment technology in recent 40 years, and it is also an important field of advanced manufacturing technology.

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What is the configuration of water ring vacuum pump

Water ring vacuum pump is one of the vacuum pumps. In fact, water ring pump was used as a self-priming pump before, but with the continuous research and improvement of people, its application has been very extensive. So what is the general configuration of water ring vacuum pump?

Water ring vacuum pump is mainly composed of impeller, pump body, suction and exhaust disc, water ring formed by water on the inner wall of pump body, suction port, exhaust port, auxiliary exhaust valve, etc. Because of such high-quality configuration, the pump can be widely used in many industrial processes, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture return and vacuum degassing.

Water Ring Vacuum Pump manufacturers

Roots Vacuum Pump

Piston Vacuum Pump

Roots vacuum pump installation instructions

When installing roots vacuum pump, it is recommended to install it by professionals. If it is necessary to install it by ourselves due to limited conditions, we must read the instructions carefully before installing it. Do not damage the operation of components during the installation process, which will cause problems in the use of Roots vacuum pump.

1. Roots pumps shall be installed in dry, ventilated and clean places.

2. The pump shall be installed horizontally, with a space of at least 300 mm between the pump and the wall or other objects, and the oil window of the pump shall have a space for easy observation of the oil level.

3. When connecting the power supply, attention shall be paid to the motor rotation. From the tail, the rotation of the motor shaft shall be clockwise. The specific operation steps are to connect the three-phase power supply of the motor, jog the motor start button, and check whether the rotation is correct. If the rotation is opposite, replace any two terminals of the three power terminals.

4. The pipeline between the pump and the container to be pumped shall be clean, dry and free of leakage. The diameter of the pipeline shall be no less than the air inlet of roots pump as much as possible, and the length shall be short to reduce the loss of pumping speed. The pipeline connection shall be free of leakage.

5. If the extracted gas contains dust or granular substances, a suitable air inlet filter shall be installed at the inlet of the pump to avoid the damage of Roots vacuum pump caused by dust or granular substances.

The installation of Roots vacuum pump is not only to ensure the correct installation, but also to ensure that the installation environment is clean and dry to avoid damage caused by some dust inside the pump.

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water ring vacuum pump unit isolation treatment

Vacuum pump is a kind of equipment that will be applied in many industries, and it plays an increasingly important role. However, in the process of use, it is inevitable that it will have such or such problems. When facing these problems, we must be patient to deal with them, because only in this way can it give full play to its use advantages, as well as for water ring vacuum pump unit , let's talk about its corresponding isolation processing. I hope this article will help you.

First of all, we should check whether the work is normal; whether there is leakage point in the vacuum system; at the same time, check whether the pipeline of the vacuum system and the continuous vent pipeline of the low pressure heater are damaged, whether the vacuum breaking valve is closed tightly, whether the sealing water is normal, and whether the steam supply pressure of the shaft seal is normal; Check whether the steam inlet valve, diverter valve and load relief valve of the shaft seal are normal, whether the water seal of the shaft is normal, whether the shaft heater fan is in fault or the negative pressure of the shaft heater is low, start the standby fan, check whether the exhaust system of the small turbine is normal, if necessary, start the electric pump, stop the small turbine and close the exhaust butterfly valve.

Check whether the sealing water of the condensate pump is normal and whether the condensate pump leaks air; whether the water level of the condenser is too high; if the vacuum of the condenser drops to - 87kpa, the standby water ring vacuum pump unit will start automatically, otherwise it will be put into operation manually; if the vacuum continues to drop, the load shall be reduced; if the vacuum drops to - 84kpa, the load shall be reduced to zero; if the vacuum drops to - 81kpa, the trip protection shall act, otherwise, the shutdown shall be manually tripped.

Dry Type Oilless Vacuum Pumps

Rotary Vane Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Pipeline design of water ring vacuum pump unit

Before using the water ring vacuum pump unit, it is necessary to design the pipeline route, because the pipeline is the main device to send and pump flammable and explosive gas. Once the pipeline route is unreasonable, it will easily lead to various troubles. Therefore, it is necessary to design a reasonable pipeline route, which is conducive to the work efficiency and stability of the unit in the later stage. So how to design a reasonable pipeline?

1. The shorter the interval between the fragmentary outlet of the water ring vacuum pump unit and the inlet of the pump, the better.

2. The less pipe turns, the better.

3. The outlet pipe shall be higher than the inlet line of the pump, and the outlet pipe shall be prevented from factors that cause greater resistance, such as climbing on the outlet pipe, right angle turning, etc.

4. The diameter of the matching inlet and outlet pipe should be different from the diameter of the commodity inlet and outlet. For example, if the vacuum is small, the receiving diameter of the matching inlet and outlet pipe can be small, but not less than 70% of the commodity inlet and outlet diameter, and the outlet diameter should be greater than or equal to the inlet pipe diameter.

5. The bend of the pipeline shall be smooth.

6. The water inlet pipeline of vacuum pump unit shall be equipped with valves to regulate the amount of water inlet, which has an impact on the vacuum degree. When regulating the water inlet, the valve shall be controlled by checking the pointer of the vacuum gauge.

Therefore, in order to ensure the normal operation of the water ring vacuum pump unit, it is necessary to achieve the correct installation, operation specifications, maintenance, etc., and all these premises are to ensure that the design of the equipment is reasonable first, otherwise the unreasonable equipment, no matter how it is operated, will not be correct, so whether it is the equipment or anything, it is necessary to lay the foundation premise first, and then carry out the next operation.

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Difference Of Vacuum Pump Oil, Compressor Oil And Refrigeration Oil

Water Ring Pump

Sealing form of 2BV water ring vacuum pump

In order to make you better use of 2BV water ring vacuum pump, today I sorted out some information about its sealing form for you.

1. Packing seal is to put the packing rich in compressibility and resilience into the packing box of 2BV water ring vacuum pump, and convert the axial compression force of the gland into radial sealing force, so as to play a sealing role.

2. Power seal: when the vacuum pump is running, the pressure head produced by the auxiliary impeller balances the high-pressure liquid at the outlet of the main impeller, so as to realize the seal.

3. Oil seal seal is a self tightening lip seal, which has simple structure, small size, low cost, convenient maintenance and small resistance torque. It can not only prevent medium leakage, but also prevent external dust and other harmful substances from entering 2BV vacuum pump.

4. The labyrinth seal of 2BV water ring vacuum pump has a good sealing effect when it is designed reasonably, processed well, assembled well and rotated at a high speed.

The sealing of 2BV water ring vacuum pump is mainly to improve the efficiency of the equipment. When sealing, you can choose any method.

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rotary vane vacuum pump working principle and application

Most of the rotary vane vacuum pumps are small and medium vacuum pumps. There are two types of rotary vane vacuum pump: single stage rotary vane vacuum pump and double stage vacuum pump. The so-called two-stage rotary vane vacuum pump is to connect two single-stage pumps in series in structure. Generally, it is made of two-stage to obtain a higher vacuum. The relationship between the pumping speed and the inlet pressure of the rotary vane vacuum pump is as follows: under the inlet pressure of 1333pa, 1.33pa and 1.33 × 10-1 (PA), the pumping speed shall not be lower than 95%, 50% and 20% of the nominal pumping speed of the pump respectively.

The working principle of two-stage pump is composed of two single-stage pumps in series. During operation, the extracted gas enters the high vacuum stage through the suction tube first. When the suction gas pressure is high, one part of the gas is discharged by the exhaust valve 2, and the other part is discharged by the exhaust valve 1 through the low vacuum stage. When the suction pressure is low, though compressed by high vacuum level, exhaust valve 2 can't be opened for exhaust, so it can only be compressed by low vacuum level and discharged by exhaust valve 1, because the limit vacuum of two-stage pump is higher than that of single-stage pump.

Vacuum pump is widely used in metallurgy, machinery, military industry, electronics, chemical industry, light industry, petroleum, medicine and other production and scientific research departments. It has been widely used in food vacuum packaging and plastic industry vacuum forming. Paper conveying, vacuum fixture and vacuum suction in printing industry.

What Is A Single Stage Rotary Vane Vacuum Pump

Water Ring Pump

Water Ring Vacuum Pump

Basis and conditions of vacuum pump selection

1. System requirements for vacuum degree

According to the requirements of the system for vacuum degree, the pump with corresponding limit vacuum is selected. Generally, the limit vacuum of the pump is 0.5-1 order of magnitude higher than that of the system.

2. Pressure range during normal operation of the system

The pressure range required for normal operation of the pump must meet the working pressure required by the system.

3. The type, composition, impurity of the extracted gas and the limit requirements for pollution during the operation of the system

The properties of the extracted gas and the requirements for pollution are important conditions for the selection of vacuum pumps with different characteristics. It is not only related to the performance of the pump at work, but also directly related to the working life and maintenance of the pump. Especially in the chemical production, it is often a key factor in the correct selection of the pump. Micro pump manufacturer

4. Air volume or volume flow of the system

This is the main basis for choosing a certain type of vacuum pump. Just like the micro vacuum pump, the average flow of air extraction is 6L / min, and the peak flow is 10L / min, which is the main parameter different from other products.

Water Ring Vacuum Pump manufacturers

What is water ring vacuum pump

Liquid Ring Vacuum compressor

mechanical vacuum pump brief introduction

A pump that uses mechanical movement (rotation or sliding) to obtain vacuum is called a mechanical vacuum pump. According to its working principle and structural characteristics, mechanical vacuum pump can be divided into the following categories: variable capacity vacuum pump: it uses the periodic change of pump cavity volume to complete the work of the pump. Suction and discharge. A vacuum pump for pumping water. The gas is compressed before leaving the pump room. This type of pump is divided into two types: reciprocating pump and rotary pump.

Reciprocating vacuum pump: reciprocating the piston in the pump room to suction, compress and discharge gas. This product is also called piston vacuum pump. The vacuum degree of this kind of product is usually about 1330pa, and the normal working pressure is 1330pa? 105Pa. It is mainly used for the process of removing air or containing a small amount of condensable gas, and the vacuum degree is not high.

Such as vacuum molding, vacuum concentration, vacuum impregnation, material vacuum transportation and other processes, rotary vacuum pump: This product uses the rotary motion of the rotor components in the pump room to pump, compress and discharge gas. It has the following classification: oil seal vacuum pump: it is a rotary variable displacement vacuum pump, which uses vacuum pump oil to seal the gap between moving parts in the pump and reduce harmful space in the pump.

Such pumps usually have gas ballast. It mainly includes rotary vane vacuum pump, fixed plate vacuum pump, slide valve vacuum pump, cycloid vacuum pump, etc. the vacuum degree of such products is generally about 0.05 to 0.5pa, and the normal working pressure is 0.5 to 103pa or higher. It is mainly used to remove air or contain a small amount of condensable gas and need high vacuum process.

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Water Ring Pump

Water Ring Vacuum Pump

Understand the operation of water ring vacuum pump

When using the water ring vacuum pump, we need to pay attention to water as a very common working fluid or coolant, which plays an indispensable role in the normal operation of the water ring vacuum pump and the water ring vacuum degree. Pump can also be recycled, but only need to pay attention to some details to avoid unnecessary trouble.

Here, we will especially understand the problem of using the working fluid of water ring vacuum pump: when the working fluid is recovered, it can be kept free of impurities. If it is to be recycled, it needs to be used together with water tank and cooling device. The recommended operating water temperature is 15-25 ° C. high water temperature will affect the performance of the pump equipment, such as vacuum degree and pumping capacity.

2BV water ring vacuum pump generally needs to increase equipment cooling, more importantly, on-site process and temperature regulation. In fact, most industries reuse circulating water. If water can be used, it is waste, but circulation pipeline must be installed. Generally, the working fluid of water ring vacuum pump shall be industrial soft water.

The water ring vacuum pump has certain requirements for water temperature and water quality when it works, mainly to avoid the corrosion of internal impeller and other components, and whether the vacuum generated is pure. Generally, for the purpose of recycling water, it can save resources, try to use industrial soft water, so as to avoid damage to equipment, better achieve the purpose of multiple water use, achieve the purpose of environmental protection, and save resources.

Two Stage Liquid Ring Vacuum Pump Details

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Application and main classification of vacuum pump in chemical plant

Any pressure below atmospheric pressure is called vacuum. The degree of vacuum is the degree below atmospheric pressure, which is usually expressed as a percentage or millimeter of water (or mercury). If the vacuum degree of a certain equipment is 80%, it means that the pressure in the equipment is changed to 20% of the atmospheric pressure, that is, when the atmospheric pressure is 1 kg / cm², the pressure in the equipment is 0.2 kg / cm². Therefore, when the degree of vacuum is expressed as a percentage, it indicates the degree to which the gas is extracted. When expressed in millimeters of water column, it indicates its residual pressure. If the vacuum in the device is 3x10-2 millimeters of water column, it means that the pressure in the device (that is, the residual pressure) is 3x10-2 millimeters of water column.

In chemical plants, certain production processes are often performed under atmospheric pressure, such as vacuum evaporation, vacuum distillation, and vacuum filtration.

In order to reach the vacuum, it is necessary to have a device that extracts the gas-a vacuum pump. Vacuum pumps can be roughly divided into reciprocating, rotary and jet pumps.
Reciprocating vacuum pump

The principle of the reciprocating vacuum pump and the reciprocating compressor are exactly the same, except that the air distribution mechanism, that is, the intake and exhaust valves are different. Spring valves are generally used in reciprocating compressors, and so-called slide valve air distribution mechanisms are mostly used in reciprocating vacuum pumps.

2.Water ring vacuum pump

Water ring vacuum pump is a kind of rotary vacuum pump. In addition to pumping gas, it can also be used for compressed gas. E.g

The maximum pressure of PMK-2 water ring vacuum pump exhaust gas can reach 1.5 kg / cm², so it is also called water ring compressor. This type of pump should avoid solid particles entering the pump body during operation.

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Method for obtaining vacuum of vacuum pump


The obtaining of vacuum is the main component of vacuum technology. With a variety of methods, a certain degree of vacuum can be obtained in the pumped container. The range of currently available vacuum is quite wide, from 100kPa to 10-11Pa. In other words, it should be from 100kPa to 10-4Pa.

Therefore, different methods should be used to obtain vacuum according to different vacuum requirements and use conditions. The existing methods to obtain vacuum can be roughly divided into the following three categories: vacuum pumps (such as mechanical pumps, diffusion pumps, etc.), getters (red Phosphorus, barium aluminum, titanium, ZrAl16, etc.) and vapor traps (cold traps, dryers, etc.). In the electric light source industry, the main means to obtain a vacuum is to rely on a mechanical vacuum pump and a vapor flow diffusion vacuum pump.

Circulating Water Vacuum Pump Troubleshooting https://www.evpvacuum.com/circulating-water-vacuum-pump-troubleshooting.html

Vacuum Pump Air Leakage
http://www.evpvacuum.com/vacuum-pump-air-leakage.html

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Component structure of oil-free vacuum system


In recent years, it has been found that vacuum systems that use mechanical vacuum pumps and diffusion pumps to evacuate, because it has enough oil vapor to flow back into the pumped container or device, the performance and technical indicators of many electronic devices are seriously affected. For example, the oxide cathode of an electronic tube reduces its emission performance and life due to oil vapor. Various high-power high-voltage electronic tubes are prone to electrical breakdown due to the presence of oil vapor. The presence of the oil significantly reduces its pressure resistance index, and oil vapor has a significant adverse effect in many places.

Therefore, the vacuum systems used in these areas are required to be replaced by oil-free vacuum systems, that is, instead of using vacuum oil sealing tools (such as mechanical pumps, diffusion pumps) that use vacuum oil seals and vacuum oil as the working fluid, Adsorption of gas molecules, adsorption pumps and pumps that reduce the pressure in the container to obtain the required vacuum.

The adsorption pump uses the porous surface of certain solid materials to strongly adsorb gas in a cold state, so that the closed system obtains a low vacuum of 10-2 mm mercury column. It is used as the front stage of an oil-free system .

Generally, in addition to activated carbon, the adsorbent used by the adsorption pump uses a molecular sieve (artificial zeolite) to adsorb the gas and obtain a vacuum. Because, after cooling with liquid nitrogen, each kilogram of molecular sieve can draw a 50-100 liter container from the atmosphere into a vacuum of 10-2 mm mercury column, so it is a kind of pump with a large air intake. After it is baked at about 400 ° C, the gas it absorbs is released again (called activation or regeneration), and the ability to re-inhale is restored. 5A molecular sieves currently used (large absorption capacity, suitable for exhausting air, but need to be "activated, with an average pore size of about 5 Angstroms) and 13X molecular sieve (its adsorption capacity is smaller than 5A molecular sieve, but it can absorb oil vapor molecules) .

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Anticorrosion method of water ring vacuum pump

Water ring vacuum pump is used and pumped, so it can pump out inflammable and explosive gas, in addition, it can also pump out the gas containing dust and water, so it is inevitable that it will be corroded after long use, so how should we carry out anti-corrosion operation when we use it? Let's see the introduction of technical points of anti-corrosion first.

1. For the material application of water ring vacuum pump, apply a thin layer of material first to ensure the bonding and full coverage, and then evenly apply the material to the repair surface to achieve the required repair thickness.

2. It is very important to mix the materials when applying the water ring vacuum pump. Mix them strictly according to the proportion and mix them evenly until there is no color difference.

3. Conduct surface treatment for water ring vacuum pump, thoroughly remove the surface oxide layer, and clean the surface with acetone.

The above is the introduction of the key points of the anti-corrosion technology of the water ring vacuum pump. Because it is isothermal in compressed gas, it is widely used, so we should do a good job of maintenance for it. The anti-corrosion is just one of the above, we operate according to the correct methods.

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Pipeline Installation of Liquid Ring Vacuum Pump

What problems should we pay attention to when installing the pipeline of the liquid ring vacuum pump?

(1) All pipelines of liquid ring vacuum pump should be checked for sealing before installation, and the internal iron chips, rust and oil stains should be cleaned up.

(2) Reliable sealing gaskets, especially vacuum pipelines, should be used at the flange joints of pipelines, and the sealing requirements should be stricter.

(3) The intake pipeline is connected with the inlet of the liquid ring vacuum pump, and the exhaust pipeline is connected with the outlet of the separator water tank.

(4) Gate valves should be installed on the intake pipe near the liquid ring vacuum pump to prevent the water in the pump from flowing down to the intake pipe under the pressure of the exhaust pipe when the pump stops.

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2BE1505 Vacuum Pump

SK liquid ring vacuum pump, as a kind of vacuum pumping equipment commonly used in manufacturing industry, mainly plays the role of pumping in the whole production. What kind of use does SK liquid ring vacuum pump play in sugar industry?

1. Vacuum filtration, evaporation concentration and evaporation crystallization all need to be completed in vacuum during the whole process of sugar making. Therefore, it is strictly required that it can work continuously and continuously for a long time, and has high durability.

2. In the filtration process of sugar industry, SK liquid ring vacuum pump is needed to pump gas in the whole sugar production process, so it is required to pump gas with high water content.

3. In sugar making, the pumping capacity of SK liquid ring vacuum pump must be large and stable when working in high vacuum.

4. At the same time, it is also required to have good wear resistance to meet the working environment and requirements of sugar industry.

In sugar making enterprises, SK liquid ring vacuum pump can use the vacuum it produces to preserve sugar and prolong its shelf life. In addition, it can remove excess water, prevent sugar from dampness, and its wear resistance is good.

Roots vacuum pump
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Rotary Piston Vacuum Pump
Dry Type Vacuum Pump

Vacuum coating technology is an important branch of vacuum application technology. It is widely used in the fields of electronics, optics, energy development, physical and chemical instruments, packaging, civil products, engineering machinery, general science and scientific research. The main methods of vacuum plating are evaporation plating, sputtering plating, ion plating, beam deposition plating and molecular beam epitaxy. In addition, there are chemical vapor deposition. If the purpose of coating with oil-free vacuum pump is to change the physical and chemical properties of materials, the process is also an important part of the vacuum coating process.

Firstly, in optics, the outline of optical glass or quartz is covered by one or more layers of bifurcation material film, and the oil-free vacuum pump can be made into high reflection or non-reflection (i.e. anti-reflection film) or reflection or transmission material at any required ratio. It can also be used as a filter for receiving one wavelength and transmitting another. From large-aperture astronomical telescopes and lasers to jasmine flowers on windows of new buildings, high-reflective coatings are needed. Antireflective coatings are widely used in photography and various types of lasers, starting with coated glass for new building windows. Antireflective coatings are widely used in cameras and TV cameras. Vacuum coating plays an important role in electronic technology.

Various scales act as circuits. Memories, calculators and indicative logic elements should use conductive, insulating and protective films. Oil-free vacuum pumps are used as masks for manufacturing circuits. Tapes, disks, semiconductor lasers, Josephson devices, charge coupled devices (CCDs) have also been thrown away.

The oil-free vacuum pump, video head, high density video tape and transparent conductive film in flat panel display device, photoconductive film of camera tube and aluminium lining of fluorescent screen of display tube are also prepared by vacuum coating method. In terms of components, nickel-chromium, chromium or cermet evaporated in vacuum can be made into resistors, aluminium, silica and titanium dioxide evaporated on plastics can be made into capacitors, selenium evaporated can be made into selenium drums of electrostatic copiers, barium titanate evaporated can be made into magnetostrictive acoustic elements, etc. Evaporation can also be used to fabricate superconducting thin films and bead coatings to reflect the great changes in inertial confinement.

In addition, it can also produce superhard films such as jewelry, case, textile metal pattern, gold and silver wire, oil-free vacuum pump, sputtering or ion plating tools, dies and so on. In recent years, titanium products such as stainless steel plate, mirror, railings, handrails, bedstead and staircase railings have been prepared by multi-arc ion plating technology.

Oil Diffusion Vacuum Pump
Oil Booster Pump
Vacuum Sintering Furnace
Vacuum Debinding Furnace