Vacuum pump oil viscosity

The viscosity of vacuum pump oil refers to the viscosity of the lubricating oil used inside the vacuum pump. The viscosity of lubricating oil is very important for the operation of vacuum pumps, as it directly affects the performance and lifespan of the pump. Inside the vacuum pump, lubricating oil needs to undertake multiple tasks. Firstly, it needs to lubricate the various components of the pump to reduce wear and friction. Secondly, it needs to cool the various components of the pump to prevent overheating. Finally, it needs to seal the various components of the pump to prevent gas leakage. Therefore, the viscosity of lubricating oil must be within a certain range to ensure that it can complete these tasks. If the viscosity of the lubricating oil is too low, it will not be able to lubricate the various components of the pump, resulting in increased wear and friction, thereby shortening the life of the pump. If the viscosity of lubricating oil is too high, it will not be able to flow to various components of the pump, resulting in poor cooling and sealing effects of the pump, thereby affecting the performance of the pump. Therefore, choosing the appropriate lubricating oil is very important. Generally speaking, the viscosity of vacuum pump oil should be between ISO VG 32 and ISO VG100. ISO VG32 is suitable for low temperature and low load applications, while ISO VG100 is suitable for high temperature and high load applications. When selecting lubricants, factors such as high temperature resistance, oxidation stability, and corrosion resistance should also be considered.

The viscosity of vacuum pump oil is crucial for the performance and lifespan of the pump. Choosing appropriate lubricating oil can ensure the normal operation and long-term use of the pump.

1、 Principle of viscosity selection

Choosing oil viscosity is one of the important factors affecting the performance of vacuum pumps. The viscosity of a liquid is the resistance of its flow, or in other words, the internal friction force of the liquid. The higher the viscosity, the greater the resistance to the movement speed of various components, the higher the temperature rise, and the greater the power loss; If the viscosity is too low, the sealing performance of the pump will deteriorate, causing gas leakage and deteriorating vacuum. Therefore, the selection of oil viscosity for various vacuum pumps is extremely important, and the principles for selecting oil viscosity are:

A. The higher the pump speed, the lower the viscosity of the selected oil.

B. The higher the linear velocity of the pump rotor, the lower the viscosity of the selected oil.

C. The higher the machining accuracy of pump components or the smaller the gap between friction parts, the lower the viscosity of the selected oil.

D. When using a vacuum pump under high temperature conditions, it is advisable to choose a higher viscosity of the oil.

E. Vacuum pumps with cooling water circulation are generally recommended to use oil with lower viscosity.

2、 Recommended viscosity range for vacuum pump oil

Based on the above principles, the recommended viscosity range for various types of vacuum pump oils is as follows:

A. The piston vacuum pump (W-type) can use ordinary engine oil, and V100 and V150 viscosity grade oil can be used.

B. The rotary vane vacuum pump (2X type) uses V68 and V100 viscosity grade oil products.

C. The direct (high-speed) rotary vane vacuum pump (2XZ type) uses V46 and V68 viscosity grade oil products.

D. The slide valve vacuum pump (H-type) uses V68 and V100 viscosity grade oil products.

E. The residual cycloidal vacuum pumps (YZ, YZR) use V100 and V150 viscosity grade oil products.

F. The lubrication of the gear transmission system of Roots vacuum pump (mechanical booster pump) can use V32 and V46 vacuum pump oil.

G. Other types of vacuum pumps can choose corresponding oil products based on their rotational speed, processing accuracy, ultimate vacuum, etc

Negative Leak Test Machine 

Technical parameters:

Brief introduction:

Negative Leak Test Machine suitable for sealing test food, drugs, cosmetics, industrial products such as flexible packaging, bottle packaging, packaging materials such as barrels, MFY-05 negative pressure test mode, automatic chronograph automatic replenishment vacuum packaging are fully automated high-precision inspection drain devices. Sealing process and sealing performance can be effectively tested and evaluated by comparing the flexible parts, widely used in food, plastic flexible packaging, wet wipes, pharmaceutical, cosmetic and other industries tightness testing.

Features:
1. Microcomputer control digital display test vacuum degree
2. Digital preset test the degree of vacuum and vacuum hold time, to ensure the accuracy of the test data
3. The use of high quality system components, stable and reliable performance
4. Automatic constant qi further ensure that the test can be carried out under vacuum conditions preset
5. Automatic constant pressure gas
6. Automatic end of the trial
7. Automatic cleaning uninstall

Test Principle:
Through the vacuum chamber is evacuated, so that the sample immersed in water to generate external pressure, observing the sample gas to escape, as a means to determine the sealing properties of the specimen; may be evacuated by the vacuum chamber, the sample to produce internal and external pressure, swelling and release the sample specimen shape recovery after vacuum infiltration and liquid observation, as a means to determine the sealing properties of the sample.