This standard specifies the quality grade of air medium used in pneumatic components and systems. JB/T 5967-1991 Quality grade of air medium used in pneumatic components and systems JB/T5967-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T5967-1991
Air Medium for Pneumatic Components and Systems
Quality Grade
Published on December 11, 1991
Implementation by the Ministry of Machinery and Electronics Industry of the People's Republic of China on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Air Medium for Pneumatic Components and Systems
Quality Grade
Subject Content and Scope of Application
This standard specifies the quality grade of air medium for pneumatic components and systems. This standard is applicable to the classification of quality grades of air medium for pneumatic components and systems. 2 Terminology
2.1 Contaminants
JB/T5967-1991
Any solid, liquid, gaseous substance or its combination that has an adverse effect on pneumatic components, pneumatic systems or operators. 2.2 Solid particles
Suspension of solid particles or liquid droplets suspended in a gas medium or solid and liquid particles with a very small falling speed (falling speed is usually less than 0.25m/s).
2.3 Dew point
Temperature at which water vapor begins to condense.
2.3.1 Pressure dew point
Dew point of compressed air under actual pressure (pressure value should be specified). 2.3.2 Atmospheric dew point
Dew point measured under atmospheric pressure.
2.4 Relative vapor pressure
Ratio of water vapor partial pressure to saturation pressure at the same temperature. Expression method
Air medium quality grade is expressed by three Arabic numerals. If there is no requirement for a certain pollutant, "two" is used instead. Oil content level (see Table 3)
Water vapor content level (see Table 2)
Solid particle content level (see Table 1)
Example:
a, when the solid particle content in the air medium is level 2, the water vapor content is level 3, and the oil content is level 4, it means that the air medium quality level is 2, 3, and 4.
b, when the solid particle content in the air medium is level 3, there is no requirement for water vapor content, and the oil content is level 5, it means that the air medium quality level is 3, 1, and 5.
Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on December 11, 1991 and implemented on July 1, 1992
3.2 Quality level
3.2.1 Solid particles
The solid particle content level shall be as specified in Table 1.
Maximum particle size, μm
JB/T5967-1991
Maximum concentration, mg/m2www.bzxz.net
Maximum particle size, um
Note: Particle concentration is the concentration under the conditions of absolute pressure of 0.1MPa, temperature of 20℃ and relative vapor pressure of 0.6MPa. 3.2.2 Water vapor
Maximum concentration, mg/m2
The water vapor content in compressed air is expressed as pressure dew point. When a lower pressure dew point is required, it must be specially indicated. The level of pressure dew point is specified in Table 2.
Maximum pressure dew point, ℃
The oil content level is specified in Table 3.
Maximum oil content, mg/m
Maximum pressure dew point, ℃
Maximum oil content, mg/m
Note: ① The oil content is the oil content under the conditions of absolute pressure of 0.1MPa, temperature of 20℃, and relative vapor pressure of 0.6MPa. ② This oil content does not include the oil provided by the oil mist device. The quality grade of air medium commonly used for pneumatic components The quality grade of air medium commonly used for pneumatic components is selected according to Table 4. 2
Directional valve
Names of common pneumatic components
Cylinder (reciprocating)
Heavy air motor
Light air motor
Air turbine
Jet element
Logic element
Sliding type
Gap seal
Soft seal
Stop type
Air bearing
Pneumatic control valve
Quality grade of air medium for general system
JB/T59671991
Solid particles
The quality grade of air medium for general system shall be selected according to Table 5. Table 5
General system name
Precision machinery manufacturing
Air loom
General workshop
Food and beverage processing
Electronic devices
Casting machinery
Photographic film manufacturing
Packaging machinery
Mining machinery
Welding machinery
Machine parts cleaning
Solid particles
Quality grade
Water vapor
Gas medium quality grade
Water vapor
JB/T59671991
Appendix A
Selection of air source purification system
(reference)
Select a suitable air source purification system according to the purpose, characteristics and requirements of pneumatic components and pneumatic systems. A1
, the following block diagram shows the air source purification system according to different purification requirements. For some applications with requirements higher than level 1, A2
, you can consider separately, and pay attention to the influence of environmental conditions on the selection of the system. For example, according to the different environmental conditions of product use, the pressure dew point can be allowed to be 10℃ lower than the lower limit of the product's ambient temperature; for example, when the movable parts of various air valves, cylinders, air motors, etc. used in pneumatic systems need to be lubricated, an oil mist device should be installed in the air source purification system. Examples of A3 air source purification system:
Oil compressor
Aftercooler
Heatless regenerative dryer
Solid particles
Water separation filter
Air storage tank
Large sewage discharger
A large sewage discharger
Dust removal precision filter
Water vapor
Air medium quality grade
High-efficiency oil remover
Scope of application: pneumatic instruments,
automatic control, precision machinery manufacturing, advanced painting, electronic components, etc. A3.2
Oil compressor
Refrigerated dryer
Aftercooler
Water separator
Gas storage tank
Large drainer-large drainer
Precision filter
Solid particles
Water vapor
Air medium quality grade
Scope of application: air spinning, air loom, chemical fiber, cigarette, glass processing, etc. A3.3
Oil compressor
Air filter
Aftercooler
Water separator
Air storage tank
Large drainer
A large drainer
Air medium quality grade
High efficiency sleeve remover
High efficiency oil remover
Solid particles
Scope of application: General workshop gas, construction and civil engineering machinery, parts cleaning, welding machine, etc. Water vapor
Oil-free compressor
Refrigerated dryer
Air medium quality grade
Aftercooler
Precision filter
JB/T5967-1991
Water separation filter
Gas storage tank
Large-scale drainer-large-scale drainer
Oil removal filter
Solid particles
Water vapor
Scope of application: antibiotics, beer fermentation, food and beverage processing, etc. Additional remarks:
This standard was proposed and managed by Wuxi Pneumatic Technology Research Institute. This standard was drafted by Wuxi Pneumatic Technology Research Institute. The main drafter of this standard is Xue Quanzhen.
Deodorizer
High-efficiency degreaser
Sterilizer
People's Republic of China
Mechanical Industry Standard
Air medium for pneumatic components and systems
Quality grade
JB/T59671991
Published and distributed by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing||tt| |Postal code 100044)
Printing sheet 1/2
Format 880×1230
Word count 10,000
First edition in June 1992
First printing in June 1992
Print run 1-500
Price 5.00 yuan
Mechanical Industry Standard Service Network: http://www.JB.ac.cn1661_96
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