GB/T 4974-1989 Priority pressure for compressors, rock drilling machines and pneumatic tools

GB/T 4974-1989 Priority pressure for compressors, rock drilling machines and pneumatic tools GB/T4974-1989 Standard download decompression password: www.bzxz.net

UDC6215I/:54:532.11
National Standard of the People's Republic of China
GB 4974—89
Compressors, rock driling machines and pneumatic tools
Preferred pressures
Compressors, rock driling machines and pneumatic tools Preferred pressures
Published in 1989-02-22
Implemented in 1989-09-01
Published by the State Technical Supervision Bureau
National Standard of the People's Republic of China
Compressors, rock driling machines and pneumatic tools Preferred pressuresbzxZ.net
GB 4974—89
Replaces Japanese 4974—85
This standard is equivalent to the applicable international standard IS05941-1979 "Compression analysis, pneumatic tools and pneumatic machines priority function". 1 Applicable scope
This standard is used for compressors (also known as air compressors), air conditioners and gas or tools. It is for gauge pressure
2 Reference standard
BB2346 Hydraulic and pneumatic components and nominal pressure series 5 Air compressor rated pressure definition
The rated pressure specified in this standard is to meet the requirements of the main grade of 0.04~40M2# range determined by the domestic production and manufacturing plants.
Definition: It can be considered that the room pressure has a large flow or compensation capacity under a certain pressure. The priority rated pressure
The priority rated pressure is shown in the first column of Table 1: The first column of Table 1 is the cabinet pressure range of GB2346: The third step is the pressure value specified in the first guarantee document. This pressure is the nominal pressure or high pressure of air compressors, air compressors and their energy. Ministry of Electronics Industry of the People's Republic of China, approved on 16 October 1988, implemented on 1 September 1989
Nominal pressure (GB2316)
Rock lifting machinery and its power tools should not set the pressure in advance
Additional statement:
GB 4974—89
Check the pressure of the press machine and give priority to setting the pressure
Coal gear machine is! Pneumatic tools
Universal when rock machine micro and pneumatic tools
Replacement hole artifacts, etc.
Change hole impact, etc.
Use with other pressures
032. 3.35
0.5. 0.55
0.8.0.85. 0.9
:.4. 1.5. 1.6
This standard is for general purpose drilling machine research institute, Tianshui drilling machine lack of pneumatic research institute and responsible for the logistics car, 2
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