JB/T 58351-1999 Pneumatic directional control valve reliability assessment specification

JB/T 58351-1999 This standard is a revision of JB/T 58351-92 "Reliability Assessment Specification for Pneumatic Solenoid Directional Valves". This standard specifies the reliability assessment and evaluation indicators, verification test methods, and judgment rules for pneumatic directional valves. This standard is applicable to the reliability assessment of pneumatic solenoid directional valves and solenoid pilot valves with a nominal diameter of less than 25mm. This standard was first published on the date of year. JB/T 58351-1999 Reliability Assessment Specification for Pneumatic Directional Valves JB/T58351-1999 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T58351-1999
Reliability Assessment Specification for Pneumatic Directional Valve
(Internal Use)
1999-12-30 Issued
National Mechanical Industry StandardbZxz.net
2000-06-01 Implementation
JB5351-1
This standard is a revision of the reliability assessment specification for pneumatic or magnetic reversing valves: Revision: The original standard name was changed to "Reliability Specification for Pneumatic Directional Valve" and the original standard was revised. The main technical content has been changed:
This standard is proposed by the Pneumatic Standardization Technical Committee of the People's Republic of China. This standard originates from: Wuwei Pneumatic Technology Research Institute, this standard originates from: Zha Zhenshan, Yang Ranran, Chen Ning, scope
Machinery Industry Standard of the People's Republic of China
Reliability Assessment Specification for Pneumatic Directional Valves
(Internal Use)
JO/T58351-1999
Code $835192
This standard defines the performance assessment indicators for pneumatic valves, and the test force method is used to determine the reliability of pneumatic reversing and electromagnetic pilot valves with a nominal diameter of less than 25mm. 2. Referenced standards
The following test standards are included in the text, and the references in this standard constitute a small standard record. When this standard is issued, the new version will be effective. All marked parts will be revised. The latest version of the standard should be used to determine the possibility of not using the latest version of the following standards. [R/T6378-1992 Technical conditions for pneumatic reversing, definition
This standard adopts the following definitions:
J.1 First effect
The product has no fixed function.
This product is a non-repairable product. The first failure is considered invalid. Roughly obey the classification of 3.2 Mean life (mean time between failures) mean life (mean time between failures) average value, which is the average time before failure: written as MTTF in English. 4 Assessment requirements
4.1 Assessment criteria
Take the mean life (MTF) as the non-critical assessment index. Use the replacement time-interval life test verification and the analysis of the test data. The statistical principle of the pseudo-rate is used to put the test samples into the same time sequence as the allowable failure number as the direct judgment index, see Table 1. 4.2 Failure mode
One of the following manifestations is a failure:
1) The system may have abnormal phenomena such as suction, jamming, bonding, commutation and other delays: b! There is serious vertical image damage, aging, and metal, and the internal diffusion exceeds the technical provisions by 3%! c) Check the leakage end and find that there is rotten gas pool, strange noise
), continuous burning and softening of packaging materials.
Approved by the Bureau of Machinery Industry on December 30, 1999, implemented on June 1, 2000
MTTT 1:0*
Verification test
5.1 Test conditions
: Second edition
JB/T58351—1999
Test expansion 4
(Taiwan)
Specification
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Related information
Test medium, environmental conditions, power supply requirements, instruments, equipment and their accuracy requirements as specified in the test method of 16378+10. 5.2 Test sample A
5.2.1 Selection method
5.2.1.! The test samples shall be drawn from the batch production or product library after verification. 5.2.1.1 Draw samples according to the test duration and the corresponding number of test samples specified in Table 1. The sampling basis shall not be less than 2 pieces of the sampled quantity.
5. 3 Verification test method
Verify that the test capacity is the same as the endurance performance test of the product standard. Record the number of reversals until the desired time or until the failure sample exceeds the allowable failure number specified in the table. The sample shall not be disassembled, refueled, cleaned or repaired from the start of the test to failure or the end of the test.
6 Judgment rule
If the maximum effective sample number does not exceed the allowable effective number specified in Table 1, the product is considered to have passed the reliability assessment; if the maximum effective sample number does not exceed the allowable failure number specified in Table 1, the product is considered to have failed the reliability assessment.
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