JB/T 58351-1999
Reliability Assessment Specification for Pneumatic Directional Control Valves
气动换向阀可靠性考核规范
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 定义 → 4 考核要求 → 5 验证试验 → 6 判定规则 Foreword → 1 Scope → 2 Normative References → 3 Definitions → 4 Assessment Requirements → 5 Verification Test → 6 Judgment Rules
Scope
This standard specifies the reliability assessment evaluation indicators, verification test methods, and judgment rules for pneumatic directional control valves. This standard applies to the reliability assessment of pneumatic solenoid directional control valves and solenoid pilot valves with nominal bore sizes below 25 mm.
本标准规定了气动换向阀的可靠性考核评定指标、验证试验方法、判定规则。本标准适用于公称通径25 mm 以下的气动电磁换向阀与电磁先导阀的可靠性考核。
Normative References
Keywords
Application Summary AI generated
Manufacturers and testing organizations of pneumatic directional control valves use this standard to assess product reliability. Through specified test methods and judgment rules, they evaluate the mean time between failures (MTTF) to ensure products meet quality requirements. This standard is important for improving the reliability of pneumatic components and overall industry quality.
气动换向阀的制造商和检测机构使用本标准来考核产品的可靠性水平。通过规定的试验方法和判定规则，可以评估阀门的平均无故障工作时间（MTTF），确保产品满足质量要求。该标准对于提高气动元件的可靠性和行业整体质量水平具有重要意义。
AI Summary AI generated
This standard specifies the reliability assessment method for pneumatic solenoid directional control valves and solenoid pilot valves with nominal bore sizes below 25 mm. It uses mean life (MTTF) as the assessment indicator, employing non-replacement timed censored life tests for verification, with allowable failure numbers determined by test censoring time and sample size. The standard details failure modes including abnormal switching, leakage, and coil burnout. Test conditions follow JB/T 6378, samples are drawn from qualified products with a sampling base at least twice the sample size. The judgment rule is clear: if the number of failures does not exceed the allowable limit, the product passes; otherwise it fails.
本标准规定了公称通径25mm以下气动电磁换向阀和电磁先导阀的可靠性考核方法。以平均寿命（MTTF）作为考核指标，采用无替换定时截尾寿命试验进行验证，根据试验截尾时间和样本数量确定允许失效数。标准详细列出了失效模式，包括换向异常、泄漏、线圈烧损等。试验条件按JB/T 6378执行，样本从合格产品中抽取，抽样基数不少于2倍。判定规则明确：失效数未超过允许值则合格，否则不合格。
Key Sentences extracted from text
本标准规定了气动换向阀的可靠性考核评定指标、验证试验方法、判定规则。
本标准适用于公称通径25 mm 以下的气动电磁换向阀与电磁先导阀的可靠性考核。
以平均寿命（MTTF）作为换向阀的可靠性考核指标。
采用无替换定时截尾寿命试验验证及对试验数据的分析处理，根据概率统计原理取不同截尾时间应投入试验样品下的允许失效数作为直接判定指标，见表1。
试验至截尾时间，若失效样本数未超过表1 规定的允许失效数，则认为该产品可靠性考核合格；若失效样本数超过表1 规定的允许失效数，则认为该产品可靠性考核不合格。
This standard specifies the reliability assessment evaluation indicators, verification test methods, and judgment rules for pneumatic directional control valves.
This standard applies to the reliability assessment of pneumatic solenoid directional control valves and solenoid pilot valves with nominal bore sizes below 25 mm.
The mean life (MTTF) is used as the reliability assessment indicator for directional control valves.
Using non-replacement timed censored life test verification and analysis processing of test data, the allowable number of failures under different censoring times and sample sizes to be tested is taken as the direct judgment indicator according to probability and statistics principles, see Table 1.
If by the censoring time the number of failed samples does not exceed the allowable number of failures specified in Table 1, the product is deemed to have passed the reliability assessment; if the number of failed samples exceeds the allowable number of failures specified in Table 1, the product is deemed to have failed the reliability assessment.
Standard Timeline
Changes from replaced version:
- 标准名称由《气动电磁换向阀可靠性考核规范》改为《气动换向阀可靠性考核规范》
- 对原标准作了编辑性修改
- 主要技术内容没有变化
- Standard name changed from 'Reliability Assessment Specification for Pneumatic Solenoid Directional Control Valves' to 'Reliability Assessment Specification for Pneumatic Directional Control Valves'
- Editorial modifications were made to the original standard
- Main technical content remained unchanged