American standard pneumatic valve size quality standard is what

standard number: JB/T -
the standard name: Vacuum pneumatic valve standard state:

current English title: Vacuum valves
alternative: JB/T - JB / T - JB / T - JB / T - JB / T - JB / T -
the implementation date: - -
issued by departments: the National Development and Reform Commission of the People's Republic of China
content abstract: this standard specifies the vacuum pneumatic valve type and basic parameters, technical requirements, test methods, inspection rule, marks, packaging, transport and storage. Number:
standard JB/T -
the standard name: pneumatic valves with low temperature steel casting technology conditions standard state:

current English title: Technical specification for low temperature service steel casting for valves
alternative: instead of JB/T -
the implementation date: - -
issued by departments: the National Development and Reform Commission of the People's Republic of China
content abstract: this standard specifies the pneumatic valve with low temperature steel casting technical requirements, test methods, inspection rule and marks.
this standard applies to - ℃~ - ℃ low temperature under the condition of using pneumatic valve, flange and other pressure casting.