This standard specifies the structural type, technical requirements, test methods, inspection rules and marking of the pilot operated pressure reducing valves.
This standard is applicable to the pilot operated pressure reducing valves used for pipeline and their nominal pressure is PN16~PN63, nominal dimension is DN20~DN300 and the working medium is gas or liquid.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this national standard. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest editions of the normative documents are applicable to this Part.
GB/T 12246-2006 The following standards are cited：
