1 Scope
This standard specifies the face-to-face dimensions of flanged metal reducing pressure valves.
This standard is applicable to flanged reducing pressure valves used for industrial pipelines, with the nominal pressure of PN10~PN160, the nominal dimension of DN15~DN500 and the operating temperature no greater than 425℃.
This standard may be referred to for the face-to-face dimensions of the reducing pressure valves connected by other forms.
2 Normative References
The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this document. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 21465-2008 Terminology for Valves
Foreword i
1 Scope
2 Normative References
3 Terminologies
4 Dimensions and Limit Deviations
Figure 1 Structural Style of Reducing Pressure Valve
Table 1 Face-to-face Dimensions
Table 2 Limit Deviations of Face-to-face Dimensions
