A pressure - temperature, degree-level 

 Multifunctional pump control valve of the pressure - temperature rating is determined by the pressure of the shell, the inner parts and the control tube system materials - temperature rating. Multifunctional pump control valve at a temperature of maximum allowable working pressure to take the shell, trim and control of the material of the pipe system to a small value the maximum allowable working pressure value at that temperature. 

 1.1 iron shell of the pressure - temperature rating shall comply with the provisions of GB/T17241.7. 

 1.2 steel shell of the pressure - temperature rating shall comply with the provisions of GB/T9124. 

 1.3 for GB/T17241.7, GB/T9124 not provide the pressure - temperature rating of the material, according to the relevant standards or design requirements. 

 2, valve 

 Flange, 2.1 body should be cast with the body as a whole. Iron flange type and size should meet GB/T17241.6 provisions, the technical conditions should be consistent with the provisions of GB/T17241.7; steel flange type and size should meet GB/T9113.1 provisions, the technical conditions shall comply with the provisions of GB/T9124. 

 2.2 length of the body structure are shown in Table 1. 

 The minimum wall thickness of 2.3 minimum wall thickness of the valve cast iron valve body should be in accordance with the GB/T13932-1992 table 3, the minimum wall thickness of the steel casting body should comply with the provisions of the the JB/T8937-1999 table 1. 

 3 valve tectorial piece Block 

 3.1 valve cover connection type should be used with the diaphragm seat, the diaphragm seat and valve flange type. 

 Block 3.2 diaphragm and valve body connecting bolts shall not be less than number four. 

 3.3 valve cover with a minimum wall thickness of the diaphragm seat according to the requirements of 2.3.