How should the Design Rating and Pressure Rating of valves be understood?
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Valve Globe Valve Size: 8 MM Design Rating: 400 Bar Connection: BW END 14 MM Body Material: 1.4571 AUSTENITIC SSTrim: 1.4571 AUSTENITIC SS Style: Screw in Bonnet Temperature Rating: 550 DEG Face to Face Length: 130 MM Operated: By Hand The material certificate should comply with standard 3.1 EN10204. The valve size is DN8 and the pressure rating is PN 400. It is intended for use on impulse lines for gland steam of the main turbine. How should these two ratings be understood? And what is the last sentence used for? Thank you in advance. . .
Rating generally refers to the rated value (or translated as “nominal”). Design Rating: Design rated value ； Pressure Rating: Rated pressure