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The nominal pressure of the valve

GB/T 1048-2005 standard stipulates that the nominal pressure of the valve is also an indicator, represented by the combination of the symbol "PN" and the number, the nominal pressure can not be used for calculation purposes, does not represent the actual measurement value of the valve, the establishment of the nominal pressure is Simplify the number of specifications for valve pressure. When selecting, the design unit, manufacturing unit, and user unit follow the principle of relying on the closest data to this rule. The establishment of nominal dimensions is also the same purpose. Nominal pressure is divided into European and American systems. China's nominal pressure is to use European system standards. Specifications are as follows:

PN 2.5 PN6 PN10 PN16 PN25 PN40 PN63/64 PN100/110 PN150/160 PN260 PN320 PN420

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