DN Industrial Valves door: it means the nominal diameter of the valve, is the size of the valve diameter; The door of the PN said nominal pressure of the valve, is the pressure range of the valve.

PN full name ( 压力名义) : on behalf of the nominal pressure, the unit is MPa MPa, and pipeline system components related reference value compression capacity, for ease of use, take priority of R10 series. Nominal pressure refers to the pipe work at 20 ℃ water pressure. If the water temperature at 25 ℃ Should according to the different between 45 ℃ temperature drop coefficient, fixed working pressure. For example J41H - 16 c nominal pressure is 16 KGF/cm2, a value of 16 kg per square centimeter pressure is PN1 if to mpa. 6MPa。

DN: on behalf of the pipeline internal diameter of the unit is mm mm, nominal diameter is also called nominal diameter. Neither diameter nor inner diameter, are in order to achieve the standardization of regulations, enables the same diameter of pipe and fittings are to realize the mutual connection, the law on the interoperability and interchangeability. (for example is 50 mm, somewhat valve is in inches for the unit to represent the pipeline internal diameter size, 1 inch = 2. 54 cm.

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Many of the water gate valve listed here can be purchased for less money, but in general we recommend paying a slightly higher price for significantly improved performance. These are our top choices and their recommended configurations.