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ANSI gate valve dimensions correspond to the national standard specifications
The dimension specifications of ANSI gate valves according to the Chinese national standard:
**Representation of diameter:**
- ANSI diameter: Usually expressed in inches („), such as 2„, 4„, etc.
- Chinese national standard diameter: Usually expressed in DN (nominal diameter), such as DN50, DN100, etc. The number following DN represents the diameter of the valve opening in millimeters.
**Correspondence table:**
- 1 inch (1„): Corresponds to Chinese national standard DN25, i.e., a diameter of 25 millimeters.
- 2 inches (2„): Corresponds to Chinese national standard DN50, i.e., a diameter of 50 millimeters.
- 4 inches (4„): Corresponds to Chinese national standard DN100, i.e., a diameter of 100 millimeters.
And so on. There is a certain correspondence between ANSI diameters and Chinese national standard DN values, but not all dimensions correspond exactly one-to-one. For specific details, refer to the relevant standards or manuals.
When selecting a valve, in addition to considering the diameter, factors such as the type of valve, material, working pressure, and temperature range should also be taken into account. There may be differences between ANSI and Chinese national standards in terms of valve structure, dimensions, and connection methods. Therefore, in practical applications, the appropriate choice should be made based on the specific circumstances.
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