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American Standard Valves: Valves designed, manufactured, produced and tested according to American standards are called American Standard valves.
The main differences between American standard valves and national standard valves are:
1. The unit of nominal diameter of national standard valve is mm, and the unit of nominal diameter of American standard valve is in (inch).
2. The standard American standard of the flange is not the same as the national standard.
3. The structure length is different.
4. The inspection requirements are different. The inspection requirements of the American standard valve are higher than the national standard.
The American standard globe valve and flange globe valve are the same type of valve. The closing piece is a valve disc. The valve stem is rotated around the center line of the valve body to open and close the valve.