What Are The Differences Between American Standard Valves And National Standard Valves

The main differences between American standard valves and national standard valves are:

1. The unit of the nominal diameter of the national standard valve is mm, and the unit of the nominal diameter of the American standard valve is in (inch).

2. The standard American standard and national standard of flanges are also different.

3. The structural length is different.

4. The inspection requirements are different. The inspection requirements of American standard valves are higher than those of national standards.

Valves are control components in fluid conveying systems, with functions such as shutoff, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief.

Valves used in fluid control systems, from simple shut-off valves to various valves used in extremely complex automatic control systems, have a wide variety of varieties and specifications. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media.

Valves are also divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.), chrome-molybdenum steel valves, chrome-molybdenum-vanadium steel valves, duplex steel valves, plastic valves, non-standard custom valve materials, etc. according to the material.

2PC Flanged Ball Valve Currently, API and ASME standards are more popular.

American standard valves: Valves designed, manufactured, produced and tested according to American standards are called American standard valves.