(American Standard, German standard, national standard) difference between valves: first of all, it can be distinguished from the standard codes of various countries: GB is the national standard, American Standard (ANSI), German standard (DIN). Secondly, it can be distinguished from the model.
The national standard valve model is named according to the Pinyin letter of valve category. For example, the safety valve is a butterfly valve D diaphragm valve g check valve h stop valve J throttle valve l drain valve P ball valve Q drain valve s gate valve Z and so on. There is no special specification between American Standard valve, German standard valve and national standard valve. It is nothing more than the difference between production standard and pressure level. The material of valve body and internal parts is easy to say. It is nothing more than cast iron, cast steel, stainless steel, etc.
Take the American Standard as an example, the American standard pressure level is from 125lb to 2500lb (or 200psi to 6000PSI), the main standard API, ANSI, commonly referred to as API, ANSI valve is the American Standard valve; the German standard valve pressure is usually PN10 to pn320, DIN standard is used; if it is a flange connected valve, the corresponding flange standard is also used. The world’s main valve standards are API standards of American Petroleum Institute, ANSI, DIN, JIS, GB, en and BS. In short, American Standard valve is the valve designed, manufactured, produced and tested according to American Standard. German standard valve is designed, manufactured, produced and tested according to German standard. The national standard valve is the valve designed, manufactured, produced and tested according to the national standard. The differences among the three are: 1. The standard of flange is different; 2. The structure length is different; 3. The inspection requirements are different.