What are the check valve standards?
Check valves have a wide range of uses in many areas. Because of the wide range of uses for check valves, there are many important regulatory groups that provide standards to ensure proper performance, interoperability, and user safety.
If divided by standard, check valves can be divided into National Standard (GB), American standard (ANSI), German standard (DIN); generally Chinese check valve brands are using GB is the national standard.
Then what is the difference between these three standards of check valve, this article for a detailed analysis.
1. The difference in model number
The national standard valve models are named according to the phonetic alphabet of the valve category. For example: safety valve is A, butterfly valve is D, diaphragm valve is G, check valve is H, globe valve is J, throttle valve is L, drain valve is P, ball valve is Q, trap is S, gate valve is Z, etc.. American Standard valves are generally followed by 150LB, 300 and other pressure unit values; German Standard models generally add DIN.
2. The difference in Pressure leve
There are no special specifications between American Standard valves, German Standard valves, and National Standard valves. It is only the difference between the production standard and the pressure level. The material of valve body and internal parts are cast iron, cast steel, stainless steel, etc.
Take the American Standard as an example, the American Standard pressure level from 125LB to 2500LB (or 200PSI to 6000PSI). The standard is mainly API, ANSI, which is commonly referred to as API, ANSI valves, that is, American Standard valves. German standard valve pressure is usually PN10 to PN320, using the DIN standard. If the valve is flange connection, but also use the corresponding flange standards.
The world’s major valve standards also on the American Petroleum Institute API standards, the American National Standards ANSI, German DIN, Japanese JIS, GB, the European Union standard EN, British Standard BS.
3. The difference in Flange
American standard check valve, the flange standard is ANSI 150LB, 300LB, etc.; national standard imported cast steel gate valve, the flange standard is GB, JB, HG standard.
4. The difference in length of the structure
The length of German standard check valve and national standard check valve is the same, but the American standard check valve is different, the length of American standard check valve is relatively short.
4. The difference in Inspection requirements
(American Standard, German Standard, National Standard) Valve standards and inspection requirements:
- China National Standard (GB)
- Chinese Ministry of Machinery Standard (JB)
- American National Standard (ANSI)
- American Petroleum Institute Standard (API)
- American Society for Testing and Materials (ASTM)
- American Valve and Fittings Manufacturers Standardization Society Standard (MSS)
- Japanese Industrial Standards (JIS)
- German National Standard (DIN)
- French National Standard (NF)
- British National Standard, European Standard (BS, EN)
- Other national valve standards (ГOCT, IEEE, UL)
Conclusion
To manufacture the highest quality valves, manufacturers rely on the rules set forth in these standards. Contact a reliable industrial valve supplier for a wide range of valve types to meet your business needs.
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Jack
Hi, I’m the author of this post, and I have been in this field for more than 10 years. If you want to get more info about duckbill check valves or others industrial valves, feel free to ask me any questions.
