1. Before installation, it is necessary to carefully check whether the logo and certificate of the butterfly valve meet the requirements of use, and should be cleaned after verification.
2. The but...
Whether the selection of the connection method between the butterfly valve and the pipeline or equipment is correct or not will directly affect the probability of running, dripping, dripping and le...
In the 30s, the butterfly valve was invented in United States, introduced to the Japan in the 50s, and was widely used in Japan in the 60s, and it was promoted in China after the 70s. At present, b...
Hard sealed butterfly valve:
Butterfly valve hard seal refers to: the two sides of the sealing pair are metal materials or hard other materials. This seal has poor sealing properties, but it has hi...
Sand casting: Sand casting commonly used in the valve industry can also be divided into various types of sand such as wet sand, dry sand, water glass sand and furan resin no-bake sand according to ...
1. Valve selection principle:
The selected valve should meet the following basic principles.
(1) Safety and reliability of petrochemical, power station, metallurgy and other industries require cont...
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