1. The stomata
This is a small cavity formed by the gas that the metal solidification process does not escape inside the metal. Its inner wall is smooth and contains gas, which has a high reflectiv...
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...
Butterfly valves play a crucial role in controlling the flow of various liquids and gases. Among different types of butterfly valves, lug butterfly valves and wafer butterfly valves are two widely ...
Dual plate check valve H77X butterfly plate is two semicircles, and the spring forced reset, sealing surface can be body stacking welding wear-resistant material or lining rubber, a wide range of u...
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...
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