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...
There are many types and complex types of valves, mainly including gate valves, globe valves, throttle valves, butterfly valves, plug valves, ball valves, electric valves, diaphragm valves, check v...
In the pipeline design of industrial and civil buildings, the selection of valves is directly related to the efficiency, safety and economy of the entire fluid delivery system. Faced with the dazzl...
Wafer dual plate check valve refers to the valve that automatically opens and closes the valve flap by relying on the flow of the medium itself to prevent the backflow of the medium, also known as ...
I. Principles for Selecting Butterfly Valves
1. Structure type selection
Center butterfly valve (center line type): The valve stem and butterfly disc are centrally symmetrical, with simple structur...
The butterfly valve was invented in the United States in the 1930s. It was introduced to Japan in the 1950s and was not widely used in Japan until the 1960s. It was not popularized in my country un...
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