China Fire Protection System and Backflow Preventer - China Factory, Suppliers, Manufacturers

China Fire Protection System and Backflow Preventer, , , ,. The product will supply to all over the world, such as Europe, America, Australia,, ,, .

The difference between soft sealed and hard sealed butterfly valve

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...
Applications of butterfly valves and gate valves under different working conditions

Gate valves and butterfly valves are used as switches to regulate the flow rate in pipeline use. Of course, there are still methods in the selection process of butterfly valves and gate valves. In ...
Cause analysis of common valve faults

(1) The valve does not operate. The fault phenomenon and its causes are as follows: 1. No source of gas.① The air source is not open, ② due to the water content of the air source ice in winter, res...
What is a butterfly valve?

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...