service life:
The butterfly valve can still be closed "airtight" after being used for more than 10000 times.
Pressure drop:
If the pressure drop is too large, it will increase the energy consumption. However, it should be noted that the valve is not the only factor causing pressure drop in the pipeline system, and the following factors also cause pressure drop. The fluid section of the pipe. Friction on the inner wall of the pipe.
A change in flow direction as it passes through a component. The flow characteristics of butterfly valves are three times or more than that of globe valves and 75% of those of gate valves of the same size
generality:
Butterfly valve controls and regulates the piping system by opening / closing and throttling / balancing. Butterfly valves are more versatile than gate or globe valves. Because butterfly valve can adopt various surface treatment technology and choose elastic material pipeline, so butterfly valve has strong chemical anti-corrosion performance.
Weight:
Light duty butterfly valves cost less than cast iron valves: for example, a 10 inch butterfly valve weighs 55 pounds, while a 10 inch cast iron gate valve weighs 490 pounds. For the whole pipeline system, the installation cost saved by using butterfly valve is very considerable. In addition, the heavier the piping system, the stronger the pipe support base is, which makes the whole piping system more expensive. Therefore, considering the weight of the valve, the cost of the entire piping system can be saved
Size:
The space occupied by butterfly valve is about 1 / 6 of the same size gate valve. And every cubic foot of building space is wasted. For example, a butterfly valve with a nominal diameter of 10 inches is about 21 inches high, while a gate valve with a nominal diameter of 10 inches is as high as 43 inches.
It is easy to operate
The butterfly valve only needs to turn from 1 / 90 to close. Gate and globe valves require a lot of rotation to change the valve from open to closed. Easy to open or close means that you don't need to hire highly paid operators to operate the butterfly valve.
Cost:
The cost of a butterfly valve is usually only 40% of that of cast iron gate valve, which is not only low in purchase cost but also low in installation cost.
Maintenance:
Because the butterfly valve has a high six body coefficient and a good elastic seat, the butterfly valve has the function of automatic cleaning, which reduces the possibility that the pipeline is blocked by garbage.