The factors that should be considered in selecting butterfly valve
service life
Butterfly valve in the use of more than 10,000 times, still can ensure airtight when closed.
pressure drop
If the pressure drop is too large, will increase energy consumption. However, you should know that the valve is not the only factor to produce pressure drop in pipe system, leading to pressure drop production also have the following factors. Fluid pipe cross-section. Pipe wall friction. When the flow direction changes through the components, the fluid characteristics of butterfly valve is equivalent to three times or more, equivalent to 75% of the same size gate valve.
Versatility:
Butterfly valve through the on/off and throttling/balancing to control and regulate the pipeline system. Compared with gate valve or globe valve, butterfly valve has a better "universal nature." As the butterfly valve can be used in a variety of surface treatment technology and choice of elastic material pipeline, so butterfly valve has a very strong chemical corrosion resistance performance.
weight
The light butterfly valve installing costs save more compared with heavy cast iron valve: for example, a butterfly valve of nominal diameter 10-inch weight is 55 pounds, while a 10-inch cast iron gate valve weight is as high as 490 pounds. For the entire pipeline system, the adoption of butterfly valves can save significant installing costs. In addition, the heavier the pipeline system is, it requires the pipe support base should be strong, leading to the entire pipeline system more expensive. Therefore, taking the weight of the valve into account, we can save the cost of the entire pipeline system.
sizes
the amount of butterfly valve space is about 1/6 of the same sizes of gate valve. And adding each cubic feet building space, it means that the cost wasted. For example: DN 10-inch butterfly valve is about 21 inches high, while the gate valve of DN 10 inches is as high as 43 inches.
Easy to operate:
from opening to closing, butterfly valve only need to rotate 1/4 turn (90 degrees). While gate valve and globe valve need to rotate many times in order to be turned the valve from opening state to off state. To open or close easily means that it is unnecessary to hire operators with high wages to operate the butterfly valve.
cost
The cost of a butterfly valve is usually only 40% of cast iron gate valve, not only purchase cost is low, but also the installation costs are relatively low.
Maintenance:
As the butterfly valve has high six hexasomic coefficient and good flexibility of the valve seat, so the valve has a self-cleaning function, reducing the possibility of the pipeline blocked by junk.
