why is the butterfly valve is used in cooling tower system and exchagner
where are the butterfly valve used? in petrochemical companies in cooling towers and exchangers and surface condersers the butterfly valve are used. i want to know why we dont use gate valves or other valves.are there principles for that.
Butterfly valves offer a greater level of flow control than gate valves. Such control is needed to regulate flows in cooling systems for maximum comfort and energy savings. Also, when a butterfly valve is partially opened, there is less surface area perpendicular to the flow. This decreases head (pressure) loss and minimizes turbulence.
This is especially critical for petrochemical companies working with unstable liquids.
The most common reason for using butterfly valves is their lower cost. They typically are cheaper than gate valves; however the choice of which butterfly valve you use is important since many are designed to fit between two flanges and if you wish to remove the exchanger with the butterfly valve in the closed position to contain the cooling water, it won’t work.
It is true that butterfly valves can be used to attempt to control cooling water flow but they are not really very good for this application since their percent of opening is not proportional to flow rate as a globe valve would be.
