What is the advantage between the centric type and double eccentric type butterfly valve in big size?
Both centric and double eccentric type butterfly valves have their own advantages, but in the case of big sizes, the double eccentric type has some notable advantages over the centric type.
Firstly, double eccentric valves feature a disc that is angled in relation to the shaft and is designed to provide a more robust sealing mechanism. The disc is designed to make a complete tight seal with the seat, which makes them ideal for high pressures and low-pressure drops. This feature is particularly advantageous in big-sized butterfly valves where the pressure is high.
Secondly, the double eccentric type can handle a wide variety of fluids including highly abrasive and corrosive media that are usually impractical for centric type valves. This makes double eccentric type butterfly valves more versatile in big-sized applications where handling various fluids is necessary.
Thirdly, the double eccentric type has a significantly reduced torque requirement compared to the centric type. This helps to minimize wear and tear on the valve and its components, resulting in reduced maintenance and longer lifetimes.
Overall, the double eccentric type butterfly valve is well-suited for handling high-pressure, potentially corrosive fluids in big-sized applications. While the centric type also has its own advantages, in big sizes, the double eccentric type offers superior performance capabilities.
