蝶閥體積小、重置輕、口徑越大相對其他閥更經濟實惠。蝶閥處于完全開啟位置時，蝶板厚 度是介質流經閥體的唯一的阻力，因此通過該閥門所產生的壓力降很小，當開啟度在大約15度至 7。度之間時，又能進行靈敏的流■控制，因此大口徑的流貝調節，蝶閥具有較大的物。 Butterfly valve is small in size, light in weight, and has bigger diameter, and is more economical and practical than other valves. When butterfly valve is in the fully open position, the thickness of butterfly plate is the only resistance of the medium flowing through the body. So the pressure dropped by the valve is small. When It is open in about 15 degrees to 70 degrees, it can perform a sensitive flow control. For the flow control of large caliber, butterfly valve has great advantage.