Metal hard-seated butterfly valves are a vital fluid control equipment, primarily used for pipeline system's on/off and flow control. They feature metal-to-metal sealing, offering excellent sealing performance, corrosion resistance, and a long service life. Metal hard-seated butterfly valves are widely used in the oil, chemical, metallurgy, hydropower, and other fields.

Structural Features

Metal hard-seated butterfly valves feature off-center metal sealing structure, with sealing types including metal-to-metal sealing, replaceable metal sealing ring to metal sealing, and stainless steel plate with graphite composite plate sealing ring to metal sealing. They offer various drive options, such as manual, worm gear drive, pneumatic, and electric. The butterfly plate is mounted in the diameter direction of the pipeline, rotating around the axis in the cylindrical passage of the valve body, with a rotation angle of 0° to 90°. When rotated to 90°, the valve is fully open.

Operating Principle

Metal hard-seated butterfly valves operate by rotating the valve rod to move the butterfly plate, thereby opening and closing the valve. During rotation, the butterfly plate drives the valve seat to rotate as well, creating a seal between the butterfly plate and the seat. When the butterfly plate rotates to 90°, the valve is fully open, at which point only the thickness of the butterfly plate offers resistance to the fluid flow, resulting in very low flow resistance.

Application Fields

Metal hard-seated butterfly valves are suitable for various media and operating conditions, including oil, natural gas, chemicals, power, iron and steel metallurgy, and wastewater treatment, among many others. Their features of high-temperature resistance, wear resistance, and excellent mechanical properties make them excel in high-pressure, high-temperature, and corrosive medium environments. Particularly, in situations requiring control of high-temperature, high-pressure, and corrosive media, metal hard-seated butterfly valves offer significant advantages.