Overview of Hard Seal Butterfly Valves:
A hard seal butterfly valve is designed with an eccentric metal sealing structure, where the sealing mechanism involves a metal-to-metal contact. This type of valve uses replaceable metal seals, such as stainless steel plates or graphite composite rings, to ensure a tight closure. The actuation methods for hard seal butterfly valves include manual operation, worm gear drives, pneumatic actuators, and electric motors. These valves are typically installed horizontally in pipelines to ensure proper functionality and longevity.
The disc of a hard seal butterfly valve is positioned along the diameter of the pipe. Within the cylindrical body of the valve, the disc rotates around its axis, with a rotation angle ranging from 0° to 90°. When fully open at 90°, the flow through the pipeline is unrestricted.
Key Features of Hard Seal Butterfly Valves:
Hard seal butterfly valves have become widely used across various industries, including oil and gas, chemical processing, metallurgy, and hydropower. They are commonly used for on/off control and flow regulation in pipeline systems. Traditional butterfly valves often use rubber or PTFE (polytetrafluoroethylene) as sealing materials, which may not be suitable for high-temperature, high-pressure, or corrosive environments.
To address these limitations, advanced designs like the triple-eccentric metal-sealed butterfly valve have been developed. In this design, the valve body and seat are connected components, with the seat’s sealing surface welded with heat-resistant and corrosion-resistant alloys. A multi-layer soft-seal ring is mounted on the disc. Compared to conventional models, this type offers better high-temperature resistance, smoother operation, reduced friction during opening and closing, and improved sealing performance due to torque compensation when the valve is closed. As a result, it provides longer service life and enhanced reliability.
Yayi Valve Co., Ltd. specializes in manufacturing a wide range of butterfly valves, including hard-seal, soft-seal, high-temperature stainless steel, ventilation, wear-resistant dust, and insulated butterfly valves. We welcome inquiries from customers looking for high-quality and durable solutions for their industrial needs. Whether you need valves for harsh environments or precision applications, we are here to provide reliable and efficient products tailored to your requirements. Contact us today to learn more about our comprehensive valve solutions.
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