The function of double flanged butterfly valve

Q: What is the main function of a double flanged butterfly valve in pipeline systems?

A: The double flanged butterfly valve is a quarter-turn valve mainly used for fluid isolation and flow regulation. It relies on the rotation of the disc to cut off or throttle the medium flow. With full flange connections at both ends, it can be firmly installed as an independent pipeline section to realize rapid on-off control of the pipeline.

Conclusion: Therefore, the main function of the double flanged butterfly valve is to achieve reliable fluid shutoff and flow adjustment, serving as an economical pipeline control component for general industrial piping systems.

The principle of using double flanged butterfly valve

Q: What is the working principle of a Double Flanged Butterfly Valve?

A: Its operation depends on the 90-degree rotation of the valve disc. When the disc rotates parallel to the medium flow, the valve opens for fluid passage; when rotated perpendicular to the flow, the disc presses tightly against the rubber seat to form sealing and block the medium. The full flanged ends are bolted to pipeline flanges to maintain stable installation during opening and closing cycles.

Conclusion: Therefore, the operating principle of the double flanged butterfly valve relies on the rotary disc and resilient seat to complete fluid cut-off and regulation, with dual flange structure ensuring stable and rigid pipeline connection.

The operating conditions and advantages of double flanged butterfly valve

Q: What are the common applications and key advantages of double flanged butterfly valves?

A: This valve is widely used in HVAC, cooling water, water supply, fire protection and general industrial low-pressure piping systems. It is suitable for clean water and non-corrosive liquid media under low to medium pressure. Its key advantages include:

Stable Flange Connection: Double full flanged ends provide rigid installation, good structural stability under pipeline load.

Bidirectional Sealing: Resilient soft seat achieves bubble-tight bidirectional shutoff.

Light & Compact: Short face-to-face length saves installation space and reduces overall pipeline weight. Low Operating Torque: Easy to actuate manually, electrically or pneumatically. Cost-Effective: Economical solution for large-diameter water service compared with gate or ball valves.

Conclusion: Therefore, the double flanged butterfly valve provides an economical and reliable fluid control solution for low-pressure pipeline systems. With advantages such as stable full-flange installation, simple operation and compact structure, it is a widely adopted isolation and throttling valve for water and general industrial service.

As a leading industrial valve manufacturer, SJ is proud to offer its high-performance double flanged butterfly valve solutions, specifically engineered for isolation and flow regulation in water, HVAC, fire protection and general industrial applications. Our double flanged butterfly valve features a robust full-flange integral design at both valve ends, which can be directly bolted with pipeline flanges to form stable and rigid installation. This resilient seated butterfly valve ensures reliable bidirectional shutoff and convenient flow throttling, allowing operators to quickly open or close pipelines for routine operation and maintenance. With flexible material options for valve body, disc and seat, and adherence to strict international standards, SJ delivers the safety, efficiency, and durability your process lines demand.

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