Manual Double Flanged Butterfly Valve – A Complete Beginner’s Guide

 

manual-double-flanged-butterfly-valve

A manual double flanged butterfly valve is a widely used valve in water supply, wastewater, and industrial pipelines. It is designed to control or isolate the flow of liquid using a simple, compact mechanism. The term “manual” means the valve is operated by hand, typically using a handwheel or lever, while double flanged indicates flanges on both ends, providing secure installation between two pipe sections.

How It Works

The valve has a disc inside that rotates 90 degrees:

  • Open position: The disc aligns with the pipe, allowing full flow.

  • Closed position: The disc blocks the flow completely.

This design ensures quick operation, smooth flow control, and minimal pressure drop.

Key Advantages

  • Durable & Reliable: Strong construction for long service life.

  • Easy to Install: Flanged ends make mounting and replacement simple.

  • Low Maintenance: Fewer moving parts reduce wear and tear.

  • Versatile: Suitable for on/off and throttling applications.

  • Compact Design: Takes less space compared to gate or globe valves.

Applications

  • Municipal water distribution

  • Wastewater treatment plants

  • Industrial pipelines

  • Irrigation systems

  • Fire protection systems

Manual double flanged butterfly valves are ideal for projects requiring efficient, cost-effective, and reliable flow control.

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