Manual Butterfly Damper for Sale

A manual butterfly damper is operated by hand to open and close. It has a simple structure and is flexible, making it popular in industries like chemicals, petroleum, food, and pharmaceuticals. Here are its main features:

1. Compact and Lightweight
   • The valve consists of a valve body, valve stem, and butterfly plate. It is small and lightweight, weighing half as much as a gate valve, which saves 40% in installation space and is ideal for tight areas (like ship pipelines).
2. Quick and Easy Operation
   • It opens or closes with a 90° turn and requires little effort, making it great for frequent adjustments. The worm gear mechanism increases torque, allowing easy operation of large valves.
3. Low Fluid Resistance and Accurate Flow Control
   • When fully open, the butterfly plate presents minimal resistance, allowing for efficient flow control, such as in city water supply lines. Some models can achieve a flow control accuracy of ±2%.
4. Reliable Sealing
   • Soft Sealing: Uses materials like nitrile rubber and PTFE for low-temperature corrosive media, with a leakage rate of ≤0.01 ml/min.
   • Hard Sealing: Features welded stainless steel or ceramic coatings, handling high temperatures (up to 600°C) and pressures (Class 1500), suitable for steam and flue gas.
5. Flexible Installation
   • Can be installed in any orientation, reducing costs. Some models use dual sealing rings for bidirectional zero leakage.