Efficient High-Volume Flow Control: Manually Operated Butterfly Valves
Manually operated butterfly valves are the ultimate solution for throttling and isolating fluids in large-diameter piping systems. Operating on a quarter-turn design, these valves feature a central metallic disc that rotates around a spindle. A 90-degree turn of the manual lever or handwheel positions the disc parallel or perpendicular to the flow, enabling rapid shut-off and precise flow regulation.
Because of their compact, lightweight, and narrow profile, butterfly valves offer a highly economical and space-saving alternative to heavy gate or ball valves in high-volume applications.
Key Technical Specifications
- Operation Type:
- Lever Handle: Best for quick on/off operation in smaller pipe sizes (typically up to 6" or 8").
- Gearbox Handwheel: Utilises mechanical advantage for effortless, gradual control on larger valves, preventing dangerous water hammer.
- Body Style Configurations:
- Wafer Type: Sandwiched directly between two pipe flanges; the most lightweight and cost-effective design.
- Lug Type: Features threaded metal inserts that bolt directly to the flanges, allowing for downstream piping removal while the system is under pressure.
- Flow Performance: High flow coefficient (Cv) with minimal footprint, though the central disc remains in the flow path even when fully open.
