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China Lug Butterfly Valve Suppliers - Ductile Iron & PTFE Rubber, DN50-DN600 Factory Direct
Product Specification
| Product Name | Butterfly Valve | Body/Disc Material | Ductile Iron |
| Type | Lug | Shaft | SS304/SS316 |
| Size | DN50-DN600 | Seal | PTFE |
| Operation | Handle/Worm gear/Electric/Hydraulic/Peneumatic | Standard | DIN/ANSI/GOST/JIS/BS |
Product Description
Butterfly valves emerge as indispensable tools for fluid regulation, distinguished by a robust yet minimalist design that adapts to diverse operational demands. Their core components include a valve body, closure element (rotating vane), drive shaft, and sealing assembly—each optimized to deliver reliable flow control with minimal pressure drop. The valve body, often cast or forged, provides structural support, while the vane rotates around the shaft to modulate flow, offering quick on-off or throttling capabilities.
Material choices are guided by the fluid being handled: PTFE-lined bodies excel with corrosive media, brass alloys suit potable water systems, and high-strength steels cater to high-pressure industrial applications. Advanced models may integrate composite materials or titanium alloys to balance durability and weight, ideal for offshore or aerospace fluid systems.
Sealing performance is achieved through two main approaches: soft-seal and hard-seal designs. Soft-seal configurations use elastic polymers to create a tight seal at low pressures, while hard-seal options employ metal-to-metal contact, suitable for high-temperature steam or abrasive fluids. Both designs prioritize leak prevention, ensuring system efficiency and safety.
Butterfly valves are applied across a broad spectrum of industries: marine engineering uses them for ballast water systems, pharmaceutical plants deploy hygiene-grade variants for process fluids, and power generation facilities rely on them for cooling water regulation. Their versatility also extends to wastewater treatment and chemical processing, where adaptability to varying media and pressures is essential.
Operational modes range from manual operation with lever handles for small valves to automated systems powered by pneumatic cylinders or electric motors. These automated solutions enable integration with control systems, allowing for precise flow tuning and remote operation—critical for large-scale facilities seeking to optimize process control and reduce downtime.
Frequently Asked Questions
What are the main components of a butterfly valve?
The core components include a valve body (cast or forged), a closure element (rotating vane), a drive shaft, and a sealing assembly, designed together to deliver reliable flow control with minimal pressure drop.
What body and disc materials are available for butterfly valves?
Common materials include Ductile Iron, PTFE-lined bodies for corrosive media, brass alloys for potable water, high-strength steels for high pressure, and composite or titanium alloys for offshore and aerospace applications.
What is the difference between soft-seal and hard-seal designs?
Soft-seal configurations utilize elastic polymers for tight sealing at low pressures, while hard-seal designs rely on metal-to-metal contact suitable for high-temperature steam or abrasive fluids.
Which industries rely on butterfly valves for fluid regulation?
They are widely applied across marine engineering, pharmaceutical manufacturing, power generation plants, wastewater treatment facilities, and chemical processing industries.
What operation modes and standard sizes are available?
Valves range from DN50 to DN600 and support manual handle, worm gear, electric, hydraulic, and pneumatic actuation under DIN, ANSI, GOST, JIS, and BS standards.