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China Flanged Butterfly Valve Factory - Stainless Steel & EPDM Rubber, Durable, Low Pressure Drop, Suppliers for Fluid Control
Product Specification
| Product Name | Butterfly Valve | Body/Disc Material | Ductile Iron |
| Type | Flanged | Shaft | SS304/SS316 |
| Size | DN50-DN2400 | Seal | EPDM |
| Operation | Handle / Worm gear / Electric / Hydraulic / Peneumatic | Standard | DIN/ANSI/GOST/JIS/BS |
Product Description
Butterfly valves stand out as versatile fluid control solutions, characterized by a robust yet streamlined design that adapts to a wide range of operational demands. Their fundamental structure includes a valve body, rotating closure disc, transmission shaft, and sealing assembly—each component optimized to balance flow control efficiency and structural simplicity. The valve body, often forged or cast, provides structural support, while the closure disc rotates around the shaft to modulate flow, offering rapid on-off switching or throttling capabilities.
Material choices are guided by the nature of the fluid being conveyed: PTFE-lined bodies excel in handling corrosive substances, brass alloys are suitable for potable water systems, and high-strength alloy steels cater to high-pressure industrial environments. Advanced models may integrate composite materials or superalloys to reconcile durability and lightweight properties, making them ideal for offshore or aerospace fluid control systems.
Sealing reliability is achieved through two main configurations: soft-seal and hard-seal designs. Soft-seal solutions use elastic polymers to ensure tight closure at low pressures, while hard-seal options employ metal-to-metal contact, designed to withstand high-temperature steam or abrasive fluids. Both designs prioritize leak prevention, safeguarding system efficiency and operational safety.
Butterfly valves find application across numerous sectors: marine engineering employs them for ballast water regulation, pharmaceutical facilities use hygiene-grade variants for process fluids, and power plants rely on them for cooling water management. Their adaptability also extends to wastewater treatment and chemical processing, where resistance to varying media and pressure conditions is crucial.
Operational modes range from manual control with lever handles for small valves to automated systems powered by pneumatic cylinders or electric motors. These automated setups enable integration with central control systems, facilitating precise flow tuning and remote operation—key for large-scale facilities aiming to optimize process control and minimize downtime.
Frequently Asked Questions
Q: What are the key components of a butterfly valve?
A butterfly valve consists of a valve body, a rotating closure disc, a transmission shaft, and a sealing assembly. These components work together to balance flow control efficiency and structural simplicity.
Q: How do I choose between soft-seal and hard-seal butterfly valves?
Soft-seal designs use elastic polymers to ensure tight closure at low pressures. Hard-seal options employ metal-to-metal contact to withstand high-temperature steam or abrasive fluids.
Q: What materials are typically used for butterfly valve bodies and discs?
Common materials include Ductile Iron, PTFE-lined bodies for corrosive substances, brass alloys for potable water, and high-strength alloy steels for high-pressure industrial environments.
Q: What industries commonly use butterfly valves?
They are widely used in marine engineering (ballast water), pharmaceutical facilities (hygiene-grade), power plants (cooling water), wastewater treatment, and chemical processing.
Q: What options are available for operating a butterfly valve?
Operation modes range from manual control (lever handles or worm gears) to automated configurations powered by pneumatic cylinders, hydraulic systems, or electric motors for remote integration.