China Flanged Butterfly Valve Suppliers - Durable Stainless Steel & EPDM Rubber, DN50-DN2400, Factory Direct Quality
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 / Pneumatic | 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.
Key Application Note: 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
What are the main components of a butterfly valve?
The fundamental structure of a butterfly valve includes a valve body, a rotating closure disc, a transmission shaft, and a sealing assembly. Each component is optimized to balance flow control efficiency and structural simplicity.
How do I choose the right body and disc material for my application?
Material selection is determined by the fluid being conveyed. For instance, Ductile Iron is standard, PTFE-lined bodies excel with corrosive substances, brass alloys are suitable for potable water, and high-strength alloy steels are used for high-pressure industrial environments.
What is the difference between soft-seal and hard-seal butterfly valves?
Soft-seal designs utilize elastic polymers (like EPDM) to ensure a tight closure at lower pressures. Hard-seal designs employ metal-to-metal contact to withstand high-temperature steam or highly abrasive fluids.
What operational modes are available for these valves?
Butterfly valves can be operated manually using lever handles or worm gears. For automated and remote operations, they can be integrated with pneumatic cylinders, hydraulic actuators, or electric motors.
What standards and sizes do these butterfly valves support?
These flanged butterfly valves are available in sizes ranging from DN50 to DN2400 and conform to major international standards including DIN, ANSI, GOST, JIS, and BS.