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China Flanged Butterfly Valve Suppliers - Durable Stainless Steel & EPDM Rubber Factory - DN50-DN2400
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.
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?
A butterfly valve consists of a valve body, a rotating closure disc, a transmission shaft, and a sealing assembly. These components work together to provide efficient flow control and rapid on-off switching.
What materials are used for the body and sealing of these valves?
The valve body and disc are typically constructed from Ductile Iron, the shaft is made from durable SS304 or SS316, and the seal uses EPDM. Depending on application requirements, options like PTFE-lined bodies, brass alloys, or high-strength alloy steels are also available.
How do soft-seal and hard-seal configurations differ?
Soft-seal designs utilize elastic polymers to ensure tight, leak-free closure at lower pressures. Hard-seal designs employ metal-to-metal contact, allowing the valve to withstand high-temperature steam and highly abrasive fluids.
What operational modes are supported?
These valves support manual operations via handles and worm gears, as well as automated operations using electric, hydraulic, or pneumatic actuators for integration with central control systems.
Which international standards do your butterfly valves comply with?
Our butterfly valves are manufactured to comply with major global design standards, including DIN, ANSI, GOST, JIS, and BS.