China Suppliers Factory Lug Butterfly Valve DN50-DN600 with Ductile Iron & EPDM Rubber for Corrosion Resistance
Product Specification
| Product Name | Butterfly Valve | Body/Disc Material | Ductile Iron |
| Type | Lug | Shaft | SS304/SS316 |
| Size | DN50-DN600 | Seal | EPDM |
| Operation | Handle/Worm gear/Electric/Hydraulic/Peneumatic | Standard | DIN/ANSI/GOST/JIS/BS |
Product Description
Butterfly valves stand as pivotal fluid control devices in modern industrial systems, defined by a streamlined structure that balances functionality and simplicity. Their core framework comprises a valve casing, rotating vane, central shaft, and actuation mechanism—components engineered to work in tandem for smooth flow regulation. The casing, typically a one-piece or split-body design, houses the vane, which rotates 90 degrees to open or close the passage, while the shaft transmits torque from the actuator to the vane.
Material selection for butterfly valves is tailored to media characteristics and operating conditions. Common options include corrosion-resistant alloys for harsh chemicals, engineering plastics for low-pressure water systems, and carbon steel for general industrial use. High-performance models may adopt titanium or Hastelloy for extreme temperatures or abrasive media, ensuring structural integrity over prolonged use.
Sealing technology is a critical feature, with two primary configurations: elastic sealing elements and metallic sealing surfaces. Elastic seals, often made of EPDM or PTFE, deliver tight closure for low-pressure applications, while metallic seals—such as stainless steel or Inconel—withstand high temperatures and pressure, preventing leakage via precise contact between the vane and valve seat.
These valves find widespread use across sectors: municipal water treatment relies on their cost-effectiveness, petrochemical plants utilize them for medium-pressure fluid handling, and HVAC systems benefit from their compact size. They also serve in food and beverage production, where hygiene-grade materials ensure compliance with safety standards.
Operation methods vary from manual control via handwheels for small-scale setups to pneumatic or electrically powered drives for large industrial systems. Automated actuation enables remote monitoring and precise flow adjustment, reducing human intervention and enhancing operational efficiency—key for processes requiring consistent performance.
Frequently Asked Questions
What are the core components of a butterfly valve?
A butterfly valve's core framework consists of a valve casing (one-piece or split-body design), a rotating vane, a central shaft, and an actuation mechanism. These components work in tandem to regulate fluid flow smoothly.
What materials are available for butterfly valve construction?
Depending on the application, butterfly valves are constructed from ductile iron, SS304/SS316 (for shafts), corrosion-resistant alloys, engineering plastics, carbon steel, and high-performance options like titanium or Hastelloy for extreme environments.
What are the differences between elastic and metallic sealing technologies?
Elastic seals, made of EPDM or PTFE, provide tight closures suitable for low-pressure systems. Metallic seals, made from stainless steel or Inconel, are designed to withstand high temperatures and pressures by ensuring precise contact between the vane and valve seat.
Which industries commonly utilize butterfly valves?
Butterfly valves are widely used in municipal water treatment, petrochemical plants, HVAC systems, and food and beverage production where compliance with safety and hygiene standards is required.
What operational methods can be used with these valves?
Operation methods range from manual control using handles or worm gears to automated actuation systems powered by electric, hydraulic, or pneumatic drives for remote monitoring and precise flow adjustment.
What international standards do these butterfly valves meet?
These butterfly valves conform to major global standards including DIN, ANSI, GOST, JIS, and BS to ensure compatibility with diverse piping networks.