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Lug Butterfly Valve DN50-DN600 - China Suppliers & Factory, Ductile Iron & EPDM Rubber for HVAC and Water Systems
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
Q: What is the primary function of a butterfly valve?
A butterfly valve is a fluid control device used to regulate or isolate the flow of a medium. It features a rotating disc (vane) that turns 90 degrees inside the valve body to fully open or close the flow passage.
Q: What materials are available for the body and seal of the butterfly valve?
The standard configuration features a Ductile Iron body and disc with an EPDM seal. However, material selections can be customized with various alloys, stainless steels (like SS304/SS316 for the shaft), or engineering plastics based on the operating conditions.
Q: What is the difference between elastic and metallic seals?
Elastic seals (such as EPDM or PTFE) provide a tight, leak-free closure ideal for low-pressure and low-temperature applications. Metallic seals (like stainless steel or Inconel) are engineered to withstand extreme temperatures and high-pressure environments.
Q: How can these butterfly valves be operated?
They support multiple operation methods, including manual control (via handle or worm gear) and automated systems (using electric, hydraulic, or pneumatic actuators) for remote monitoring and precise flow adjustment.
Q: Which international standards do your butterfly valves comply with?
Our butterfly valves are manufactured to meet major global standards, including DIN, ANSI, GOST, JIS, and BS, ensuring compatibility with diverse piping systems worldwide.