China Suppliers Factory Lug Butterfly Valve DN50-DN600 - Epoxy-Coated 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
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
It is widely implemented across municipal water treatment, petrochemical plants for medium-pressure fluids, HVAC systems, and hygienic food and beverage production processes.
The standard body and disc are crafted from ductile iron, paired with high-strength SS304 or SS316 shafts. Depending on media corrosiveness and temperature, high-performance alloys like titanium or Hastelloy can also be selected.
The valve features elastic sealing elements such as EPDM or PTFE for reliable tight shut-off in lower-pressure settings, alongside metallic sealing options (e.g., stainless steel, Inconel) capable of handling elevated pressures and temperatures.
Control options range from manual handles and worm gears to automated pneumatic, electric, or hydraulic drives that facilitate remote monitoring and automated flow control.
The valve is manufactured in nominal diameters ranging from DN50 up to DN600 and conforms to international standards including DIN, ANSI, GOST, JIS, and BS.
The vane turns 90 degrees inside the casing via torque transmitted directly through the central shaft, delivering rapid shut-off and smooth throttling with minimal mechanical wear.