Flanged Butterfly Valve DN50-DN2400 - Stainless Steel & PTFE Rubber from China Suppliers and Factory
Product Specification
| Product Name | Butterfly Valve | Body/Disc Material | Stainless steel |
| Type | Flanged | Shaft | SS304/SS316 |
| Size | DN50-DN2400 | Seal | PTFE |
| Operation | Handle/Worm gear/Electric/Hydraulic/Peneumatic | Standard | DIN/ANSI/GOST/JIS/BS |
Product Description
Butterfly valves rank among the most widely used fluid control devices, defined by a compact and functional design that delivers reliable performance across sectors. Their core structure consists of a valve housing, pivotal disc, drive spindle, and sealing system—components synergized to regulate flow with minimal energy loss. The housing, often cast from durable materials, encases the disc, which rotates 90 degrees around the spindle to either permit or block fluid passage, while the spindle transfers force from the operating mechanism to the disc.
Material selection is tailored to the fluid medium and working conditions. Anti-corrosive metals like stainless steel are ideal for chemical handling, technical polymers suit low-pressure water systems, and carbon steel serves general industrial needs. For extreme environments involving high temperatures or abrasive media, premium materials such as titanium or duplex steel are adopted to ensure long-term structural stability.
Sealing performance relies on two primary designs: flexible seal components and metal seal interfaces. Flexible seals, crafted from materials like NBR or PTFE, ensure tight closure in low-pressure scenarios, while metal seals—typically stainless steel or alloy-based—withstand high pressures and temperatures, achieving leak-proof performance through precise contact between the disc and valve seat.
These valves are extensively applied in diverse industries: urban water management leverages their cost-efficiency, oil and gas refineries use them for medium-pressure fluid transfer, and building HVAC systems benefit from their space-saving design. They also play a vital role in food processing, where food-grade materials meet strict hygiene requirements.
Operation methods vary by scale: small-scale systems utilize manual operation with crank handles, while large industrial setups adopt air-driven or motorized actuators. Automated operation enables remote monitoring and precise flow adjustment, reducing manual intervention and boosting process stability—essential for applications demanding consistent performance.
Frequently Asked Questions
The butterfly valve is available in nominal sizes from DN50 to DN2400 and complies with major international manufacturing standards including DIN, ANSI, GOST, JIS, and BS.
The standard body and disc are constructed from durable stainless steel with shafts in SS304 or SS316. In addition, premium materials such as carbon steel, titanium, or duplex steel are selected depending on operating environments.
Two primary sealing types are provided: flexible seals (such as PTFE or NBR) for tight shut-off in lower-pressure settings, and metal seal interfaces (stainless steel/alloy) engineered for high-temperature and high-pressure duties.
The valve supports multiple drive options ranging from manual levers and worm gear operators to automated electric, hydraulic, and pneumatic actuators for remote flow control.
They are widely applied across municipal water management, oil and gas refining, HVAC installations, chemical processing, and food processing lines requiring hygienic compliance.
The drive spindle delivers force from the actuator or handle directly to the disc, rotating it 90 degrees inside the casing to either permit unobstructed flow or achieve complete bidirectional shutoff.