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0102030405

Stainless Steel Flanged Butterfly Valve Suppliers & Factory in China - DN50 to DN2400 with PTFE Seat

Introducing our premium flanged butterfly valve, expertly crafted in China with a durable stainless steel body, ensuring exceptional anti-corrosion properties and structural stability for demanding industrial environments. Designed by leading suppliers, this valve features a PTFE seat that guarantees bubble-tight sealing in accordance with ANSI B16.104 Class VI standards, offering remarkable chemical inertness and temperature resistance from -20℃ to 180℃. Its compact midline design minimizes flow resistance and simplifies maintenance. Perfect for food-grade processing, chemical fluid transfer, and precision flow control systems, our butterfly valve is manufactured in our state-of-the-art factory to meet global industry standards. Choose our reliable solution for your industrial needs today!

Product Details

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

Q1: What are the main components of a butterfly valve?

A butterfly valve consists of four core components: a valve housing (body), a rotating disc, a drive spindle (shaft), and a sealing system. These parts work together to control or isolate the fluid flow.

Q2: How do I choose the right material for a butterfly valve?

Material selection depends on the fluid and operational conditions. Stainless steel is ideal for corrosive chemical media, technical polymers work well for low-pressure water systems, carbon steel is suitable for general industrial uses, and titanium or duplex steel is preferred for extreme high-temperature or abrasive environments.

Q3: What is the difference between flexible seals and metal seals?

Flexible seals (made of materials like NBR or PTFE) provide bubble-tight shutoff in lower-pressure systems. Metal-to-metal seals are designed to withstand high-pressure and high-temperature conditions while maintaining leak-proof performance.

Q4: What industries commonly use butterfly valves?

They are widely used in urban water management, oil and gas refineries, building HVAC systems, chemical processing, and food processing industries where hygienic standards must be met.

Q5: What operation options are available for butterfly valves?

Depending on the system scale, they can be operated manually (via handles or worm gears) or automatically using electric, hydraulic, or pneumatic actuators for remote monitoring and precise flow adjustment.