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China Flanged Butterfly Valve Suppliers - Stainless Steel & PTFE Rubber, DN50-DN2400, Factory Direct High Quality
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
What are the main components of a butterfly valve?
A butterfly valve consists of four primary components: a valve housing, a pivotal disc, a drive spindle, and a sealing system. These parts work together to regulate fluid flow with minimal energy loss.
What materials are butterfly valves made of?
Material selection depends on the fluid and working conditions. Options include anti-corrosive metals like stainless steel for chemical applications, technical polymers for low-pressure water systems, and carbon steel for general industrial use. Titanium or duplex steel are used for extreme high-temperature or abrasive environments.
How do flexible seals and metal seals differ in performance?
Flexible seals (made of NBR or PTFE) provide tight closure in low-pressure systems. Metal seals (typically stainless steel or alloy-based) are designed to withstand high pressures and extreme temperatures, ensuring leak-proof contact between the disc and the valve seat.
Which industries commonly utilize butterfly valves?
They are widely used in urban water management, oil and gas refineries, HVAC systems, food processing (utilizing food-grade materials), and chemical handling.
What operation methods are available for these valves?
Operation methods range from manual control using handles or worm gears for smaller systems, to automated actuators (electric, hydraulic, or pneumatic) for larger industrial setups requiring remote monitoring and precise flow adjustment.
What standard specifications do these butterfly valves follow?
These butterfly valves conform to major international standards, including DIN, ANSI, GOST, JIS, and BS, ensuring compatibility with global piping systems.