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Cast Iron Butterfly Valve 200mm
Cast Iron Butterfly Valve 200mm Details
| Size | 200 mm (8 inch) |
| Operation Type | Lever Operated |
| Pressure Rating | PN 16 |
| Disc Material | SS 304 |
| Body Material | Cast Iron (CI) |
| Design | Wafer Type |
| Seat Material | EPDM |
Butterfly valves are quarter-turn valves that regulate or isolate fluid flow using a rotating disc, offering fast operation, compact design, and versatile industrial applications.How Butterfly Valves Work
A butterfly valve consists of a circular disc mounted on a rotating stem. Turning the handle or actuator rotates the disc: when the disc is parallel to the flow, the valve is fully open; when perpendicular, it is fully closed. The valve can also be positioned at intermediate angles to throttle flow, making it suitable for precise flow control This quarter-turn operation allows for quick opening and closing compared to multi-turn valves like gate valves
Main Components
- Valve Body: The housing that connects to the piping system, typically made of cast iron, stainless steel, or other durable materials
- Disc: The flow-controlling element, which rotates to open or close the valve. Disc designs vary to optimize flow, sealing, and torque
- Stem: The shaft connecting the disc to the actuator or handle, available in one-piece or two-piece designs to prevent galling
- Seat: Provides a seal between the disc and body, often made of flexible materials like PTFE or rubber, and can be bonded, pressed, or locked into the body
Types of Butterfly Valves
- Wafer-style: Fits between two pipe flanges; simple and cost-effective but may have a small flow control range
- Lug-style: Threaded inserts allow installation with bolts on each flange; suitable for dead-end service with reduced pressure ratings
- Eccentric/Triple-offset: Designed for higher pressure and temperature applications, providing tight sealing and minimal wear
- Motorized/Electric Actuated: Operated automatically via electric actuators, ideal for remote or automated systems
- Tamper-proof: Equipped with switches to prevent unauthorized operation, often used in fire protection systems
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