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Hard Seal Three Eccentric Pneumatic Flange Butterfly Valves
The three eccentric butterfly valve is widely employed in industries such as metallurgy, electric power, petrochemicals, water supply and drainage, and municipal construction. It regulates flow and interrupts fluid in pipelines with medium temperatures up to 425°C.
Constructed from materials like cast iron, cast steel, and stainless steel, this valve features a unique design. Its stem axis deviates from both the disc center and the body center simultaneously, while the rotation axis of the valve seat forms a specific angle with the channel axis of the valve body, earning it the name “three eccentric butterfly valve.”
Model: DK67-FB
Size Range: 2”~18”
Pressure Range: 1.6MPa to 6.4MPa
Material: Stainless Steel 304/316
DELCO Trieccentric Butterfly Valve with Pneumatic Actuator
This valve is compact, lightweight, cost-effective, and easy to maintain. It boasts low friction, high efficiency, and high thrust, ensuring excellent safety. Additionally, it offers integrated travel indication, combining the installation of limit switches and solenoid valves without the need for external pipelines, thus minimizing potential leakage points.
With the capability for bidirectional sealing and adjustment, this valve meets diverse operational needs. Various actuator forms are available to accommodate different user requirements. The flexible and combined actuator design, including a manual mechanism, ensures versatile installation and flexible control in all directions.
Technical Parameters of Valve Actuator
Double acting | Air to open, air to close, air supplier failure to keep the current position |
Single acting N/C | Air to open, interrupt air to close, air failure to close |
Single acting N/O | Air to close, interrupt air to open, air failure to open |
Optional accessory | Reversing solenoid valve, limit switch box, air filter reducing valve, positioner, handle manual, lock up valve. |
Technical Parameters of Valve Body
Body | Valve components | ||
Size range | DN50~DN400 | Sealing material | PTFE, PPL, NBR |
Body material | Stainless Steel | Core material | Stainless steel |
End connection | Flange | Stem material | Stainless steel |
Operating pressure | 1.6MPa to 6.4MPa | Applicable media | Control of Water, Air, Gas, Oil, Liquid, Steam |
Structure | Midline Structure/ A-type |
Air source processor: Combines filtering, pressure reduction, and lubrication functions, ensuring stable outlet pressure. Available in two-piece assemblies for filtering compressed instrument air and three-piece configurations for added lubrication.
Pneumatic solenoid valve: Regulates the opening and closing of pneumatic valves by magnetizing and demagnetizing to direct gas flow based on voltage signals. Offers precise control over valve operations, commonly used for managing gas source and circuit flow.
Limit switch: Detects valve status and outputs signals for open or closed positions. Critical in automatic control systems, confirming and executing subsequent programs, providing valve interlock protection, and indicating remote alarms within the system.
Valve positioner: Crucial for precise control over valve positioning in pneumatic control valves, comparing valve stem displacement and controller output signals, adjusting the actuator output signal accordingly.
Manual device: Complements pneumatic actuator assemblies, facilitating manual or pneumatic operation for butterfly and ball valves with a 90° opening. Ensures versatility and flexibility in valve operation, allowing for manual and automated control as needed.