PTFE Lined Wafer Lug Type Pneumatic Control Butterfly Valve (D671F)

**PTFE Lined Wafer Lug Type Pneumatic Control Butterfly Valve (D671F)**


The **PTFE Lined Wafer Lug Type Pneumatic Control Butterfly Valve (D671F)** is a high-performance control valve designed for precise flow regulation in industrial applications. It features a rotating disc that operates around a fixed axis, controlled by a pneumatic actuator. This valve is ideal for use with electric-gas positioners, electromagnetic valves, air filters, and limit switches, enabling automated control of fluid processes such as flow rate, pressure, temperature, and liquid level. Widely used in gas, liquid, slurry, and powder media, it offers excellent sealing performance and durability. **Key Features of the PTFE Lined Wafer Lug Type Pneumatic Control Butterfly Valve (D671F):** 1. **Low Operating Torque:** The valve requires minimal torque to operate, making it one of the most efficient among all valve types. It allows quick opening and closing, powered by compressed air through a piston rack system that converts linear motion into rotational torque. 2. **Pneumatic Actuation:** Equipped with a double or single-acting pneumatic actuator, it can be controlled using an electric-gas valve positioner. The positioner receives 0–10 mA or 4–20 mA DC signals, converting them into air pressure to adjust the valve's position (0–90°), allowing for precise flow control. 3. **Electromagnetic Valve Control:** With AC 220V or DC 24V power and compressed air, it enables fast on/off control of fluid media, suitable for two-position automation. 4. **High-Torque Design:** The piston and crank mechanism provides large output torque, while the fully sealed waterproof design ensures high protection levels. The cylinder body is mirror-finished, requiring no oil lubrication, which reduces friction and enhances corrosion resistance. Bearings are self-lubricating, ensuring long-term reliability and minimal wear. **Technical Specifications Table:** **PTFE Lined Wafer Lug Butterfly Valve – Additional Information:** - **Nominal Diameter:** DN40 – DN400 (1½" – 16") - **Face-to-Face Dimensions:** EN 558-1 (DIN 3202), ISO 5752, API 609 - **Flange Accommodation:** DIN PN10/PN16, ANSI 150, JIS 5K/JIS 10K - **Top Flange:** ISO 5211 - **Temperature Range:** -40°C to +180°C (depending on operating pressure) - **Operating Pressure:** Max. 10 bar (16 bar for special versions) - **Drive Type:** Hand lever, Gearbox, Pneumatic actuator **Component Material Table:** **Ordering Instructions:** 1. Product type and name 2. Nominal diameter (DN) 3. Nominal pressure 4. Flow characteristics 5. Body materials and trims 6. Medium type and temperature range 7. Inlet and outlet pressure (differential pressure) 8. Seal form 9. Accessories **Contact Information:** Ms Cathy Yongjia Goole Valve Co., Ltd Heyi Industrial Zone, Oubei, Wenzhou, 325105, China Tel: +86-577-57781015 | Fax: +86-577-67985602 Mob: +86 150 5759 6965 Web: www.chinavalve1.com

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