صمام فراشة هوائي ثلاثي الانحراف من طراز D673H بمقعد معدني

صمام فراشة هوائي ثلاثي الانحراف من طراز D673H بمقعد معدني

The D673H pneumatic triple-eccentric butterfly valve uses a flexible stainless steel
U-shaped sealing ring and a polished butterfly disc. The precise triple-eccentric
design allows the sealing surfaces to separate immediately when the valve starts to
open and contact only when the valve closes.

This design significantly reduces sliding friction between the disc and the sealing
ring, improves sealing reliability and extends the service life of the valve. The
valve is suitable for regulating flow and isolating high-temperature, corrosive and
industrial media up to 550°C.

الميزات الرئيسية

• Compact, lightweight and easy-to-install wafer-type construction.
• Stainless steel U-shaped flexible sealing ring for reliable sealing.
• Triple-eccentric design minimizes friction and wear during operation.
• Hard-facing cobalt-based alloy sealing surface for excellent wear resistance.
• Only 90° rotation is required for opening and closing.
• Reliable shut-off performance is not significantly affected by medium pressure.
• Suitable for high-temperature, low-temperature and corrosive service.
• Pneumatic actuation is available in double-acting and spring-return versions.

المعايير المعمول بها

• Design: GB/T 12238-1989
• Flange dimensions: GB/T 9113.1-2000, GB/T 9113.2-2000
• Flange dimensions: GB/T 9115.1-2000, GB/T 9115.2-2000
• Face-to-face dimensions: GB/T 12221-1989
• Pressure testing: GB/T 13927-1992 and JB/T 9092-1999

Pneumatic Actuator

The valve can be equipped with GT-series pneumatic actuators for standard sizes.
Large-diameter valves can use AW-series fork-type pneumatic actuators. Both
double-acting and single-acting spring-return configurations are available.

• Double-piston rack-and-pinion design with high output torque.
• Lightweight aluminium alloy cylinder body.
• Optional manual override installed on the top or bottom.
• Adjustable opening angle and rated flow.
• Optional electrical position feedback and automation accessories.
• ISO 5211 mounting interface for convenient installation and replacement.
• Adjustment screws provide approximately ±4° adjustment at 0° and 90°.

Available Accessories

• On-off accessories: single-solenoid valve, double-solenoid valve and limit switch box.
• Modulating accessories: electro-pneumatic positioner, pneumatic positioner and I/P converter.
• Air preparation: air filter regulator and air treatment FRL unit.
• Manual override: HVSD manual operating mechanism.

التطبيقات النموذجية

• Metallurgical plants
• Power generation systems
• Petroleum and petrochemical pipelines
• Chemical processing systems
• Air and gas pipelines
• Combustible gas service
• Water supply and drainage systems
• High-temperature and corrosive industrial media

Main Dimensions

Dimensions, actuator configuration, materials and pressure-temperature limits are subject to the final WDL Valve technical drawing and approved project datasheet.