ALFA 8″ LUG BUTTERFLY VALVE DUCTILE IRON BODY BUNA SEAT NICKEL PLATED DI DISC

The ALFA 8″ Lug-Style Butterfly Valve is engineered for high-performance isolation and control in industrial piping systems. Featuring a ductile iron body for superior strength and impact resistance, a resilient Buna-N (Nitrile) seat for tight sealing, and a nickel-plated ductile iron disc for corrosion resistance and smooth operation, this valve is built for durability and long service life. The lug-style design allows for easy installation and removal in dead-end service or downstream maintenance, making it ideal for a wide range of applications including HVAC, water treatment, chemical processing, and general industrial service.

Key Features & Benefits:

• Robust Lug Design: The threaded lug bosses permit bolt-on connection to mating flanges without nuts, enabling secure installation and easy removal of downstream piping for service. Suitable for dead-end service applications.
• Ductile Iron Body: Provides excellent tensile strength, durability, and shock resistance compared to standard cast iron, ensuring reliable performance in demanding environments.
• Nickel-Plated Ductile Iron Disc: The nickel plating creates a hard, corrosion-resistant barrier on the disc, reducing wear, minimizing scaling, and ensuring smooth, low-torque operation over thousands of cycles.
• Buna-N (NBR) Elastomeric Seat: Offers exceptional sealing performance and resistance to a wide range of fluids, including water, oils, fuels, and many chemicals. Provides a bubble-tight shut-off and excellent resilience.
• Standard Configuration: Typically includes a standard 5-hole lug pattern compatible with ANSI Class 125/150 flanges, a 2″ square operator for manual quarter-turn operation (gearbox and actuator adaptable), and a stainless steel stem for reliable torque transmission and corrosion resistance.
• Versatile Application: Ideal for use in:
  • Cooling Water & Chilled Water Systems
  • Municipal Water & Wastewater Treatment
  • HVAC & Fire Protection Systems
  • Industrial Process Lines
  • General On/Off and Throttling Service

Technical Specifications:

• Size: 8″ (Nominal Pipe Size)
• Valve Style: Lug-Type Butterfly Valve
• Body Material: Ductile Iron (ASTM A536)
• Disc Material: Ductile Iron with Nickel Plating
• Seat Material: Buna-N (Nitrile Rubber)
• Stem Material: Stainless Steel (Typically 416 or 17-4PH)
• Flange Standard: ANSI Class 125/150 (Standard 5-hole pattern)
• End Connection: Lugged (Threaded Holes)
• Pressure Rating: Typically 150 PSI (WOG) / 200 PSI (Non-Shock Cold Water)
• Temperature Range: -20°F to +250°F (Dependent on seat material)
• Operation: Manual (Lever or 2″ Square Gear Operator), with option for pneumatic or electric actuation.