Keystone AR2 4” 8 Lug CI Wafer Butterfly Valve with A109 Steel Disc 75/175PSI

Keystone Butterfly Valves, a product line under Emerson (formerly part of Tyco Flow Control), are high-quality valves designed for industrial applications. These valves are widely used for their versatility, durability, and efficient flow control in industries such as water treatment, oil and gas, power generation, and chemical processing.

Key Features of Keystone Butterfly Valves:

1. Valve Types:
   • Resilient Seated: For general-purpose applications, offering tight sealing with minimal leakage.
   • High-Performance: Designed for higher pressures and temperatures.
   • Triple Offset: For critical applications requiring zero leakage.
2. Body Styles:
   • Wafer: Fits between two flanges.
   • Lugged: Allows downstream removal of piping without affecting the upstream side.
   • Double Flanged: Provides robust mounting for high-pressure systems.
3. Material Options:
   • Body: Cast iron, ductile iron, stainless steel, or carbon steel.
   • Disc: Stainless steel, aluminum bronze, or other materials depending on the medium.
   • Seat: EPDM, PTFE, NBR, or other elastomers for compatibility with different fluids.
4. Size Range:
   • Typically available in sizes from 2 inches to over 72 inches, depending on the specific series.
5. Pressure Ratings:
   • Resilient-seated valves generally rated up to 150 PSI.
   • High-performance models can handle higher pressures.
6. Operation:
   • Operable via manual (lever or gear) or automated actuators (electric, pneumatic, or hydraulic).
7. Standards Compliance:
   • Meets international standards like API 609, ISO 5752, and ASME B16.34.

Applications:

1. Water and Wastewater:
   • For flow isolation and control in municipal and industrial water systems.
2. Chemical Processing:
   • Handles aggressive fluids with specialized seat and disc materials.
3. HVAC:
   • Balancing and control in heating, ventilation, and air conditioning systems.
4. Power Generation:
   • Steam, cooling water, and other fluid control.
5. Food and Beverage:
   • Hygienic designs available for food-grade applications.