The GRACO DFD666 is a 2-inch (51 mm) air-operated double diaphragm pump with a stainless steel fluid section, aluminum center section, and Santoprene (SP) seats, balls, and diaphragms. It is designed for high-efficiency, reliable fluid transfer in demanding industrial environments, handling a wide range of liquids including those with solids.

Key Features:

• Air-operated double diaphragm pump
• Husky 2150, 2 in. (51 mm) BSP
• Stainless steel fluid section, aluminum center section, Santoprene (SP) seats, balls, and diaphragms, PTFE O-rings
• Up to 150 gpm (568 lpm)
• Up to 120 psi (8.4 bar, 0.84 MPa)
• Compatible with a wide range of industrial fluids and slurries; available in multiple materials (aluminum, stainless steel, ductile iron, polypropylene, PVDF)
• Stall-free, low pulsation air valve for smooth operation
• Lube-free operation
• Epoxy-coated air section for tough environments
• Externally accessible air valve for easy maintenance
• Up to 40% more efficient than comparable pumps
• Up to 5 times longer diaphragm life
• Handles solids up to 1/4 inch (6.3 mm)
• Fewer parts for easier servicing

Applications:
Ideal for transferring liquids and slurries in industries such as mining, agriculture, chemical processing, and general industrial applications. Suitable for handling fluids with suspended solids.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and longevity of the pump. Non-genuine parts may compromise efficiency and safety.
• Ensure proper alignment of inlet and outlet connections
• Use appropriate gaskets and seals for the fluid being handled
• Follow manufacturer guidelines for air supply and pressure settings
• Regularly inspect and maintain the air valve and diaphragms for wear
• Keep the pump clean and free from debris to prevent clogging