The GRACO DB4666 is a stainless steel (SS) air-operated double diaphragm pump with a 1-1/2 in. (38.1 mm) NPT standard connection, featuring an aluminum center section, SP seats, SP balls, and SP diaphragm. It is designed for industrial fluid transfer applications, offering robust construction and compatibility with a wide range of fluids.

Key Features:

• Air-operated double diaphragm pump
• Husky 1590, 1-1/2 in. (38.1 mm) NPT
• Stainless steel fluid section, aluminum center section, SP seats, SP balls, SP diaphragm
• Maximum free flow delivery: 100 gpm (378.5 lpm)
• Maximum fluid working pressure: 120 psi (8.4 bar, 0.84 MPa)
• Compatible with a wide range of industrial fluids (e.g., water, wastewater, oils, detergents, antifreeze, hydraulic fluids)
• Patented, high-reliability closed center air valve
• Online serviceable air valve
• Epoxy-coated air section for tough environments
• Externally accessible air valve for quick, easy maintenance without uninstalling the pump
• Up to 5 times longer diaphragm life compared to other air-operated diaphragm pumps in its class
• Fewer parts than industry peers

Applications:
Industrial fluid transfer, including water, wastewater, oils, detergents, antifreeze, hydraulic fluids, and more. Suitable for mining, agriculture, and other heavy-duty environments.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and longevity of the pump. Non-genuine parts may compromise safety and efficiency.
• Ensure proper alignment and secure mounting of the pump
• Use appropriate fittings and seals for the intended fluid and pressure
• Follow manufacturer guidelines for air supply and fluid connections
• Regularly inspect and maintain the air valve and diaphragm for optimal performance
• Perform routine checks on the air valve and diaphragm
• Replace worn or damaged parts with genuine GRACO components
• Keep the pump clean and free from debris
• Monitor for leaks and unusual noises during operation