The GRACO DB3911 is an air-operated double diaphragm pump with an aluminum center section, polypropylene (PP) seats, PTFE balls, and PTFE diaphragm. It is designed for industrial fluid transfer applications, offering robust performance and chemical resistance for handling a wide range of liquids.

Key Features:

• Air-operated double diaphragm pump
• Husky 1590, 1-1/2 in. (38.1 mm) NPT
• Aluminum center section, PP seats, PTFE balls, PTFE 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, including chemicals, oils, and water-based solutions
• Patented, high-reliability closed center air valve
• Online serviceable air valve for quick maintenance
• Epoxy-coated air section for tough environmental conditions
• Up to 5 times longer diaphragm life compared to other air-operated diaphragm pumps in its class
• Fewer parts than industry peers, externally accessible air valve for easy servicing

Applications:
Industrial fluid transfer, including chemicals, oils, antifreeze, detergents, motor oil, hydraulic fluid, cutting oil, and water/wastewater transfer

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and compatibility with existing equipment
• Ensure proper alignment and secure mounting of the pump
• Use appropriate fittings and hoses for the intended fluid and pressure
• Follow manufacturer guidelines for air supply and exhaust port connections
• Regularly inspect and maintain the air valve and diaphragm for optimal operation
• 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