The GRACO D3B911 is a 3/8 inch air-operated double diaphragm pump with a polypropylene (PP) center section, PP seats, PTFE balls, and PTFE diaphragm. It is designed for reliable, low-maintenance fluid transfer in industrial and maintenance applications, including oil, fuel, water, and anti-freeze handling.

Key Features:

• Air-operated double diaphragm pump
• Husky 307, 3/8 inch (9.52 mm) BSP
• Polypropylene center section, polypropylene seats, PTFE balls, PTFE diaphragm
• 6.5–7 gpm (26.5 l/min)
• Maximum fluid discharge pressure: 100 psi (7 bar, 0.7 MPa)
• Suitable for oil, fuel, water, anti-freeze, and similar fluids; some models UL-approved for gasoline, diesel, fuel oil, and lubricating oil
• Stall-free low pulsation air valve for smooth operation
• Quick and easy assembly and disassembly
• Easy-to-service air valve and ball checks
• Operates on as little as 20 psi (1.4 bar, 0.14 MPa)
• Split manifold option to pump multiple fluids without mixing
• Every pump is tested prior to shipping
• Maximum size pumpable solids: 1/16 inch (1.5 mm)

Applications:
Oil transfer and evacuation, fuel dispense and transfer, windshield wash solution dispense, water and anti-freeze dispense, and similar industrial fluid handling tasks. Some models are suitable for gasoline, diesel, fuel oil, and lubricating oil transfer.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and safety. Non-genuine parts may compromise pump efficiency and longevity.
• Ensure all connections are secure and compatible with 3/8 inch BSP fittings
• Check for leaks after installation
• Follow manufacturer guidelines for air supply (minimum 20 psi)
• Regularly inspect and service air valve and ball checks for smooth operation
• Use the split manifold option if pumping multiple fluids to prevent mixing