The GRACO D3B331 is an air-operated double diaphragm pump designed for reliable fluid transfer. It features a polypropylene (PP) center section, stainless steel (SS) seats and balls, and a PTFE diaphragm, making it suitable for handling a wide range of chemicals and fluids in industrial applications.

Key Features:

• Air-operated double diaphragm pump
• Husky 307 PP (3/8 in. BSP)
• PP center section, SS seats, SS balls, PTFE diaphragm
• Up to 7 gpm (26.5 lpm)
• Maximum fluid working pressure: 100 psi (0.7 MPa, 7 bar); Operates on as little as 20 psi (1.4 bar, 0.14 MPa) air input
• Designed for use with a variety of chemicals and fluids; compatible with GRACO Husky 307 series equipment
• Quick and easy assembly and disassembly
• Easy to service air valve and ball checks
• Stall-free low pulsation air valve for smooth and rapid changeover
• Split manifold option to pump multiple fluids without mixing
• Every pump is tested prior to shipping
• Fully-groundable acetal model (note: this specific model is PP, but the series includes acetal options)
• 3/8 in (9.52 mm) BSP end porting

Applications:
Ideal for transferring chemicals, solvents, and other industrial fluids in manufacturing, lubrication, and maintenance environments. Suitable for use in mining, agriculture, and other industries requiring robust, chemical-resistant pumps.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and safety. Non-genuine parts may compromise pump integrity and void warranties.
• Ensure all connections are tight and leak-free before operation
• Verify compatibility of fluids with pump materials (PP, SS, PTFE)
• Follow manufacturer guidelines for air pressure settings (minimum 20 psi, maximum 100 psi fluid working pressure)
• Regularly inspect and service air valve and ball checks for optimal performance
• Consult the equipment manual for detailed installation and maintenance procedures