The GRACO D3B977 Husky 307 PP is an air-operated double diaphragm pump featuring a polypropylene (PP) center section, PP seats, BN (butyl nitrile) balls, and BN diaphragm. It is designed for reliable transfer of a wide range of fluids, including oils, fuels, and chemicals, within industrial and maintenance applications.

Key Features:

• Air-operated double diaphragm pump
• Husky 307 PP (3/8 in. BSP)
• Polypropylene (PP) center section, PP seats, BN balls, BN diaphragm
• Up to 7 gpm (26.5 lpm)
• Operates on as little as 20 psi (1.4 bar, 0.14 MPa)
• Suitable for oil transfer and evacuation, fuel dispense and transfer, windshield wash solution dispense, water and anti-freeze dispense; some models UL-approved for gasoline, gasoline/alcohol blends up to 10% ethanol, diesel fuel, fuel oil, and lubricating oil
• UL-approved for certain models (see compatibility)
• 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
• Fully groundable (acetal or polypropylene housing)
• Every pump is tested prior to shipping

Applications:
Oil transfer and evacuation, fuel dispense and transfer, windshield wash solution dispense, water and anti-freeze dispense, and other industrial fluid transfer tasks.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and safety, and maintains warranty coverage.
• Install a bleed-type master air valve between the fluid inlet and outlet ports as required
• Ensure proper grounding for safety
• Use recommended air supply pressure (minimum 20 psi)
• Follow all warnings and instructions in the manual for installation and maintenance
• Regularly inspect and service air valve and ball checks for continued reliability
• Refer to the equipment manual for detailed installation and maintenance procedures
• Use only compatible fluids as specified by GRACO
• Perform regular maintenance checks to ensure long service life