The GRACO D3A955 Husky 307 is an air-operated double diaphragm pump designed for reliable fluid transfer. It features a polypropylene center section, polypropylene seats, TPE (thermoplastic elastomer) balls, and a TPE diaphragm. This pump is intended for use in applications such as oil transfer and evacuation, fuel dispense and transfer, windshield wash solution dispense, and water and anti-freeze dispense. Some models are UL-approved for pumping gasoline, gasoline/alcohol blends up to 10% ethanol, diesel fuel, fuel oil, and lubricating oil.

Key Features:

• Air-operated double diaphragm pump
• Husky 307 AC (3/8" BSP)
• Polypropylene center section, polypropylene seats, TPE balls, TPE diaphragm
• Up to 7 gpm (26.5 lpm)
• Operates on as little as 20 psi (1.4 bar, 0.14 MPa); fluid pressure up to 100 psi (noted in some sources)
• Suitable for oil, fuel, windshield wash, water, anti-freeze, gasoline (up to 10% ethanol), diesel, fuel oil, lubricating oil
• UL-approved for certain models (gasoline, gasoline/alcohol blends up to 10% ethanol, diesel, fuel oil, lubricating oil)
• Stall-free low pulsation air valve for smooth and rapid changeover
• Quick and easy assembly and disassembly
• Easy-to-service air valve and ball checks
• Split manifold option to pump multiple fluids without mixing
• Every pump is tested prior to shipping
• Fully-groundable acetal model (in some configurations)

Applications:
Oil transfer and evacuation, fuel dispense and transfer, windshield wash solution dispense, water and anti-freeze dispense, pumping gasoline (up to 10% ethanol), diesel fuel, fuel oil, lubricating oil

Installation Notes:

• Ensures compatibility, reliability, and safety in critical fluid transfer applications
• Ensure proper alignment and secure mounting
• Use appropriate fittings for 3/8" BSP porting
• Check for leaks after installation
• Regularly inspect and service air valve and ball checks for optimal performance
• Regularly inspect diaphragms and balls for wear
• Clean pump components as needed to prevent contamination
• Follow manufacturer guidelines for servicing intervals