The GRACO D3B335 Husky 307 is an air-operated double diaphragm pump with a polypropylene center section, stainless steel seats, stainless steel balls, and a TPE diaphragm. It is designed for reliable transfer of a wide range of fluids, including oils, fuels, detergents, and water, in industrial and maintenance applications.

Key Features:

• Air-operated double diaphragm pump
• Husky 307, 3/8" BSP
• Polypropylene center section, stainless steel seats and 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 for similar models, confirm for D3B335)
• Compatible with oils, fuels, detergents, antifreeze, water, and more
• Some models UL-approved for gasoline, gasoline/alcohol blends up to 10% ethanol, diesel fuel, fuel oil, and lubricating oil (confirm for D3B335)
• Quick and easy assembly and disassembly
• Easy to service air valve and ball checks
• Stall-free low pulsation air valve for smooth operation
• Split manifold option for pumping multiple fluids without mixing
• Every pump tested prior to shipping

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

Installation Notes:

• Ensures compatibility, reliability, and safety in operation
• Ensure correct porting (3/8" BSP)
• Check air supply is at least 20 psi
• Inspect and clean ball checks and air valve regularly
• Use split manifold option if pumping multiple fluids to prevent mixing
• Regularly inspect and service air valve and ball checks
• Use genuine replacement parts for repairs
• Follow manufacturer’s recommended maintenance schedule