The GRACO D31255 is an air-operated double diaphragm pump designed for reliable fluid transfer. It features a polypropylene (PP) center section, acetal (AC) seats, and TPE balls and diaphragm, making it suitable for handling a variety of fluids in industrial and maintenance applications.

Key Features:

• Air-Operated Double Diaphragm Pump
• Husky 307, 3/8 in. (9.52 mm) NPT
• PP Center Section, AC Seats, TPE Balls & TPE Diaphragm, Acetal Housing
• 7 GPM (free flow rate)
• Maximum fluid working pressure: 100 psi (0.7 MPa, 7 bar)
• Compatible with a wide range of fluids including oils, fuels, water, anti-freeze, and some UL-approved models for gasoline, diesel, and lubricating oils
• ATEX Certified
• Stall-free, low pulsation air valve for smooth and rapid changeover
• Quick and easy assembly and disassembly
• Easy to service
• Reliable performance in demanding environments

Applications:
Typical applications include oil transfer and evacuation, fuel dispense and transfer, windshield wash solution dispense, water and anti-freeze dispense, and some models are UL-approved for gasoline, diesel, and lubricating oils.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, safety, and longevity of the equipment.
• Ensure all connections are secure and use appropriate thread sealant for NPT fittings
• Follow torque specifications as outlined in the manual
• Regularly inspect diaphragms and balls for wear and replace as needed
• Use only compatible fluids as specified by GRACO
• Perform routine checks on air and fluid connections
• Clean and inspect the pump after use with aggressive or corrosive fluids
• Refer to the manual for detailed maintenance schedules and procedures