The GRACO D51255 is an air-operated double diaphragm pump designed for fluid transfer applications. It features a polypropylene (PP) center section, acetal (AC) seats, and TPE (thermoplastic elastomer) balls and diaphragms, making it suitable for handling a variety of fluids in industrial environments.

Key Features:

• Air-Operated Double Diaphragm Pump
• Husky 515 AC 1/2 in NPT Standard Pump
• PP (Polypropylene) Center Section, AC (Acetal) Seats, TPE (Thermoplastic Elastomer) Balls & Diaphragm
• Maximum free flow delivery: 15 gpm (57 lpm)
• Maximum fluid working pressure: 100 psi (7 bar, 0.7 MPa); Maximum air input pressure: 100 psi (7 bar, 0.7 MPa)
• Designed for use with compatible GRACO Husky 515 series pumps and fluid transfer systems
• Stall-free low pulsation air valve for smooth and rapid changeover
• Bolt-through fluid cover design eliminates leaks and enhances reliability
• Suitable for handling fluids with solids up to 0.09 in (2.5 mm)
• Maximum pump speed: 400 cpm
• Maximum suction lift: 15 ft (4.5 m) dry
• Maximum ambient operating temperature: 150°F (66°C) for polypropylene, 180°F (82°C) for acetal

Applications:
Fluid transfer in industrial, mining, agricultural, and maintenance environments; suitable for handling a wide range of fluids, including those with small solids

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and safety of the pump system
• Ensure proper grounding for conductive wetted parts (acetal models contain stainless steel fibers)
• Follow manufacturer’s instructions for assembly and alignment of components
• Keep a fire extinguisher in the work area and do not operate gasoline engines nearby
• Regularly inspect and maintain diaphragms, balls, and seals for wear and leaks