The GRACO D51911 is a standard air-operated double diaphragm (AODD) pump featuring an acetal body with a polypropylene center section, polypropylene seats, PTFE balls, and PTFE diaphragm. It is designed for reliable transfer and evacuation of fluids in industrial and maintenance applications, offering chemical resistance and robust performance.

Key Features:

• Air-Operated Double Diaphragm (AODD) Pump
• Husky 515, 1/2" NPT
• Acetal body, polypropylene center section, polypropylene seats, PTFE balls, PTFE diaphragm
• Maximum free flow delivery: 15 gpm (57 lpm) (varies by configuration and operating conditions; typical commercial listings may cite 12 gpm for similar models)
• Maximum fluid working pressure: 100 psi (7 bar, 0.7 MPa)
• Suitable for a wide range of chemicals, compatible with acetal, polypropylene, and PTFE materials; consult GRACO chemical compatibility guides for specific fluids
• ATEX rated for hazardous environments (specific rating depends on model and configuration; consult manual for details)
• Easy-to-service air valve and ball checks
• Reliable air valve for years of dependable performance
• Fully groundable acetal model for static safety
• Positive displacement design for consistent flow
• Can operate on as little as 20 psi air pressure
• Maximum pump speed: 400 cycles per minute
• Maximum suction lift: 15 ft (4.5 m) dry
• Maximum size pumpable solids: 0.09 in (2.5 mm)

Applications:
Used for transferring and evacuating fluids in industrial, maintenance, and lubrication applications. Suitable for use in mining, agriculture, and other sectors requiring robust, chemical-resistant fluid handling.

Installation Notes:

• Using genuine GRACO parts ensures compatibility, safety, and optimal performance. Non-genuine parts may compromise pump integrity and safety.
• Ensure the pump is properly grounded before operation to prevent static discharge and explosion hazards
• Install a fluid pressure relief valve at the pump outlet to prevent overpressurization and rupture of the pump or hose
• Use conductive hoses and ensure the dispense valve nozzle is in contact with the container for grounding
• Follow all safety instructions in the GRACO manual, including grounding requirements and chemical compatibility checks
• Regularly inspect and maintain the pump, including checking diaphragms, balls, and seats for wear