The GRACO DG3955 is a remote air-operated double diaphragm pump designed for heavy-duty fluid transfer applications. It features an aluminum center section, polypropylene seats, TPE balls, and a TPE diaphragm, making it suitable for handling a wide range of chemicals and fluids in industrial settings.

Key Features:

• Air-operated double diaphragm pump (AODD)
• Husky 2150, 2" NPT
• Aluminum center section, polypropylene seats, TPE balls, TPE diaphragm
• 568 L/min (150 gpm) maximum free flow delivery
• 120 psi (8.4 bar, 0.84 MPa) maximum fluid working pressure
• Compatible with a wide range of chemicals and fluids, suitable for industrial fluid transfer
• ATEX T-code rating (dependent on fluid temperature and model); see manual for specific certification details
• Stall-free low pulsation air valve for smooth operation
• Up to 5 times longer diaphragm life compared to previous models
• Overall improved efficiency (up to 40% more efficient)
• Highest fluid flow rate in its class
• Maximum solids handling: 6.35 mm (0.25 in)
• Maximum suction lift: 6.1 m (20 ft) dry
• Maximum pump speed: 145 cycles per minute
• Displacement per cycle: 3.90 liters (1.03 gallons)

Applications:
Industrial fluid transfer, chemical processing, mining, agriculture, and other heavy-duty applications requiring reliable and efficient pumping of liquids, including those with suspended solids up to 6.35 mm in size.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and safety. Non-genuine parts may compromise pump efficiency and longevity.
• Ensure proper alignment and secure mounting of the pump
• Use appropriate fittings and hoses rated for the intended pressure and chemical compatibility
• Install a pressure relief valve at the pump outlet if required by the system to prevent overpressurization
• Check for leaks and proper air supply before operation
• Regularly inspect and maintain diaphragms, balls, and seats according to manufacturer recommendations