The GRACO D42977 is a polypropylene air-operated double diaphragm pump designed for reliable fluid transfer in industrial environments. It features a polypropylene center section and seats, with Buna-N balls and diaphragms, making it suitable for handling a wide range of chemicals and fluids.

Key Features:

• Air-operated double diaphragm pump
• Husky 515, 1/2" NPT
• Polypropylene center section and seats, Buna-N balls and diaphragms
• Maximum flow rate: 15 gpm (57.7 lpm)
• Maximum discharge pressure: 100 psi
• Compatible with a wide range of chemicals and fluids; all wetted and non-wetted parts must be compatible with the fluid being pumped
• Stall-free, low pulsation air valve for smooth and rapid changeover
• Easy-to-service air valve and ball checks
• Reliable air valve for years of dependable performance
• Fully-groundable acetal model available (not this specific part)
• Maximum pumpable solids: 0.09 in

Applications:
Used for evacuating and transferring fluids in industrial, chemical, and maintenance applications. Suitable for professional use in environments requiring robust, chemical-resistant pumps.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, safety, and longevity of the pump.
• Ensure all wetted and non-wetted pump parts are compatible with the fluid being pumped
• Use electrically conductive air supply and fluid supply lines where required
• Install a bleed-type master air valve, air line filter, and air regulator as recommended
• Connect a ground wire to the grounding screw for safety
• Install a fluid drain valve as required
• Vent exhaust air appropriately and use a muffler if needed
• Regularly inspect and service air valve and ball checks
• Check for wear on diaphragms and replace as necessary
• Follow manufacturer’s guidelines for maintenance intervals