The GRACO 647637 is an air-operated double diaphragm pump with a remote aluminum center section, acetal seats, stainless steel balls, and a Buna-N diaphragm. It is designed for reliable transfer of fluids such as water, antifreeze, and fuel in industrial and maintenance applications.

Key Features:

• Air-operated double diaphragm pump
• Husky 1050, 1" BSPT
• Aluminum center section, acetal seats, stainless steel balls, Buna-N diaphragm
• 50 gpm (189 lpm)
• Maximum fluid working pressure: 125 psi (8.6 bar, 0.86 MPa)
• Compatible with a wide range of fluids including water, antifreeze, and fuel; suitable for industrial and maintenance environments
• UL listed (for some models; check specific part for confirmation)
• Stall-free, low pulsation air valve for smooth and rapid changeover
• Remote aluminum center section for flexible installation
• Up to 5 times longer diaphragm life compared to other double diaphragm pumps in its class
• 30% more efficient than the market leader
• Expanded material offering for diverse applications
• Reliable and easy to maintain

Applications:
Industrial fluid transfer, maintenance operations, water, antifreeze, and fuel transfer in mining, agriculture, and other sectors

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, safety, and longevity of the pump
• Install a fluid pressure relief valve at the pump outlet to prevent overpressurization and rupture of the pump or hose
• Use recommended GRACO accessories such as the Fluid Pressure Relief Kit (part number GR238428) for Husky 1050 aluminum diaphragm pumps
• Follow manufacturer guidelines for air supply and fluid connections
• Regularly inspect and maintain diaphragms, balls, and seats for wear and proper function