The GRACO 647055 is an air-operated double diaphragm pump featuring a standard aluminum center section, aluminum seats, Santoprene balls, and Santoprene 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" NPT
• Aluminum center section, aluminum seats, Santoprene balls, Santoprene diaphragm
• Maximum free flow delivery: 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
• Stall-free low pulsation air valve for smooth operation
• Spring-loaded pilot valves for faster changeover and reduced pulsation
• Externally serviceable components
• Bolted joint design for even sealing pressure and leak reduction
• Long diaphragm life (up to 5x longer than competitors)
• One-piece center section eliminates leaks and reduces maintenance frequency

Applications:
Industrial fluid transfer, maintenance, lubrication, and fuel handling in mining, agriculture, and other sectors

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and compatibility with existing equipment.
• Ensure proper alignment and secure bolting of the center section
• Use appropriate thread sealant for NPT connections
• Check diaphragm and ball condition before installation
• Follow manufacturer’s torque specifications for all fasteners
• Regularly inspect for leaks and wear
• Periodically inspect and replace diaphragms and balls as needed
• Clean and lubricate moving parts according to schedule
• Check for and address any leaks promptly
• Use only genuine GRACO replacement parts for repairs