The GRACO DB4811 is a Husky 1590 series air-operated double diaphragm pump with a 1-1/2" NPT connection, featuring a stainless steel fluid section, aluminum center section, flouroelastomer seats, PTFE balls, and PTFE diaphragms. It is designed for reliable transfer of a wide range of fluids, including abrasive, viscous, and corrosive liquids, in industrial and process applications.

Key Features:

• Air-operated double diaphragm pump
• Husky 1590, 1-1/2" NPT
• Stainless steel fluid section, aluminum center section, flouroelastomer seats, PTFE balls, PTFE diaphragms
• Maximum free flow delivery: 100 gpm (378.5 lpm)
• Maximum fluid working pressure: 120 psi (8.4 bar, 0.84 MPa)
• Compatible with a wide range of industrial fluids, including abrasive, viscous, and corrosive liquids
• Patented, high-reliability closed center air valve
• Online serviceable
• Epoxy-coated air motor for corrosion resistance
• Robust construction for long service life
• Handles solids up to 0.19 in (4.8 mm)
• Maximum suction lift: 20 ft (6.1 m) dry
• Maximum operating temperature: 150°F (65.5°C)
• Maximum pump speed: 200 cpm
• Displacement per cycle: 0.5 gallon (1.96 liter)

Applications:
Ideal for transferring abrasive, viscous, or corrosive fluids in industries such as mining, agriculture, chemical processing, and general industrial maintenance. Suitable for applications requiring reliable, low-maintenance fluid transfer.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and safety. Non-genuine parts may compromise pump efficiency and longevity.
• Ensure all connections are secure and leak-free before operation
• Follow manufacturer’s torque specifications for assembly
• Check for proper alignment and support of piping
• Inspect diaphragms and seats for wear during installation and maintenance
• Refer to the GRACO manual for detailed installation and maintenance procedures
• Regularly inspect and replace diaphragms, balls, and seats as needed
• Keep air supply clean and dry to prevent contamination
• Lubricate moving parts according to manufacturer recommendations
• Monitor pump performance and address unusual noise or vibration promptly