The GRACO DB4388 is a 1-1/2" NPT standard air-operated double diaphragm pump featuring a stainless steel fluid section, aluminum center section, stainless steel seats, and fluoroelastomer balls and diaphragm. It is designed for reliable fluid transfer in demanding industrial environments.

Key Features:

• Air-Operated Double Diaphragm Pump
• Husky 1590, 1-1/2" NPT
• Stainless steel fluid section, aluminum center section, stainless steel seats, fluoroelastomer balls and diaphragm
• Maximum free flow delivery: 100 gpm (378.5 lpm)
• Maximum fluid working pressure: 120 psi (8.4 bar, 0.84 MPa)
• Suitable for a wide range of industrial fluids, including chemicals, oils, and water-based solutions
• Patented, high-reliability closed center air valve
• Online serviceable air valve
• Designed for tough environmental conditions
• Robust construction for long service life
• Ease of maintenance and repair

Applications:
Industrial fluid transfer, chemical processing, oil and lubricant handling, wastewater transfer, and other demanding applications where reliability and chemical resistance are required.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, safety, and longevity of the pump. Non-genuine parts may compromise reliability and void warranties.
• Ensure proper grounding as per manual instructions
• Use recommended air supply and filtration
• Install bleed-type master air valve and air regulator
• Follow recommended hose and connection sizes
• Regularly inspect and maintain diaphragms and seals
• Consult manual for specific installation and maintenance procedures