The GRACO DB3555 is an air-operated double diaphragm pump with an aluminum center section, TPE seats, TPE balls, and TPE diaphragm. It is designed for reliable fluid transfer in demanding industrial environments, compatible with a wide range of fluids and suitable for use within GRACO lubrication and fluid handling systems.

Key Features:

• Air-Operated Double Diaphragm Pump
• Husky 1590 AL, 1-1/2 in. (38.1 mm) NPT
• Aluminum center section, TPE seats, TPE balls, TPE diaphragm
• Maximum fluid working pressure: 120 psi (8.4 bar, 0.84 MPa) for plastic models; for DB3555 (aluminum), consult manual for exact rating, but typically similar or higher
• Compatible with a wide range of fluids, including lubricants, chemicals, and water-based solutions
• Patented, high-reliability closed center air valve (online serviceable)
• Epoxy-coated air section for tough environmental conditions
• Up to 5 times longer diaphragm life compared to other pumps in its class
• Fewer parts than industry peers, air valve externally accessible for quick service
• No seals to leak or fail
• Quiet running (<85 dBa), with remote muffler capability
• Easy-to-service air valve and ball checks

Applications:
Ideal for fluid transfer in industrial, mining, agricultural, and lubrication systems. Suitable for handling a variety of fluids, including lubricants, chemicals, and water-based solutions.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and compatibility with existing equipment.
• Ensure proper alignment and secure mounting of the pump
• Use appropriate fittings and hoses rated for the intended fluid and pressure
• Follow manufacturer’s guidelines for air supply and fluid connections
• Regularly inspect and maintain the pump, especially the air valve and diaphragm, for long service life
• Regularly check for leaks and wear
• Service the air valve and ball checks as recommended
• Replace diaphragms and seats as needed to maintain performance