The GRACO DF4311 is a 2-inch (51 mm) NPT standard air-operated double diaphragm (AODD) pump, featuring an aluminum center section, stainless steel seats, and PTFE balls and diaphragm. It is designed for robust fluid transfer applications in industrial environments, offering high reliability and chemical compatibility.

Key Features:

• Air-Operated Double Diaphragm (AODD) Pump
• Husky 2150, 2 in. (51 mm) NPT
• Aluminum center section, stainless steel seats, PTFE balls and diaphragm
• Up to 150 gpm (568 lpm)
• 120 psi (8.4 bar, 0.84 MPa)
• Compatible with a wide range of fluids, provided they are chemically compatible with wetted parts (see technical specifications for details)
• ATEX rated (II 2 GD Ex h IIC 66°C...135°C Gb, Ex h IIIC T135°C Db)
• Up to 5 times longer diaphragm life compared to other AODD pumps
• Externally accessible air valve for quick, easy servicing without uninstalling the pump
• Fewer parts than industry peers for improved reliability and reduced maintenance
• Epoxy-coated air section for tough environmental conditions
• Lube-free operation
• Overall improved efficiency (up to 40% more efficient)
• Highest fluid flow rate in its class

Applications:
Ideal for transferring a wide range of fluids in industrial, chemical, mining, and agricultural settings. Suitable for applications requiring high flow rates, chemical resistance, and robust construction.

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 all fluids and solvents used are chemically compatible with the wetted parts
• Never move or lift the pump under pressure; always follow the pressure relief procedure before handling
• Have two people lift the pump if necessary due to its weight
• Regularly inspect and maintain the air valve and diaphragm for optimal performance
• Consult the equipment manual for detailed installation and maintenance instructions