The GRACO D42931 is a Husky 515 air-operated double diaphragm pump with a polypropylene center section, polypropylene seats, stainless steel balls, and PTFE diaphragm. It is designed for reliable, leak-free transfer of a wide range of fluids, including corrosive and abrasive liquids, in industrial and maintenance applications.

Key Features:

• Air-operated double diaphragm pump
• Husky 515, 1/2" BSP
• Polypropylene center section, polypropylene seats, stainless steel balls, PTFE diaphragm
• Up to 15 gpm (57 lpm)
• Maximum fluid working pressure: 100 psi (7 bar, 0.7 MPa)
• Suitable for a wide range of fluids, including corrosive and abrasive liquids
• Stall-free low pulsation air valve for smooth and rapid changeover
• Bolt-through fluid cover design eliminates leaks and enhances safety
• No mechanical seals to cause fluid leaks or failures
• Runs quietly at less than 85 dBa with remote muffler capability
• Easy-to-service air valve and ball checks
• Operates on as little as 20 psi (1.4 bar, 0.14 MPa) air input
• Split manifold option available for pumping multiple fluids without mixing
• Reliable air valve for years of dependable performance

Applications:
Ideal for fluid transfer in industrial, maintenance, and lubrication systems, including handling corrosive and abrasive liquids. Commonly used in mining, agriculture, and manufacturing environments.

Installation Notes:

• Using genuine GRACO parts ensures compatibility, reliability, and safety. Non-genuine parts may compromise performance and void warranties.
• Ensure the pump is properly grounded, especially when pumping conductive or flammable fluids (polypropylene and PVDF models are not conductive)
• Follow all safety instructions in the manual
• Tighten all clamps and connections to prevent leaks
• Inspect and replace damaged o-rings and diaphragms as needed
• Use appropriate fittings and hoses for the intended fluid and pressure
• Regularly inspect air valve, ball checks, and diaphragms for wear or damage
• Clean the pump and fluid system as recommended
• Replace worn or damaged parts with genuine GRACO components
• Use remote muffler for reduced noise in sensitive environments