Delavan 7970 'Fat Boy' FB2 Series 12V Diaphragm Pump – 26.5 L/min, 6.9 Bar (100 PSI)

Delavan 7970 ‘Fat Boy’ – High-Flow, High-Pressure 12V Diaphragm Pump

When you need serious flow and pressure, the Delavan 7970 ‘Fat Boy’ delivers. This FB2 Series 12V diaphragm pump pushes up to 26.5 L/min at 6.9 Bar (100 PSI), making it the go-to choice for high-capacity boom spraying, running multiple spot spray guns, and demanding fluid transfer applications. 100% factory tested and made in the USA.

Key Features

• High-Flow Performance – Up to 26.5 L/min (7 GPM) for boom spraying and multi-outlet systems
• High-Pressure Capability – Up to 6.9 Bar (100 PSI) for demanding spray applications
• Bypass / Demand Operation – Built-in pressure switch automatically stops and starts the pump based on system demand
• Heavy Duty Reinforced Diaphragm – Extended service life in tough conditions
• High Torque Motor – Superior flow maintained at pressure
• Run Dry Capable – Safe to run without fluid damage
• Self-Priming – Flexible installation without manual priming
• Viton Valves – Chemical-resistant for herbicides and fertilisers
• Santoprene Diaphragm – Durable across a wide range of fluids
• 5D Quick Release Ports – Fast, tool-free hose connection
• 100% Factory Tested – Every unit verified before dispatch
• Made in USA – Built to last in demanding agricultural conditions

Technical Specifications

• Flow Rate: Up to 26.5 L/min (7 GPM)
• Pressure: Up to 6.9 Bar (100 PSI)
• Pump Type: Bypass / Demand, FB2 Series Diaphragm
• Current Draw: 25A continuous, 35A surge (max)
• Valves: Viton
• Diaphragm: Santoprene
• Ports: 19mm (3/4") 5D Quick Release
• Power: 12V DC
• Weight: 3.63 kg (8 lbs)

Demand Operation – How It Works

The built-in pressure switch automatically stops the pump when outlets are closed and restarts it when flow is needed. This reduces noise during idle and extends pump life. Best suited to multi spray gun spot spraying, soft wash, and single or multi-outlet systems where flow demand varies.

Note: If using low flow applications, consider using a pressure control valve to ensure long pressure switch life.