• Model: FloMax FNBL-59X Ball Lock Piston Spring (Extra)
• Compatibility: FNBL ball lock series diesel fuel nozzles (fits same locations as standard piston spring, for increased tension or duty)
• Material: Extra-strength high-tensile steel; precision wound for maximum fatigue resistance in high-pressure, high-flow applications
• Function:
  • Provides increased piston return force for heavy duty fueling, fast shutoff, or specialized field service environments
  • Delivers reliable actuation with less vibration, more consistent seal pressure, and extra-long service intervals
  • Patented FloMax design keeps spring enclosed and out of the fuel path, maximizing flow and minimizing turbulence
• Design Features:
  • Replaces or upgrades standard FNBL-59 piston spring
  • Factory adjustable shut-off pressures possible (up to 13 PSI or higher)
• Applications: Heaviest-duty fueling, mining, fleet, and construction use cases; sites requiring rapid nozzle actuation and high flow shutoff

The FNBL-59X piston spring delivers enhanced reliability for FNBL Ball Lock nozzles in the most extreme fueling situations, supporting repeatable, high-cycle operation.