System Solutions

Enclosed Fuel
Maintenance Systems (STS)

AXI International’s STS products are programmable, fully automated, fuel maintenance systems that remove water, sludge, and other contaminants from fuel storage tanks. Once installed, the STS systems work autonomously to ensure fuel reliability through scheduled routine filtration. The system’s fuel polishing process stabilizes diesel and bio-fuels, eliminates microbial contamination, and ensures fuel remains contamination free. These enclosed fuel maintenance systems feature NEMA 4 rated enclosures which are specifically designed for permanent installations either indoor or outdoor to service both Above Ground Storage Tanks (AST) and Underground Storage Tanks (UST).

Schedule Automated Fuel Polishing Runs

All STS fuel maintenance systems are fully automated and can be programmed with a weekly routine for the polishing/filtration of the attached tank and fuel supply.

NEMA Rated System Enclosures

Each STS system is constructed inside a standard powder coated NEMA 4 rated cabinet featuring a drip basin with leak detection to alert users in the unlikely event of a fuel leak.

Smart System Alarms & BMS Integration

All STS systems feature smart system alarms giving users insight on system statuses. Each system also features field connections for remote monitoring and shutdown.

Robust System Options & Upgrades*

All 7000 series STS systems have robust system upgrade options to reduce maintenance intervals, increase ease of use, and expand system servicing capabilities.

Available Systems:

fuel polishing system sts 6000 p35

STS 6000 SX-F

  • Flow Rate: 2.5 GPM/150 GPH
  • Power: 120V/60Hz, 230V/50Hz/15A
  • Dimensions: 30” x 24“ x 10” (76 x 61 x 25 cm)
STS 6003 system image

STS 6003

  • Flow Rate: 3 GPM/180 GPH
  • Power: 120V/60Hz, 230V/50Hz/15A
  • Dimensions: 36” x 36“ x 12” (91 x 91 x 31 cm)
fuel polishing system sts 6004

STS 6004

  • Flow Rate: 4 GPM/240 GPH
  • Power: 120V/60Hz, 230V/50Hz/15A
  • Dimensions: 36” x 36“ x 12” (91 x 91 x 31 cm)
fuel polishing system sts 6010

STS 6010

  • Flow Rate: 10 GPM/600 GPH
  • Power: 120V/60Hz, 230V/50Hz/15A
  • Dimensions: 37” x 60“ x 12” (94 x 152 x 31 cm)
fuel polishing system sts 6020

STS 6020

  • Flow Rate: 20 GPM/1200 GPH
  • Power: 120V/60Hz, 230V/50Hz/15A
  • Dimensions: 37” x 60“ x 12” (94 x 152 x 31 cm)
fuel polishing system sts 6030

STS 6030

  • Flow Rate: 30 GPM/1800 GPH
  • Power: 480V/60Hz, 230V/50Hz/15A
  • Dimensions: 56" x 72" x 17" (142 x 183 x 43 cm)
fuel maintenance system 6000 series

STS 6000 P-35

  • Flow Rate: 30 GPM/1800 GPH
  • Power: 120V/60Hz/20A
  • Dimensions: 56" x 72" x 17" (142 x 183 x 43 cm)
fuel polishing system sts 6040

STS 6040

  • Flow Rate: 40 GPM/2400 GPH
  • Power: 480V/60Hz, 230V/50Hz/15A
  • Dimensions: 56" x 72" x 17" (142 x 183 x 43 cm)
STS 7003 system image

STS 7003

  • Flow Rate: 3 GPM/180 GPH
  • Power: 120V/60Hz, 230V/50Hz/15A
  • Dimensions: 36” x 36“ x 12” (91 x 91 x 31 cm)
fuel polishing system sts 7004

STS 7004

  • Flow Rate: 4 GPM/240 GPH
  • Power: 120V/60Hz, 230V/50Hz/15A
  • Dimensions: 36” x 36“ x 12” (91 x 91 x 31 cm)
fuel polishing system sts 7010

STS 7010

  • Flow Rate: 10 GPM/600 GPH
  • Power: 120V/60Hz, 230V/50Hz/15A
  • Dimensions: 37” x 60“ x 12” (94 x 152 x 31 cm)
fuel polishing system sts 7020

STS 7020

  • Flow Rate: 20 GPM/1200 GPH
  • Power: 120V/60Hz, 230V/50Hz/15A
  • Dimensions: 37” x 60“ x 12” (94 x 152 x 31 cm)
fuel polishing system sts 7030

STS 7030

  • Flow Rate: 30 GPM/1800 GPH
  • Power: 480V/60Hz, 230V/50Hz/15A
  • Dimensions: 56" x 72" x 17" (142 x 183 x 43 cm)
fuel maintenance system sts 7000p

STS 7000 P-35

  • Flow Rate: 30 GPM/1800 GPH
  • Power: 120V/60Hz/20A
  • Dimensions: 56" x 72" x 17" (142 x 183 x 43 cm)
fuel polishing system sts 7040

STS 7040

  • Flow Rate: 40 GPM/2400 GPH
  • Power: 480V/60Hz, 230V/50Hz/15A
  • Dimensions: 56" x 72" x 17" (142 x 183 x 43 cm)
STS Enclosed Fuel Maintenance System Programmable Runtime Graphic

Schedule Automated Fuel Polishing Runs

  • Keep your fuel free of contaminants through continual routine filtration with our automated fuel maintenance systems.
  • Set a weekly schedule that programs your STS system to run automatically throughout the week.
  • Simply select the days you want your system to filter the fuel and enter up to three start and stop times per day.

NEMA Rated System Enclosures

  • Ensure your system's components are protected from the elements such as windblown dust and rain with NEMA 4 rated enclosures. For extreme environments, upgrade to NEMA 4X rated Stainless Steel enclosures for additional protection against corrosion.
  • Prevent any unnecessary ground contamination during routine system maintenance with a built in drip basin designed to collect any excess fluids.
  • Be alerted in the unlikely case of a system leak with a leak detection float sensor mounted to the back of the system's drip basin.
STS Enclosed Fuel Maintenance System NEMA Rated Enclosure
STS Enclosed Fuel Maintenance System Smart Alarm and BMS Integration Graphic

Smart System Alarms & BMS Integration

  • Get realtime feedback on system statuses via the system's alarms and feedback modules. Know when it is time to change filters and be notified of system errors right as they occur.
  • Integrate your STS fuel maintenance system into your building management system (BMS) for remote monitoring of system statuses and remote system shutdown capabilities.

Robust System Options & Upgrades

  • All 7000 Series STS systems feature an intuitive touchscreen controller that expands the system's capability for system upgrades.
  • Service Multiple fuel storage tanks with a single STS fuel maintenance system via our Multi-Tank system upgrade.
  • Treat your fuel with precision through our Auto Additive Injection upgrade. Simply choose the additive of your choice, enter the desired concentration ratio, and our fuel maintenance system will do the rest.
STS Enclosed Fuel Maintenance System Auto Water Drain (AWD) Upgrade