STS 6004 Programmable Automated Fuel Maintenance & Polishing System

Name: STS 6004 Programmable Automated Fuel Maintenance & Polishing System
Brand: STS

Ensure the reliability of your diesel and biofuels with the STS 6004, a fully automated fuel maintenance system. Designed for permanent installation, this system provides continuous fuel polishing to remove water, sludge, and particulate contaminants from storage tanks, preventing microbial growth and fuel degradation.

4 GPM Nominal Flow Rate

SFC70 Smart Controller

1/3 HP Spur Gear Pump

NEMA 3R Enclosure Rating

The STS 6004 is an industrial-grade, automated fuel polishing system engineered to proactively maintain fuel quality in storage tanks. By operating on a user-defined schedule, it circulates fuel through a multi-stage filtration process to remove free water, sediment, and byproducts of microbial contamination. Housed in a durable, NEMA-rated enclosure, the STS 6004 is suitable for both indoor and outdoor environments in sectors like backup power, marine, and commercial fleet fueling, ensuring that your stored diesel remains within specification and ready for use.

Key Features

The STS 6004 combines a robust mechanical design with intelligent automation, delivering continuous fuel conditioning across the most demanding industrial and commercial environments.

Smart Filtration Controller (SFC70): The heart of the system features a programmable logic controller (PLC) with an LCD display. It allows you to set up to three start/stop cycles per day, offering flexible scheduling for automatic fuel conditioning without manual intervention.
Fully Automated & Programmable Operation: Set a runtime schedule to polish fuel during off-peak hours. The system operates independently once installed, automatically shutting down and alerting you via indicator lights when maintenance like filter changes is required.
Continuous-Duty Spur Gear Pump: Equipped with a robust 1/3 HP spur gear pump and Viton seals, the STS 6004 is built for longevity and chemical compatibility with diesel and bio-fuels, ensuring consistent flow rates even during extended runtimes.
Comprehensive Safety & Alarm Package: Protect your engine and system with integrated alarms. The unit features automatic shutdown for leak detection, high vacuum (clogged primary filter), high pressure (clogged secondary filter), and high water levels in the separator.
Dual-Stage Filtration & Conditioning: The system utilizes a primary water separator/filter (available in 10µ, 30µ, or 60µ SS screen) followed by a secondary fine filter (down to 3µ). An inline LG-X 1500 magnetic fuel conditioner is also included to help stabilize fuel.
NEMA 3R Rated Enclosure: The powder-coated steel enclosure protects internal components from falling rain, sleet, snow, and external ice formation, making the system suitable for sheltered outdoor mounting or indoor mechanical rooms.

Applications

Backup Generator Fuel Storage: Maintain the quality of diesel in standby generators to ensure instant start-up and reliable operation during power outages, preventing wet stacking and injector fouling caused by degraded fuel.
Commercial & Industrial Fuel Depots: Keep large volume storage tanks free of water and sediment. Regular polishing reduces the risk of filter clogging at the dispensing point and extends the life of downstream equipment.
Marine Vessels & Workboats: Combat the effects of condensation and microbial growth in marine fuel tanks. The automated system ensures fuel remains clean for main propulsion and auxiliary engines in harsh saltwater environments.
Fleet Refueling Stations: Integrate the STS 6004 into your bulk storage system to polish fuel as it sits in the tank, eliminating sludge buildup and ensuring that every vehicle receives contaminant-free fuel.
Telecommunications & Data Centers: Ensure the integrity of fuel for critical backup power systems. Automated fuel conditioning maximizes the lifespan of stored fuel, which is vital for facilities requiring 100% uptime.
Agricultural Diesel Storage: Protect expensive farming equipment from water and particulate damage. Routine polishing removes condensation that accumulates in above-ground storage tanks due to daily temperature fluctuations.

Technical Specifications

Key performance and dimensional data for the STS 6004 fuel maintenance system. Specifications are based on standard configuration with 60Hz power supply.

Parameter	Specification
Nominal Flow Rate	4 GPM / 240 GPH (15.1 LPM / 908 LPH)
Primary Filtration	10 or 30µ Particulate / 60µ Stainless Steel Screen w/ Centrifugal Water Separator
Secondary Filtration	3, 10, or 25µ Fine Filter / 3 or 10µ Water Block
Fuel Conditioner	LG-X 1500 Inline Magnetic Conditioner
Pump Type	1/3 HP Spur Gear Pump with Viton Seals
System Controller	SFC70 Smart Filtration Controller with Safety & Alarm Features
Power Options	120V/60Hz/1Ph or 230V/50Hz/1Ph (15A)
Plumbing & Ports	Black Iron, 3/4" NPT Inlet / 3/4" NPT Outlet
System Enclosure	NEMA 3R Rated Powder Coated (Standard)
Controller Enclosure	NEMA 4 and UL508a Rated
Dimensions (H x W x D)	36" x 36" x 12" (91 x 91 x 31 cm)
Weight	Approx. 290 lbs (131.5 kg)
Temperature Range (Operation)	41°F to 104°F (5°C to 40°C)
Suction Capability	15 ft vertical lift or 100 ft horizontal run (primed, >1" line)

Note: At 50 Hz, nominal flow rate decreases to 3.2 GPM / 192 GPH. Not for use with fluids having a flash point below 100°F (37.8°C).

Technical FAQ

Common Questions Answered

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The STS 6004 has a nominal flow rate of 4 gallons per minute (GPM) or 240 gallons per hour (GPH), capable of polishing up to 1,920 gallons in an 8-hour runtime.

It removes water, sludge, microbial contamination, and particulate matter to stabilize diesel and biofuels and ensure fuel reliability.

Yes, it features a NEMA-rated enclosure that protects against rain, sleet, snow, and ice formation, allowing for both outdoor and indoor permanent installations.

The system includes an automatic pump shut-down, leak detection, high vacuum/pressure alarms, and a flow switch to prevent dry running.

Yes, it is highly recommended to plumb the discharge line independently back to the tank, positioned away from the suction pick-up to promote circulation and prevent short-circuiting of the polished fuel.

The 1/3 HP gear pump can handle a vertical lift of up to 15 feet or a horizontal run of 100 feet with primed lines, provided the piping is adequately sized (minimum 3/4" ID).