Can the system be integrated with external monitoring or building management systems?

The Smart Filtration Controller (SFC80) and Touchscreen Controller (TSC80) provide provisions for integration with external monitoring systems. The controller includes safety and alarm features that can be extended to remote annunciators or building automation systems, enabling centralized monitoring of fuel polishing status and alarm conditions.

STS 6030 and STS 7030 fuel polishing system – automated 30 GPM diesel fuel polisher with NEMA enclosure

Programmable Fuel Polishing System

30 GPM Continuous Flow | 208-230V / 240V / 480V Input | LG-X 4000 Magnetic Conditioner

Fuel Polishing Systems · Automated Diesel Tank Cleaning · NEMA-Rated Enclosure

STS 6030 & STS 7030 Fuel Polishing System – 30 GPM Automated Diesel Fuel Maintenance

The STS 6030 (SFC80 controller) and STS 7030 (TSC80 touchscreen controller) are fully automated, programmable fuel polishing systems that continuously remove water, sludge, and particulate contaminants from diesel and bio-fuel storage tanks. With a robust 30 GPM flow rate and NEMA-rated enclosures, these units ensure reliable fuel quality for standby generators, industrial fuel farms, and marine applications by operating independently on a user-defined schedule.

30 GPM Continuous Flow Rate

240/480 VAC 3Ph / 1Ph Options

1/5/10/25µ Filter Options

Leak + Vacuum Alarm Auto Safety Shutdown

The STS 6030 and STS 7030 are enclosed, plug-and-play fuel polishing solutions designed to preserve the quality of stored diesel and bio-fuels. Each unit draws fuel from the storage tank, passes it through a wye strainer, primary and secondary filter vessels, and an inline magnetic conditioner before returning clean fuel to the tank. The process removes free water, emulsified water, sludge, rust, microbial contamination, and solid particulates down to 1 micron depending on the filter element selected. With a nominal flow rate of 30 GPM (1,800 GPH), either system can polish up to 14,400 gallons of fuel during an eight-hour runtime. Housed in a NEMA 3R-rated powder-coated enclosure, the STS 6030 and STS 7030 are suitable for both outdoor and indoor installations in industrial fuel farms, standby generator sets, marine vessels, and bulk storage terminals.

Key Features

The STS 6030 and STS 7030 are engineered for facilities requiring autonomous diesel polishing with a reliable 30 GPM flow rate. The combination of a smart PLC-based controller (SFC80 or TSC80), continuous-duty 2 HP spur gear pump, two-stage filtration, and LG-X 4000 magnetic conditioner delivers robust fuel maintenance.

Smart Filtration Controller (SFC80 or TSC80): The STS 6030 features the SFC80 Smart Filtration Controller, while the STS 7030 includes the TSC80 Touchscreen Controller. Both offer fully automated, programmable operation. You can schedule start and stop times for each day of the week, enabling hands-off routine fuel maintenance. The controller also provides a clear interface for alarm monitoring, system diagnostics, and service reminders.
Continuous-Duty 2 HP Spur Gear Pump with Viton Seals: A robust 2 HP spur gear pump delivers reliable fuel circulation at the rated flow rate across a range of diesel and bio-fuel viscosities. Viton seals provide excellent chemical compatibility and resistance to fuel degradation, extending service life. The pump is designed for continuous-duty operation, ensuring dependable performance in mission-critical applications.
Two-Stage Filtration Configurable by Micron Rating: The primary filter housing accepts particulate-only or water-block elements in 1, 5, 10, or 25 micron ratings. The secondary filter uses coalescing elements in the same micron range to remove emulsified water and fine particulates. This modular approach lets you tailor the filtration train to the specific contamination challenges of your fuel storage system.
Comprehensive Safety & Alarm Suite: The system includes automatic pump shutdown triggered by any of several monitored conditions: leak detection in the internal containment basin, high vacuum (exceeding 16 in-Hg), high pressure (exceeding 22 PSI), high water accumulation in the separator sump, and low/no flow conditions. A visual alert indication notifies operators when the system requires servicing, protecting both the equipment and the fuel tank from unsafe operation.
Durable NEMA-Rated Enclosure for Harsh Environments: The standard enclosure is NEMA 3R powder-coated steel, providing protection against falling rain, sleet, snow, and external ice formation. For more demanding environments, optional NEMA 4 or NEMA 4X stainless steel enclosures add protection against windblown dust, splashing and hose-directed water, and corrosive conditions. The UL508a-rated controller enclosure ensures electrical safety and reliability.
LG-X 4000 Magnetic Fuel Conditioner: An inline magnetic conditioner that stabilizes diesel and bio-fuels by breaking down and de-clustering paraffin, asphaltene, and other degradation compounds. This passive process improves fuel filterability, enhances combustion efficiency, and extends the overall storage life of the fuel.

Applications

Standby Power Generation (Data Centers, Hospitals, Telecom): Diesel generator reliability depends on clean fuel. The STS 6030 or STS 7030 continuously polishes stored fuel, removing water and microbial contamination that can cause generator starting failures or erratic operation during power outages. Many facilities schedule automatic filtration cycles weekly or monthly to maintain fuel readiness.
Industrial Fuel Storage Farms (Mining, Construction, Agriculture): Bulk diesel stored for heavy equipment and fleet vehicles is susceptible to water condensation, bacterial growth, and particulate accumulation. Installing a dedicated fuel polishing system on the storage tank reduces maintenance costs, prevents fuel system damage, and ensures that every gallon dispensed meets quality standards.
Marine & Offshore Vessels: Marine diesel engines are highly sensitive to contaminated fuel. The STS series removes saltwater intrusion, sludge, and microbial contamination that accumulate over time. The compact, NEMA-rated enclosure withstands the harsh marine environment, and the system can be permanently installed on a vessel's fuel transfer manifold.
Municipal & Government Emergency Response Fuel Depots: Critical infrastructure sites require absolute fuel integrity for backup generators, emergency vehicles, and response equipment. Automated fuel polishing eliminates the labor-intensive task of manual tank inspection and filter changes, while providing documented, auditable fuel maintenance records.
Fuel Distribution Terminals & Bulk Storage: Before fuel is transferred to tanker trucks or day tanks, polishing ensures product quality meets specifications and prevents customer complaints related to contaminated fuel. The 30 GPM flow rate allows rapid turnaround while the two-stage filtration train captures both bulk water and fine particulate matter.

Technical Specifications

Specifications apply to both STS 6030 and STS 7030 fuel maintenance systems. Primary and secondary filter cartridges are interchangeable in 1, 5, 10, or 25 micron ratings. The standard-issue element is the 10µ coalescing secondary filter unless otherwise requested. At 50 Hz, nominal flow rate decreases from 30 GPM to 24 GPM.

Parameter	Specification
Nominal Flow Rate	30 GPM / 1800 GPH (113.6 LPM / 6,814 LPH) (24 GPM / 1,440 GPH at 50 Hz)
Strainer	20 Mesh Wye-Strainer (Brass)
Primary Filter Element	1, 5, 10, or 25µ Particulate or Water Block
Secondary Filter Element	1, 5, 10, or 25µ Coalescing
Fuel Conditioner	LG-X 4000 Inline Magnetic Conditioner
Pump Type	2 HP Spur Gear Pump (Continuous-Duty, Viton Seals)
System Controller	STS 6030: SFC80 Smart Controller / STS 7030: TSC80 Touchscreen Controller
Power Supply	240V/60Hz/3Ph, 480V/60Hz/3Ph, 208-230V/60Hz/1Ph, 230V/50Hz/1Ph
Plumbing Material	Black Iron with Anti-Corrosion Coating
Inlet/Outlet Ports	2" NPT In, 1.5" NPT Out
System Enclosure Rating	NEMA 3R Powder Coated (Standard), NEMA 4 or NEMA 4X Stainless Steel (Optional)
Controller Enclosure Rating	NEMA 4 and UL508a
Dimensions (H × W × D)	≈ 56″ × 72″ × 17″ (142 × 183 × 43 cm)
Weight	≈ 760 lbs (345 kg)
Vacuum Switch Setpoint	16 in-Hg (Factory Calibrated)
Pressure Switch Setpoint	22 PSI (Factory Calibrated)
Safe Maximum Vacuum	18 in-Hg
Safe Maximum Pressure	50 PSI
Fluid Compatibility	Diesel, Bio-fuels (up to B100)
Operating Temperature Range	Ambient: -4°F to 104°F (-20°C to 40°C)
WARNING: 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 nominal flow rate is 30 gallons per minute (GPM), which equals 1,800 gallons per hour (GPH) or 113.6 liters per minute (LPM). When powered by a 50 Hz supply, the flow rate decreases to 24 GPM. Each system can polish up to 14,400 gallons (54,510 liters) of fuel during an 8-hour runtime at 60 Hz.

Yes. Both are housed in a NEMA 3R-rated powder-coated enclosure as standard, which protects against falling rain, sleet, snow, and external ice formation. Optional NEMA 4 and NEMA 4X stainless steel enclosures are available for applications requiring protection against windblown dust, splashing and hose-directed water, or corrosive environments.

The two-stage filtration process removes free water, emulsified water, sludge, rust, microbial contamination, and solid particulate matter. Depending on the filter element selected, particulate removal is effective down to 1 micron. The LG-X 4000 magnetic conditioner further stabilizes the fuel by breaking down paraffin and asphaltene compounds.

The LG-X 4000 is an inline, passive magnetic fuel conditioner that subjects the fuel stream to a strong magnetic field. This process helps break down and de-cluster natural fuel degradation compounds such as paraffin and asphaltene, improving filterability and combustion characteristics, and extending the storage life of the fuel without chemical additives.

The system is capable of a vertical lift of up to 15 feet or a horizontal run of up to 100 feet when using the minimum recommended piping size with no additional restrictions. Any combination of vertical and horizontal runs will reduce the suction capability proportionally.

Routine maintenance includes cleaning the wye-strainer basket, replacing primary and secondary filter elements when pressure differential indicates restriction, and periodically inspecting and cleaning the magnetic conditioner. The system provides visual alarm indications when service is needed, such as a high vacuum alarm signaling a clogged filter or a high pressure alarm indicating filter saturation.