The STS 6000 P-35 is a programmable, fully automated fuel maintenance system engineered to remove water, sludge, and other contaminants from diesel and bio-fuel storage tanks. Designed for both indoor and outdoor installations, this system operates with an external pump to passively polish fuel, stabilize quality, and eliminate microbial contamination. Its NEMA-rated enclosure ensures reliable protection against falling rain, sleet, snow, and external ice formation, making it a robust solution for various industrial environments.
The STS 6000 P-35 is a sophisticated automated fuel maintenance solution designed to proactively manage and improve the quality of stored diesel and bio-fuels. By continuously recirculating fuel through a multi-stage filtration process, the system effectively removes harmful water, sludge, and microbial contaminants. This programmable unit operates in coordination with an external pump and includes a Smart Filtration Controller for precise scheduling. Engineered for reliability, it is housed in a durable NEMA 3R-rated enclosure, providing protection against the elements for both outdoor and indoor deployment. The system is ideal for critical applications such as emergency generators, fleet fueling stations, and industrial storage facilities where fuel integrity is paramount.
The STS 6000 P-35 combines robust mechanical design with intelligent electronic controls, delivering reliable diesel fuel maintenance across demanding industrial and commercial environments.
Key performance and dimensional data for the STS 6000 P-35 fuel polishing system. Specifications are based on standard configuration; options may alter values.
| Parameter | Specification |
|---|---|
| Model | STS 6000 P-35 |
| Nominal Flow Rate | 30 GPM / 1800 GPH (113.6 LPM / 6,814 LPH) |
| Primary Filter Element Options | 1, 5, 10, or 25µ Coalescing Filter |
| Secondary Filter Element Options | 3, 10, or 25µ Fine Filter or 3, 10µ Water Block |
| Fuel Conditioner | LG-X 4000 Inline Magnetic Conditioner |
| System Controller | SFC80 Smart Filtration Controller with Safety and Alarm Features |
| Power Options | 120V/60Hz/1Ph, 230V/50Hz/1Ph, or 208-230V/60Hz/1Ph |
| Plumbing Material | Black Iron |
| Port Connections | 1.5" NPT Inlet, 1.5" NPT Outlet |
| Standard Enclosure Rating | NEMA 3R Rated Powder Coated |
| Optional Enclosure Ratings | NEMA 4 or NEMA 4X (Stainless Steel) |
| System Dimensions (H x W x D) | Approx. 56" x 72" x 17" (142 x 183 x 43 cm) |
| System Weight | Approx. 404 lbs (183.3 kg) |
| Controller Enclosure | UL508a Rated |
The STS 6000 P-35 operates on a simple recirculation principle to maintain fuel quality. The system is installed between the fuel storage tank and a dedicated external pump. When activated automatically via a programmed timer, or manually by an operator, the inlet solenoid valve opens. Fuel is drawn from the lowest point of the tank and passes through the system's plumbing. It first enters the primary filter/water separator, which utilizes a coalescing filter element to merge microscopic water droplets into larger ones, allowing them to separate from the fuel and settle at the bottom of the housing.
The fuel then flows through the LG-X 4000 inline magnetic fuel conditioner, which helps stabilize the fuel and improve combustion characteristics. Subsequently, the fuel passes through the secondary fine filters, which capture any remaining particulate matter down to a precise micron rating. After this multi-stage cleaning process, the polished fuel is returned to the storage tank through a separate outlet port, positioned away from the suction line to ensure complete tank turnover. The system continuously monitors pressure levels and flow rates, and automatically shuts down and triggers an alarm if any fault is detected, such as a filter blockage or water accumulation.
The complete system includes a NEMA 3R rated enclosure, a Smart Filtration Controller (SFC80), a primary coalescing filter housing, a secondary fine filter housing, an LG-X 4000 magnetic fuel conditioner, a leak detection float switch, a flow switch, pressure transducers, pressure gauges, and all necessary plumbing components. Filter elements are also included with the standard system.
Filter elements should be inspected regularly and replaced at least every six months under normal operating conditions. However, if the system is used heavily (more than eight hours per day), or if the fuel being polished is heavily contaminated, more frequent replacements may be required. The system's high-pressure alarm will also indicate when filter changes are necessary.
The standard NEMA 3R enclosure provides protection against falling rain, sleet, snow, and external ice formation, making it suitable for most outdoor installations. The optional NEMA 4X enclosure, constructed from stainless steel, offers additional protection against windblown dust, splashing water, hose-directed water, and corrosion, making it ideal for harsh industrial, marine, or coastal environments.
Yes, the system offers an optional Multi-Tank Assembly configuration. This setup includes external ball valves and allows the STS 6000 P-35 to service multiple storage tanks sequentially. The Smart Filtration Controller can be programmed with independent timer schedules for each connected tank, and high-level float switches can be wired in to prevent overfilling.
The optional Auto Water Drain (AWD) system automatically removes collected water from the primary filter housing without manual intervention. When water reaches a high level, the system pauses operation, drains the water to a collection drum, and then resumes normal polishing. This feature reduces maintenance frequency and is particularly useful for unattended or remote installations.
The SFC80 controller includes comprehensive alarm features: Leak Detection (from the drip tray float switch), No Flow (if flow is not detected during operation), High Pressure (if filter differential pressure exceeds set points), High Water (if water is detected in the primary filter), and Tank Overflow (for multi-tank configurations). These alarms trigger a system shutdown and provide local indication, with dry contacts available for remote monitoring.
Our engineers will confirm the correct STS 6000 P-35 configuration for your specific tank size, fuel type, and application requirements. Whether you need a standard system or a custom multi-tank setup with optional Auto Water Drain, we provide full technical documentation and a competitive quote tailored to your operational environment.
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