MTC HC-90 High Capacity Mobile Fuel Polishing System – 10 to 90 GPM VFD-Controlled Skid with Multi-Stage Filtration and Smart Safety Alarms

The MTC HC-90 is a purpose-built high capacity fuel polishing system designed for operations that require fast, thorough cleaning of large diesel and bio-fuel storage tanks. Mounted on a portable skid for straightforward repositioning between tank locations, the system draws fuel through a four-stage cleaning circuit — a bag filter vessel and mechanical water separator for primary bulk decontamination, an inline magnetic fuel conditioner for hydrocarbon stabilisation, and a high-efficiency cartridge fine filter for final particulate and water removal — all managed by the SFC70 Smart Filtration Controller with built-in safety shutdown alarms. With a VFD-adjustable flow rate between 10 and 90 GPM, the MTC HC-90 can be dialled to match each phase of a polishing cycle, from slow initial extraction of free water to full-rate recirculation during Phase 2 bulk cleaning and precision fine filtration in Phase 3. Remote pendant operation, locking 2-inch cam and groove connections, and multi-voltage power compatibility make it an adaptable, field-ready solution for marine, industrial, and standby power fuel maintenance programmes.

• Variable Flow Rate via Integrated VFD Controller — 10 to 90 GPM: Unlike fixed-speed fuel polishing units, the MTC HC-90 incorporates a Variable Frequency Drive controller that allows the operator to adjust the pump's output frequency from 10 Hz to 60 Hz, producing a corresponding flow range from approximately 6.7 GPM to 90 GPM. This adjustability is operationally significant: Phase 1 sludge extraction benefits from a reduced flow rate of 10–20 Hz to prevent agitating settled water and sludge into the fuel before it can be drawn off cleanly, while Phase 2 recirculation and Phase 3 fine filtration can be run at higher throughputs once bulk contamination has been removed. Maximising flow rate during Phase 2 reduces service time on large-volume tanks, and controlled ramp-up through the VFD also protects the pump and system components from hydraulic shock on startup.
• Multi-Stage Fuel Filtration with Selectable Bag and Cartridge Elements: The MTC HC-90 processes diesel and bio-fuel through a cascaded filtration circuit that addresses contamination at each scale of particle size. The primary bag filter vessel accommodates interchangeable filter bags from 1 to 800 microns via a liner basket assembly, enabling the operator to progress from coarser bags during Phase 2 recirculation down to finer micron ratings as tank contamination levels decrease, systematically reducing the burden on the downstream cartridge fine filter. The secondary cartridge fine filter vessel accepts 2–30 micron particulate elements, 10–30 micron water block elements, or 3–10 micron micro-glass elements, providing absolute-rated final filtration to meet specific fuel cleanliness standards required by sensitive injection systems and quality-controlled storage operations.
• FP-90 Mechanical Water Separator for Dedicated Free-Water Removal: The MTC HC-90 includes a dedicated FP-90 mechanical water separator positioned in the fuel circuit between the primary bag filter and the fine filtration stage. Unlike coalescing elements that can be overwhelmed during early-phase polishing of heavily contaminated tanks, the FP-90 mechanically separates free water and settled sludge from the fuel stream, routing it to a drain valve for controlled disposal. An integrated water detection sensor probe monitors accumulation within the separator in real time, and when water reaches the alarm threshold, the SFC70 controller triggers a High Water alarm that shuts the pump down automatically — preventing water-laden fuel from loading or damaging the downstream cartridge fine filter. This dedicated water separation stage substantially extends fine filter element life on tanks carrying high free-water contamination loads.
• LG-X 4000 Inline Magnetic Fuel Conditioner: An LG-X 4000 inline magnetic conditioner is permanently integrated into the MTC HC-90's fuel circuit, treating every litre of fuel as it passes through the system. The magnetic field generated by the conditioner affects the charge distribution of hydrocarbon molecules and ferrous micro-particles within the fuel, reducing their tendency to cluster into larger sludge agglomerates and promoting a more homogeneous fuel condition that supports cleaner combustion and reduced injector and filter fouling rates over time. As a passive device with no moving parts, the LG-X 4000 requires no operator intervention, consumes no power, and adds no maintenance burden — providing continuous fuel conditioning as a standard feature of every polishing cycle without additional cost or complexity.
• SFC70 Smart Filtration Controller with Three-Alarm Safety System: The SFC70 Smart Filtration Controller serves as the operational brain of the MTC HC-90, managing system startup, pump control, operational status indication, and automated safety shutdown across three independent alarm channels. The High Water alarm activates when the water separator sensor probe detects excessive water accumulation, the High Vacuum alarm triggers at 16 inches HG on the suction side to signal primary filter blockage, and the High Pressure alarm fires at 22 PSI on the discharge side when the secondary cartridge filter is approaching saturation. Each alarm halts the pump immediately and requires the operator to service the relevant component before the Alarm Reset button can restore operation — preventing unattended system damage and ensuring that polishing only continues when the circuit is performing within safe operating parameters. A pump control selector switch supports Manual and Remote (pendant) operating modes, and dedicated indicator lights confirm power status, pump run state, and alarm conditions at a glance.
• Remote Pendant Operation for Flexible On-Site Control: The MTC HC-90 includes a remote pendant switch that allows the operator to start and stop the pump from a distance without returning to the system controller mounted on the skid. This feature is particularly valuable when the polishing skid must be positioned at a distance from the tank access point, when the operator needs to monitor the suction hose positioning inside a tank while running the pump, or when the system is deployed in a confined space where continuous proximity to the controller is impractical. With the SFC70 placed in AUTO mode, the remote pendant provides simple one-button pump control while the controller continues to monitor alarms and execute automatic safety shutdowns if any alarm condition is triggered independently of the remote pendant state.
• Portable Skid Design with Locking 2-Inch Cam and Groove Connections: The MTC HC-90 is built on a compact skid platform that consolidates all system components — pump, motor, filters, water separator, fuel conditioner, VFD, controller, and all associated plumbing — into a single moveable unit measuring approximately 59 inches tall, 36 inches wide, and 45 inches deep. The skid design allows the system to be transported via pallet truck, forklift, or crane between tank locations on site, servicing multiple tanks in a single mobilisation. All fluid connections use 2-inch locking cam and groove couplings on both the inlet and outlet ports, providing tool-free, leak-resistant hose connection with the 25-foot clear suction hose and 25-foot discharge hose supplied with the system. The clear suction hose gives the operator a direct visual check of fuel flow quality and pump prime status during operation.
• Fine Filter Bypass Capability for Phased Tank Cleaning: A dedicated bypass mode routes fuel exclusively through the primary bag filter vessel and FP-90 water separator, completely bypassing the secondary fine filter cartridge during Phase 1 and Phase 2 of the polishing cycle. This bypass capability is essential for cost-effective operation on tanks with heavy sludge, free-water, and coarse particulate burdens: engaging the cartridge fine filter immediately on such tanks would cause rapid element loading, excessive filter element consumption, and premature operational pauses for cartridge changes before meaningful tank cleaning has been achieved. By completing the majority of contamination reduction through the lower-cost bag filter and water separator stages before switching to fine filtration mode, the MTC HC-90 protects the investment in precision cartridge elements and significantly reduces per-tank maintenance cost on large or heavily fouled fuel stores.