Product Pricing

(You may also use these links to enter the Shopping Cart to place an order or to determine shipping cost) Product

STS 7020 OPT-AWD -- Automatic Water Drain System for STS 7020

Your Price: $2689.00 Product

BRL-HTR200W -- Automatic Water Drain Barrel Heater - 200W - 120V-60Hz

Your Price: $507.00 Product

AWD-BS15 -- Automatic Water Drain Barrel Stand - Ground Mount

Your Price: $263.00 Product

Automated Programmable Tank Cleaning System - STS 7020 - 20 GPM

Your Price: $28327.00

Product Pricing
Optional Products

(You may also use these links to enter the Shopping Cart to place an order or to determine shipping cost) Product

TS4-SS Tank Fluid Sampler, Stainless Steel - 4 oz.

Your Price: $409.00 Product

TS8-SS Tank Fluid Sampler, Stainless Steel - 8 oz.

Your Price: $462.00 Product

TS16-SS Tank Fluid Sampler, Stainless Steel - 16 oz.

Your Price: $543.00 Product

FT-100 Liqui-Cult Fuel Test Kit - Box of 10 bottles

Your Price: $142.50 Product

WE-S31 Water Eliminator Storage Tank Model, Stainless Steel

Your Price: $464.00

STS 7020 20GPM
Automated Fuel Filtration Systems

Ensures Safe & Reliable Emergency Generator Operation.

STS 7020
Fuel Conditioning and Tank Cleaning System

STS7020 20-GPM Automated Systems

Click on Graphic to Enlarge

STS 7020 20 GPM
Programmable Automated
Fuel Filtration Systems

Flow Rates

20 GPM / 1,200 GPH
(75.7 l/m 4,542 l/h)

Tank Size

15,000 to 30,000 gal.
(56,700 to 113,562 liters)

Port Sizes

1 1/2" NPT Suction
1" NPT Discharge

Power **

120V 60Hz 15A
230V/50Hz 15A


TSC-7000 Controller


3/4 HP Spur
Gear Pump


Stainless Steel Lines
& Fittings


+/-520 lbs
(235.9 kg)


41 - 104 deg. F
5 - 40 deg. C

Suction Capability

15 ft vertical or
100 ft horizontal
lift (lines >
1 1/2", primed)

Max. Fluid

5 cST


37" x 60" x 12"
(94 x 152 x 30 cm)

LG-X Model

LG-X 3000

Leak Sensor

Alarm indicator
(system shutdown)

Primary Filter

FP-40 Fuel/Water
Separator Purifier

Secondary Filter

Duel Spin-On Filters - Primary Fine Filter (1 µ,
3 µ, 10 µ, &
25 µ) and
Secondary Water Block
Filter (3 µ & 10 µ)


NEMA 12 (IP55), 13 (IP65),
3R (IP 32), 4 (IP66),
& 4X (IP66) Powder
Coat (Stainless
Steel Enclosure
available as an

Capable **

Configure for one,
two, three or
four tank

Flow Meter

"No Flow" alarm
indicator and
system shutdown
(flow switch)

Not for use with fluids that have a flash point below 100 deg. F (38 deg. C) (e.g. Gasoline, Alcohol, etc.)

** Choose option during checkout (addition cost may apply)

Available Options for
the STS 7020 System

STS 7020 Multi Tank System -- Maintain up to four (4) individual tanks (Choose option in Shopping Cart)

Stainless Steel Enclosure -- 304 Stainless Steel - 37" x 60" x 12" (94 x 152 x 30 cm). (Choose option in the shopping cart)

Cabinet Heater -- In cold climates, system components require heating within the cabinet to function properly and to provide expected service-life. A 400W heater is available for either 110V/60Hz or 230V/50Hz systems. Note the heater does not heat the diesel fuel, only the System components. (Choose the heater option when placing your order in the shopping cart)

Cabinet Color Options -- Cabinet colors come in standard blue. Other colors may be requested. Additional charges may apply.

AWD -- Automatic Water Drain -- The AWD Auto Water Drain System is an optional component available on the STS Series of Programmable Automated Fuel Filtration Systems. The AWD is comprised of a pump and strainer that will automatically remove water collected in the base of the fuel water separator or the final filter when utilizing a coalescing filter element. When the system detects a high water level, a solenoid valve opens and the drain pump discharges the water into a 15 gallon storage tank next to the system (outside the cabinet enclosure). Choose the Auto Water Drain option when placing your order in the shopping cart.

Amber Stack Light -- The Amber Stack Light may be mounted on the top of an enclosure or near the FPS System. When the FPS Controller senses a fault, the system controller shuts off the pump and a signal is sent to the Stack Light and will commence flashing to alert maintenance personnel that the system is in need of attention. A fault that would result in a shut down includes a flow restriction indicating that a fuel filter element needs to be changed, that an accumulation of fluid in the tray has triggered the leak control sensor, or that some other flow problem has occurred and the pump has automatically shut down. The Stack Light is often installed with the Audible Alarm.

Audible Alarm -- The Audible Alarm may be mounted on the outside of an enclosure or near the FPS System. When the FPS Controller senses a fault, the system controller shuts off the pump and a signal is sent to the Audible Alarm sounding an alarm to alert maintenance personnel that the system is in need of attention. A fault that would result in a shut down includes a flow restriction indicating that a fuel filter element needs to be changed, that an accumulation of fluid in the tray has triggered the leak control sensor, or that some other flow problem has occurred and the pump has automatically shut down. The Audible Alarm is often installed with the Amber Stack Light.

STS Extended Warranty -- AXI Standard Warranty provides protection against defects in material and workmanship for a period of one (1) year. AXI offers an extended warranty plan that can extend your coverage for one, two, three, or four additional years. Contact us for additional information.

Other Products that Enhance
the Operation of the
STS 7020 System

AFC-705 Diesel Fuel Catalyst -- A POWERFUL Full Spectrum Additive and tank cleaning agent. It is a unique broad-spectrum fuel additive that provides Superior Diesel Fuel Quality for Engines and Storage Tanks, lowering operating cost, maintenance and downtime.

AFC-710 Diesel Fuel Catalyst -- A unique and powerful Tier 4 compliant broad-spectrum fuel additive concentrate for use in Diesel, Bio-fuels, Gasoline, Kerosene, and HFO.

AFC-805 Diesel Fuel Catalyst -- An effective means of decontaminating and cleaning storage tanks and stabilizing fuel fuel, ideally used for cold weather applications where there is long term fuel storage, such as bulk fuel farms, winterized recreational and work boats, and also smaller engines.

Fluid Tank Sampler -- Obtain samples from larger tanks using the AXI Stainless Steel Tank Samplers, available in 4 oz., 8 oz., and 16 oz. capacities

Fluid Sample Pump & Sample Bottles -- Use this hand pump to obtain samples of fuel. Sample is deposited directly into 4 oz. or 16 oz. bottle for further testing.

Tank Access Ports -- Easily create an access port in your fuel tank for obtaining samples or access for performing tank cleaning and fuel polishing.

Liqui-Cult Fuel Test KitsTest kits are used to detect microbial growth in fluids and determines the type and degree of infestation.

FUELSTAT® Fuel Test Kits -- Fuel Test kits for detecting microbial growth in fluids that can provide in-the-field instant test results.

Desiccant Fuel Tank Breathers -- Unlike tank installations that utilize open vents or conventional breathers, Desiccant Breathers provide a simple yet dependable defense against not only particulate contamination from entering the tank, but also moisture in the air from entering your storage or equipment tanks.

Water Eliminator -- Water Eliminator crystals are water specific and will swell many times their weight in water. Water specific means they will only absorb the water in your tank and will not absorb or adversely affect gasoline, diesel fuel, fuel oil, JP5 or hydraulic oil. Place a Water Eliminator in your fuel tank and monitor at each fill up for accumulated water.

Water Finding Paste -- Use some "Kolor Kut" paste on the end of a stick or a tank measuring rod that reaches through the top fill opening all the way to the bottom of the tank. Kolor Kut paste will show the water level in the tank by changing color where it comes in contact with water, indicating how much water and sludge will need to be removed.

Replacement Filter Options
STS 7020

First Secondary Filter (Fine Particulate Filter)

Second Secondary Filter (Water Block)

STS 7020 Literature

STS 7020 Components

Inside the STS6020-20GPM

Click to Enlarge

1) Fuel Inlet Ball
Valve (From Tank)

13) Secondary Fine Filter

2) Y-Strainer

14) Differential Pressure Switch

3) Mechanical Water Separator FP-40

15) Primary Fine Filter

4) Vacuum Switch

16) AXI Inline LG-X 3000 Conditioner

5) Pump

17) Leak Detector

6) Primary Fine Filter Pressure Switch

18) Water Drain Valve

7) SMART Filtration Controller

19) Auto Water Drain Screen (part of option package)

8) Secondary Fine Filter Pressure Switch

20) Auto Water Drain Motor (part of option package)

9) Fuel Outlet (Discharge)

21) Auto Water Drain (part of option package)

10) Outlet Ball Valve

22) WATECT Water Sensor

11) Flow Switch

23) Fuel Inlet (From Tank)

12) Ventilation Louver

24) Ventilation Louver

STS 7000 Series Advanced Automated Functionality

AXI (formerly ALGAE-X®) STS 7000 Series Fuel Conditioning and Tank Cleaning Systems are programmable, enclosed and operated by Advanced Automated Fuel Filtration and Maintenance Systems that are designed to optimize and maintain diesel fuel indefinitely, and remove water, sludge and contaminants wherever fuel is stored or used. Adding an STS 7000 Series System that meets your requirements and needs will remove particulate, separate water, and condition fuel. The STS 7000 Series offers Modbus, TCP/IP, LAN, touch screen controller, and internet connectivity, with alerts via email or SMS.

This fuel polishing process conditions and stabilizes diesel and bio-fuels, eliminates microbial contamination, and ensures fuel remains clean and dry. To understand the critical importance of having a Fuel Management Plan that includes an AXI STS Series Fuel Conditioner and Tank Cleaning System, review the article on this web site that explains that Most Diesel Engine Failures Originate in the Fuel Tank (the Real Story of Bad Diesel Fuel).

The STS 7000 Series systems are specifically designed for permanent installations outdoors and are self contained within a lockable NEMA standard enclosure. The STS 7000 Series Systems keep your tanks clean and your fuel in "Clear & Bright" pristine condition at all times providing maximum efficiency and minimal emissions. AXI’s patented unique LG-X Fuel Conditioner, included on every STS System, reverses fuel deterioration and removes sedimentation to sub micron levels, preventing clogged filters, extending injection system service life, and reducing smoke, emissions and downtime.

All STS Series 7000 Fuel Conditioning & Tank Cleaning Systems feature:

  • SMART Filtration Controllers

  • Fully Automated & Programmable Operation

  • Maintenance Alerts can be processed through Email and SMS

  • Runtime Totalizer and Alarm History

  • Integration with Facility Monitoring Systems

  • On-Screen Help

  • Modular "Plug & Play" Flexibility

  • Unique Safety and Alarm Features

  • Continuous-Duty Pumps, Viton Seals

  • Leak Detection with Emergency Shut-Down

The STS 6000 Series are designed with a range of safety features that allows for remote and unattended operation. The Filtration Controller features the following:

  • Automatic Alerts

  • Pump Shut Down when Filters Require Service

  • Pump Shut Down when a Leak is Detected Inside Enclosure

  • Alert when High Water is Detected in Fuel Filter/Water Separator Bowl

  • Pump Shut Down when High Vacuum is Detected

  • Pump Shut Down when High Pump Pressure is Detected

  • Pump Shut Down when Low Fuel flow is Detected

  • Controller Memory Backup to Retain Program during Powr Outages

  • External Remote Shutdown Feature

  • Emergency Stop Outside Enclosure

An STS Series Fuel Polishing System is the central component of a Fuel Management Plan. Establishing a fuel management and maintenance protocol must include periodic monitoring and removal of accumulated water from the tank, periodic treatment with an AXI Diesel Fuel Catalyst for tank cleaning, residual water removal, particulate filtration, microbe neutralization, and polishing of the fuel, returning the fuel to its clear and bright appearance, and to a state of optimal performance.

When the Lights Go out ... it is Too Late to Clean Your Tanks.

STS 7020 Series Advanced Functionality

The STS 7020 Fuel Filtration Systems are self contained, stand-alone and fully automated. They recondition and stabilize fuel, eliminate & prevent microbial contamination and remove water, sludge and contaminants from tanks; preserving the integrity of stored fuel, providing reliable power whenever it is needed. The STS 7020 is powered by either 110V 60Hz 15A or 230V 50Hz 15A power.

The STS-7020 Advanced Automated Fuel Conditioning and Tank Cleaning System is designed to optimize and maintain diesel fuel indefinitely. Adding an STS 7020 system to your fuel management program will remove particulate, separate water, and condition the fuel. This innovative process stabilizes diesel and bio-fuels, eliminates microbial contamination, and ensures clean reliable fuel at all times. The STS 7020 is sized for facilities that require single tank fuel storage of 15,000 to 30,000 gallons (56,700 liters to 113,500 liters). The STS 7020, with the optional two tank system will condition fuel and clean four tanks. Actuated ball valves control the suction from, and the return of fuel to each tank automatically.

The principal components are a continuous duty motor with coupled gear pump, a 20 Mesh Nexus Y-Strainer, an AXI FP-40 Fuel Water Separator as the primary filter that will remove particulates as well as free water from the fuel stream, an AXI Fuel Conditioner, secondary filtration consisting of dual spin on filters and an automatically operated, programmable, UL 508A listed AXI Advanced TSC-7000 Touch Screen Smart Filtration Controller. All components and control devices are contained within a fully enclosed, lockable, weatherproof NEMA 12 (IP55) cabinet.

For safe operation the STS 7020 is equipped with alarm indicator and system shutdown when filters need service and is capable of providing maintenance alerts by email and SMS. Additional safety elements include automatic system shut-down and leak detection within the enclosure, water detection in the primary filter, high pump vacuum, high pump pressure, low fuel flow alert or a flow interruption is detected and flow meter with "no flow" alarm indicator and system shutdown (pressure transmitter).


The STS 7020 is ideal for a single fuel storage tank or multiple storage tank installation that is used to support one or more generators at an industrial site, office campus, municipal water or sewer treatment facility, or a remote construction or mining facility that fuels trucks and on-site equipment from a single or multiple tanks. With its own enclosure, the STS systems are well suited for installations that do not have a structure available to protect the circulation system from inclement weather. Also, a regional municipal police, fire, EMS or other service facility that supports more people and equipment and requires a more robust reserve power unit with longer run times between refueling are all ideal applications to the STS 7020. Many facilities well suited to the STS 7020 will have a single generator to provide power for an extended period.

Facilities situate in remote locations, such as mining sites, island resorts, and areas where the quality of incoming fuel may be in question, may use a separate tank as a "quarantine" tank, segregating the incoming fuel from fuel that has been cleaned and polished. After processing the quarantined fuel assuring that it is in peak condition, the fuel would be transferred into a more permanent holding tank. The STS 7020, with its capability of servicing up to four tanks, can be used to treat the quarantined fuel, service as the transfer pump, treating the fuel additionally during the transfer process, and also treating the fuel in the permanent storage tanks periodically to assure the fuel is in optimal condition.

The STS 7020 Fuel Conditioning and Tank Cleaning System is also ideal for facilities that fuel numerous active equipment, such as a truck terminal or material handling facility, such as a ready mix or hot mix asphalt plant. Treating the fuel as it is supplied by a distributor before it is loaded to downstream equipment assures that the main tank as well as the downstream tanks of the equipment are clean and providing fuel in optimal condition.

AXI Fuel Conditioner

The fuel flow first enters the AXI Fuel Conditioner LG-X 3000 immediately upon exiting the Primary Filter. Operating on the principal of induction on the process of combining kinetic and magnetic energy to influence the behavior of electrons, the AXI Fuel Conditioner provides a powerful magnetic field and the flow of fuel provides the kinetic energy.

AXI LG-X 3000 Fuel Conditioner

Click on Graphic
to Enlarge

As fuel deteriorates, clusters of fuel components break down and residue begins to accumulate, resulting in dark, hazy fuel with poor combustibility. The increase in size and mass of the fuel breakdown products lead to clogged filters and the build up of tank sludge. The AXI Fuel Conditioner dissolves the clusters, stabilizes the fuel, and eliminates tank sludge. The results are Clear & Bright Fuel, improved filterability, optimal combustion and clean fuel systems. The process of how the AXI Fuel Conditioner makes clear, bright and more combustible fuel as well as restoring degraded fuel and eliminating the effects of microbial contamination is compelling. As the AXI Fuel Conditioner does not filter the fuel, but treats it as it passes through the unit, there is seldom any reason to suspect that a restriction is in the AXI Fuel Conditioner. But you can remove the face plate, remove the magnet and wipe it off with a shop rag and replace the magnet and face plate. A spare parts kit for the AXI Fuel Conditioner includes a new face panel O-Ring and replacement screws to fasten the face plate.

Primary Filtration

FP40 Water Separator-Purifier

The AXI FP40 Water Separator-Purifier utilizes the principle of centrifugal force to split water, fuel sludge, and particles of dirt from fuels, and separate them so that the waste can be isolated and drained out without the use of filter elements that must be purchased, inventories and consumed. The heavier fluid (water), sludge and particulates are heavier than diesel fuel (water, sludge and particulates have a specific gravity greater than diesel fuel). When spun around inside the cylinder, guided by baffles inside the cylinder, these materials are forced to the outside wall of the cylinder and then drops down along the outside wall of the cylinder to collect at the bottom of the cylinder for removal by opening a valve and depositing these contaminants into a container for proper disposal.

A major benefit of the FP40 Water Separator-Purifier is that it does not utilize a filter element in the process of removing particulates, sludge and water from the diesel fuel, thereby not requiring the changing of a filter element or incurring the associated cost with purchasing or inventorying replacement filter elements.

A water sensor is fitted to the Separator-Purifier to alert to the accumulation of a sufficient amount of water requiring removal. An operator can then drain the water from the system via the tap in the bottom. The sensor is available in either 9V DC power, or 12-24v DC Hard Wired.

An optional Automatic Water Drain System is available that would be activated by a WATECT water sensor connected to the Fuel/Water Separator and Purifier to allow for automated drainage of water and sludge into a proper container without a full shutdown event. An in-line strainer is incorporated to protect the water removal pump. A 15-gallon waste water drum with removable lid and EPDM gasket is included. The drum is made of translucent 3/16" polyethylene to show the level of waste water in the drum. A water level float switch is installed in the drum to assure the waste water drum does not over-fill. An optional heater is available for the water drum to prevent water freezing in colder temperatures.

A connection on the fitting between the Water Separator-Purifier and the main system Pump is used for the vacuum switch. Should the system lose vacuum for any reason, the system will shut down.

Secondary Filtration

FF-3 Filter Element

The STS 6020 Secondary Filter utilizes two spin-on filters, one filter operating with a fine filtration element capable of removing particulates down to 1 micron, and a second filter utilizing a Water Block filter elements for removal of free and emulsified water. The filter housing includes two pressure switches, one on each filter head, that reads the back pressure and, when the back pressure increases indicating that the flow of fuel is being restricted by the accumulation of particulates or other debris on the filter element inside the spin-on filters, it is time to change the filter. In addition, a Differential Pressure Switch is used to monitor the different pressure between the two filters. This assures that you are not leaving a filter on too long, compromising the filtration process, or changing the filter too soon and not receiving all the value for the filter and increasing your operating costs. No more guessing or changing the filter too soon.

For most applications where fuel is stored for future use in equipment, a circulation system that consistently maintains water-free fuel storage and fuel filtered to a particulate level of 10 microns is considered acceptable. Emergency power generator installations generally utilize secondary filtration to 3 micron, with more critical applications using 1 micron filtration. AXI offers seven different filters for the STS 7020. The fine filter spin-on filter elements are rated at 1, 3, 10, 25 and a 3 micron filter that is an X-Glass element. Also offered are 3 and 10 micron Water Block Filter elements. (see pricing at the links in the table to the left under "Replacement Filter Elements for the STS 7020 System".

The 3 micron Water Block filter is usually the preferred filter for ongoing preventative maintenance. The WB3 filter element will remove free water and emulsified water from the fuel stream along with the removal of particulates. Most engine manufacturers want the fuel entering their engine to be filtered at 4 microns, removing particulates and organic debris from the fuel preventing these contaminants from causing problems with the tolerances of fuel injector systems. Although modern engines have a factory-provided filter, usually in the 4 micron range, supplying fuel to the filter that already meets these requirements will extend the life of the factory filter and also assure the fuel is in optimal condition for use in these highly developed injector systems.

A Vacuum Gauge is provided on the top of the Secondary Filter housing to allow for visual monitoring of Vacuum. When the Vacuum reading increases, indicating that the replaceable filter element has reached its capacity for holding particulate material, you know the filter needs changing. No more guessing or changing the filter too soon.

Smart Filtration Controller

The STS 7000 Series is equipped with the UL508A TSC-7000 Touch-Screen Controller that features advanced connectivity for more intuitive system setup and monitoring from remote locations. The TSC-7000 Series Controller is an HMI PLC UL508A controller with Modbus, TCP/IP, LAN and Internet connectivity for more intuitive system setup and monitoring from remote locations.

TSC 7000 Advanced System Controller

From the home screen you are able to access the different menus (Alarm History, Timer Configuration, Manual Control, Alarms, Filter Configuration, and Help). The Alarms menu is able to access the active alarms that are currently triggered. You are able to see in a more detailed explanation of what alarm is triggered. In the Manual Control menu you are able to change between which tanks you are wanting to polish with a multi-tank system. In the Configuration menu you are able to access IP setup and the menu to clear your Alarm History. The Alarm History menu is where you find a log of all the past alarms that were triggered.

Water Level Probes are provided on the Primary Filter bowl to sense when the water level in the bowl reaches a critical level. The WATECT Water Sensor is monitored by the Controller and will provide an alert when the water level is too high. Upon receiving an alert, the water may be manually drained. An Automatic Water Drain is available as an option to automatically discharge the accumulated water from the Primary Filter bowl into a holding container for later disposal.

As clean fuel leaves the Primary Filter via the outlet port and passes through the Vacuum Switch connected to the Controller, constantly monitoring vacuum and, upon detection of high vacuum, caused by a clogged Primary Filter or obstruction in the suction line, the Controller will send an alert that high vacuum is occurring, and likely the filter requires attention. The fuel then continues to the suction side of the Internal Gear Pump. Fuel then exits the pressure port of the pump and passes through a Pressure Switch with Gauge that allows for both visual reading of the pressure in the discharge side of the pump and monitoring of the discharge pressure by the Controller. If discharge pressure is too high, an alert will shut down the system. This typically indicates a clogged Secondary Filter or obstruction in the discharge pipe.

Leak Detection by way of a float switch in the bottom of the drip tray should the unexpected happen and fuel collects in the tray. Upon detection, the Controller will shut down the system.

Optional Water Removal

The STS 7000 Series Fuel Maintenance Systems may be ordered with the optional Auto Water Drain ("AWD") that automatically removes collected water from a system water separator. The AWD is comprised of a DC gear pump, solenoid shut off valve, and strainer that will automatically remove water collected in the sump of the water separator when the system detects high water levels. The water is drained into a storage tank, external to the system. See the Specification Sheet available for review in the Literature section on the left side of this page.

Up to Four-Tank Optional Installation

The Multiple Tank option for the STS-7020 is designed to allow for multiple fuel tanks to tie into a single fuel polishing unit. By integrating actuators that control the source of fuel being fed into, out of, or through the unit, controlled by an automated customer selected control sequence. The Multi-Tank Option, from two to four tanks, may be chosen in the on-line shopping cart to order or just to see pricing information. For fuel systems requiring the maintenance of more than four fuel tanks, contact us for a custom engineered solution.

Recommended Tank Cleaning & Fuel Treatments

AFC-705 Diesel Fuel Additive

It is recommended that diesel fuel be treated with the AXI Fuel Catalyst AFC-705 (for pre-2007 engines) or AFC-710 (Tier 4 compliant) Diesel Fuel Catalyst prior to the initial tank cleaning and at least every six months thereafter to assure the fuel tank remains clean and the fuel is stabilized. This will enhance and accelerate the tank cleaning process by breaking down and dissolving existing tank sludge. Always check the fuel tank for an accumulation of water in the bottom of the tank. Using a rod, sometimes used to measure fuel in a storage tank, or a length of PVC pipe, spread a line of Kolor Kut Water Finding Paste on the side of the rod or pipe and insert to the bottom of the tank. If the paste touches water, it will change colors, showing how much water is in the tank requiring removal.

AFC-710 Diesel Fuel Additive

Pump accumulated water out of the tank for proper disposal. It is often the case that all of the water is impossible to remove. AFC-705 contains a surfactant that will emulsify the residual water up into the fuel for removal by a Water Block Filter on the AXI Fuel Polishing System AFC-710 does not include this surfactant component). Depending on the condition of the fuel and the amount of sludge build-up, it is recommended to initially use a double dose of one to twenty-five hundred (1:2500 - one oz. to 20 gallons of fuel) and circulate the capacity of the tank five times. Always treat the tank when the tank is full of fuel. If you perform a treatment with a half tank of fuel, you will only be cleaning the bottom half of the tank. The use of AXI Fuel Catalyst has proven to be essential in accelerating the tank cleaning process. AFC-705 and 710 contains detergent, dispersant, corrosion inhibitor, lubricity enhancer and combustion catalyst. AXI Additives do not contain biocides.

AFC-710 Powder Diesel Fuel Additive

For engines manufactured in 2007 and later, use AFC-710, available in both liquid and powdered form. AFC-710 does not contain the surfactant (used to emulsify residual water into the fuel for removal in the circulation process as does AFC-705), a component that does not allow for qualification as a Tier 4 product. AFC-705 and AFC-710 should always be used periodically in particular to stabilize fuel that is stored for longer periods of time.

After the initial cleaning, the AFC-705 or AFC-710 in the fuel will continue to stabilize the fuel for six months or more. Every six months, or more often if the region in which you reside is a humid climate, treat the fuel again and circulate the capacity of the tank three times. In applications where fuel from a treated tank is distributed to other equipment, the additive will also clean the downstream tanks and continue to stabilize the fuel.

AFC-710 Powder

Tank Cleaning & Fuel Treatment for Cold Weather Use

For cold weather operations, AXI Fuel Catalyst AFC-805 is a unique and powerful anti-gelling broad-spectrum fuel additive specifically formulated for use in Diesel, Bio-fuels, Gasoline, Kerosene, and HFO. AFC-805 should be used as part of any preventative fuel maintenance program, and is ideal for use in bulk storage fuel tanks in cold weather environments. AFC-805 enhances the breakdown and removal of sludge, slime, and bio-fouling from tank walls and baffles that are difficult to access.

AFC-805 effectively decontaminates and cleans an engine’s entire fuel and injection system. It continues to work in storage tanks cleaning and stabilizing fuel for up to 12 months with a single dose. AFC-805 is ideally used for cold weather applications where there is long term fuel storage, such as bulk fuel farms, winterized recreational and work boats, and also smaller engines. AFC-805 is recommended at a ratio of 1:5000 (one oz of AFC-805 to 40 gallons of fuel)

The Following Guides
Tell the Story

Fuel Management System Operation

The fuel you depend on should always be in optimal condition. Periodic circulation of fuel assures optimal combustibility and fuel cleanliness. All major diesel engine manufacturers have set minimum fuel standards for the diesel fuel to be used in their engines, and failing to maintain fuel that meets those standards could lead to engine component failures and denied warranty claims. As an example, Caterpillar has published "Cat Commercial Diesel Engine Fluids Recommendations" (SEBU6251-17 September 2014 [a more recent version may be available]) that states "In order to meet expected fuel system component life, 4 micron(c) absolute or less secondary fuel filtration is required for all Cat diesel engines that are equipped with common-rail fuel systems." (Page 34) You should not assume that fuel being delivered to you meets the engine manufacturer’s requirements, and certainly fuel that has been in your storage tank for an extended period of time is unlikely to meet requirements of diesel engine manufacturers without a Fuel Management Program.

Cleanliness standards for diesel fuel, established in the late 1990’s by the International Organization for Standardization (ISO), apply to diesel fuel. Caterpillar recommends that the fuel dispensed into the machine tank meets "ISO 18/16/13" cleanliness level." (Page 49) For more information on fuel cleanliness specifications and what those requirements mean to you, review the "Diesel Fuel & Injector Failure" web page on this site.

Continued vigilance to assure that your fuel is in the best condition possible and always meets the requirements to maintain engine manufacturer's warranty requirements is a major challenge without the use of an AXI Fuel Conditioning & Tank Cleaning System to address the need for periodic Fuel Polishing.

Fuel Maintenance Plans

Clogged Fuel Filter

A Fuel Maintenance Plan should be a part of every periodic engine Preventative Maintenance Program. Preventative Maintenance Programs are common in all major industries today, but monitoring the fuel condition is often taken for granted and not included in the Preventative Maintenance Program. Many of today's maintenance personnel have many years of experience, but until changes in sulfur content in diesel fuel were regulated within the past decade, and with the government’s push for blending some amount of bio-diesel into regular diesel fuel, maintenance professionals were never presented with the problems that we are experiencing today. With today’s advances in design and engineering of diesel engines, especially the new fuel injection systems, and with more emphasis being placed on critical requirements that equipment have longer life cycles and near 100% uptime, fuel management can no longer be ignored. It is now just as important as changing the oil, ensuring the batteries are charged, and the air filter is clean.

Service Agreements with an outside contract company to perform Preventative Maintenance typically do not cover fuel-related management and monitoring unless specified. In-house maintenance personnel are usually pressed for time, and fuel management can be easily glossed over. Fuel has a limited shelf-life and even "fresh fuel" could contain water, sediment, microbes, asphaltene agglomeration, or other contaminate components upon delivery and cause immediate engine performance issues.

Emergency power installations are especially susceptible to unexpected interruptions due to fuel related issues. Periodic generator tests-runs are too short to determine if fuel quality is adequate for the demands of continuous, full-load operation. In fact, generator test runs have been found to significantly accelerate the fuel polymerization and degradation process, resulting in the accumulation of gums and resins in the fuel system, by returning fuel that has been compromised by heat and pressure back to the tank. Thirty minute tests, often performed every month, create the environment in the tank for problems to grow. After extended periods of testing, sometimes years, without having been subjected to an extended full load, operation is interrupted by clogged filters when the lights go out.

Now that you have decided to institute a Fuel Management Plan for your operations, there is work to do. Consider the following as the basis for your Fuel Management Program to further assure that your equipment will run when it is needed most at it’s peak level of performance and repair costs will remain under control:

  • Place in service an AXI Fuel Treatment & Tank Cleaning System appropriate to your operations that are capable of performing a complete tank cleaning and fuel conditioning on each fuel tank in service at least once per year (more often in regions of high humidity). Evaluate what other aspects of fuel monitoring and testing is needed to assure that critical equipment needs, including down-stream equipment, may need to be included in your Fuel Management Plan.

  • Use AXI Broad Spectrum Fuel Catalyst Ultra Concentrate AFC-705 or AFC-710 every six months to enhance the breakdown and removal of sludge, slime, gums, resin, and bio-film from tank walls and baffles that are difficult to access and normal fluid flow does not break loose. Having this unique fuel additive present when fueling downstream equipment also assures that these downstream tanks are being cleaned in the normal course of operations (although separate water removal will be necessary).

  • Periodically (every 30 to 60 days, depending on your climate) use a Fluid Sampler or a hand Fuel Sample Pump to take samples of your fuel from each storage tank and critical equipment fuel tanks for in-house testing for acidity (pH) and use Liqui-Cult Fuel Test Kits to perform testing for microbial contamination. If initial tests indicate fuel problems, utilize laboratory analysis to evaluate the condition of your fuel to assure your fuel supplier is providing fuel that meets the specification of the engine manufacturer you depend on to keep your equipment running.

  • If the quality of your fuel is suspect, consider establishing a quarantine tank to accept new shipments (do not add new shipments of fuel to your stored fuel that has been de-watered and to which you have performed fuel polishing, and is known to meet your Fuel Management protocols).

  • Use Kolor Kut Water Finding Paste at least every 30 to 60-days to monitor the accumulation of water in your storage and equipment fuel tanks due to condensation or from fuel fills. If any amount of water is detected, take steps to remove it.

  • Install Desiccant Breathers on all your fuel storage tanks to help prevent moisture from entering your tanks through the vent as fuel is consumed.

  • Use Water Eliminators in each storage and equipment fuel tank to capture water and remove it before it can cause problems with engine operations or seasonally prevent water from freezing in fuel lines?

With only moderate effort, you can be assured that your diesel fuel will provide optimal performance and enjoy the expected life of your engine’s fuel filters, fuel system components, and your substantial investment in the diesel engine.