Axi MTC-X, Instruction, Operating And Maintenance Manual

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System Operation
Operational Modes
The MTC-X system has two modes of operation: Bypass Mode and Fine Filtration Mode (Figure 2.1).
Bypass Mode:
Bypass Mode is an important step in the fuel polishing process. This will remove any large contaminants and any additional
free water from the fuel. This process should be performed until the majority of large contaminants are removed. In Bypass
Mode, the fuel enters the MTC-X inlet hose and moves through the pre-filter (bag filter). After leaving the pump, the fuel
encounters the diverter ball valve. For Bypass Mode, the diverter ball valve should be in position 1. This allows the fuel to
bypass the fine filtration plumbing and continue out the MTC-X outlet hose (path shown by blue arrows in Figure 2.1).
Fine Filtration Mode:
After pre-filtration, Fine Filtration Mode is typically the last procedure in the fuel polishing process to bring fuel cleanliness to
an acceptable level. This mode of filtration will continue to use the pre-filter (bag filter), but will direct the fuel through the fine
filtration spin-on filter(s). In this mode, the user has the option to use a single spin-on filter and void a filter, or two spin-on
filters in series (see Figure 2.1). Filter configurations are shown in the “Filter Configurations” section.
Note: Never restrict the flow on the suction side of an MTC; e.g. by using a smaller ID hose or pipe or attaching the suction
hose to a fitting on the tank that has a smaller ID than the hose. This will lead to excessive pump load, noise, and will
ultimately damage the pump.
Operating Procedure
Phase 1:
AXI recommends Three phases to successfully polish a fuel tank. This will ensure all water is removed from the fuel,
particulate is removed, and the fuel is in an optimal condition. The goal of the first phase is to remove any free water and
sludge on the bottom of the tank without mixing the water into an emulsified state within the fuel.
MTC-X plumbing showing diverter valve position and fuel flow path.
Blue arrows demonstrate Bypass Mode. Red arrows demonstrate
Fine Filtration Mode. Note: Items have been removed for clarity.
Figure 2.1-
Position #2
(Fine Filtration Mode)
Position #1
(Bypass Mode)
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