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UDI 12/2019
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Manual
UdiMatic
8 - PREVENTIVE MAINTENANCE & INSPECTIONS
General notes:
1. In case that there is a need to drain the filter completely, perform manual flush before draining the
filter.
2. (__) refers to the breakdown drawings of chapter 9.
3. Before installing seals and O-rings back to their places, apply silicone grease ‘DOW CORNING 4DC’
or equivalent grease (unless otherwise noted)
.
4. Do not tighten / untighten bolts while the filter is pressurized.
Following is a schedule of preventive maintenance and inspections based on average filtration duty, and
should be used as a guideline only. For best results, a maintenance schedule should be compiled based
on experience gained from using the filter. Maintenance kit (paint and grease) is attached to the filter.
8.1 - Daily
Repair any damage to the protective coating of the filter without delay. Prior to application of protective
paint, thoroughly clean the damaged spot with wire brush.
8.2 - Monthly
On units equipped with by-pass valve, the by-pass should be engaged at least once a month. This will
clean the valve seat of any accumulated dirt, as well as ensuring proper by-pass
operation.
8.3 - Quarterly
Depressurize the filter; disconnect the command pipes from the piston.
Dismantle the piston from the filter by unscrewing the piston out. Pull out piston
rod (4) lubricate the piston rod with Dow Corning 4DC or equivalent grease. Push
the piston rod back inside and install the piston back. Bleed the air from the
command pipes until all the air is displaced by water, connect the command
pipes back. Perform start-upprocedure for filter (see par. 4.3).
8.4 - Yearly
Every year lubricate the piston internal parts with lubrication grease. Depressurize the filter and
disconnect the command pipes from the piston. Dismantle the piston from the filter by unscrewing the
piston out.
1. Screw out the bolts (1), and pull the front flange (2) out.
NOTE:
do not unscrew the rear bolts (3)
1
2
3
