10
6 Cleaning and Maintenance
6.1 General
Instructions
The combination of pre-filter and activated carbon guarantees a high filtration efficiency of
unhealthy gases, vapors and fumes. The large surface area and small particle size of the actuated
carbon maximizes absorption of polluted air.
6.2 Calculation of the Life Time of the Filter
Whenever adhesive vapors are involved, life expectancy can only be estimated, as the amount of
vapors released depends on temperature, the exposed surface area and the length of time.
Additional contaminant loads in the air being filtered may include oil mist, cigarette smoke, etc.
Never spray directly into the suction tube. Minimum spray distance is 50 cm.
Risk of explosion due to super saturation!
For activators, cleaners and primers, calculation of service life is easy: The filter will be saturated
after extracting vapors from approx. 2.5 to 3.5 liters of solvent. This is equivalent to
approximately 6 spray cans. However, this does not apply for heptane, which the filter will not
adsorb.
For a standard adhesive bonding application, emission of adhesive vapors can be assumed to be
well below 1% of the volume of adhesive used.
This means that filter cartridges would have a
service life covering a consumption period in excess of 100 – 200 liters of adhesive.
As
mentioned before, any contaminant loads, which may exist in the environment, will result in an
additional limitation of filter service life.
Altogether this estimate is in line with the filter
manufacturer's experience saying that the filter cartridges have a life expectancy of 1 to 2 years
maximum.
Combinations of adhesives with heptane based activators and primers - e.g. 770, 7455, 7457, etc.
are an exception. In this case life expectancy is not expected to be reduced, as heptane loading on
the filter is negligible:
Then the filter is clogged and needs to be replaced.
6.3 Disposal
There are two possibilities to dispose the filter 3:
1. The filter has to be disposed according to the valid regional regulations.
2. A replacement filter is available, order code no. see section 8. For the replacement procedure,
call your local Henkel Loctite representative.
