Loading ...
Loading ...
Loading ...
FDL (E2.1) 02/2019 page 12/76
1.9 Important points to consider before commissioning
1.9.1 Technical ventilation / permissible load
For safety reasons, the formation of a dangerous, explosive atmosphere must be avoided in all operating
modes (see GUV-R 500 chap. 2.28 “Betreiben von Trocknern für Beschichtungsstoffe” ("Dryers for coat-
ing materials")). Keeping the maximum permissible amount of solvent when loading the chamber will meet
this requirement. The permissible quantity can be calculated according to the "principles for the calculation
of ventilation of chamber dryers and continuous dryers" (EN 1539:2015, Appendix B). According to this
standard, the safety drying oven’s technical data (chap. 17.3) must be included in the calculation, and it is
required to set up a set of loading instructions (for Germany).
1.9.2 Loading instructions
The loading instructions should specify the amount of material, which can be loaded into the safety drying
oven for treatment without any risk of creating a dangerous, explosive atmosphere. GUV-R 500 chap.
2.28 “Betreiben von Trocknern für Beschichtungsstoffe” ("Dryers for coating materials") explicitly states
that the operator must set up a set of loading instructions (for Germany).
1.9.3 Drying nitro-cellulose lacquers
When using the safety drying oven FDL to dry material, which is coated with nitro-cellulose lacquers, the
temperature safety device must be set to max. 130 °C / 266 °F, so that the surface temperature of the
goods to be dried is ensured not to exceed 130 °C / 266 °F. Deviations are only permissible if a report
from a testing agency, which is recognized by the employer's liability insurance association, has declared
safe a higher surface temperature.
1.9.4 Drying mould varnishes
When using the safety drying oven FDL to dry mould varnishes, the operator is allowed to increase the
highest permissible amount of solvent specified for surface drying (chap. 2.3) by up to 10 times (see GUV-
R 500 chap. 2.28 “Betreiben von Trocknern für Beschichtungsstoffe” ("Dryers for coating materials") or EN
1539:2015, Appendix A.1.2).
1.9.5 Drying impregnating resins
When using the safety drying oven FDL to dry impregnating resins, the operator is allowed to increase the
highest permissible amount of solvent specified for surface drying (chap. 2.3) by up to 20 times (see GUV-
R 500 chap. 2.28 “Betreiben von Trocknern für Beschichtungsstoffe” ("Dryers for coating materials") no.
3.7.4 or EN 1539:2015, Appendix A.1.2).
Loading ...
Loading ...
Loading ...