Process D-2, oven

TM 38-260

(d) Whenever air flow is restricted or contains oil and foreign material, the filters should be cleaned or replaced.

(e) Moisture traps should be provided for each outlet or group of outlets. The traps should be located in the air

line as close as possible to the outlet.

(f) The presence of moisture in compressed air may be readily detected by observing a polished metal part for

condensation when the air is blown on the part.

(g) Whenever the presence of moisture is found in a moisture trap, it should be drained and oven-dried or

replaced.

CAUTION

CARE MUST BE EXERCISED IN THE USE OF COMPRESSED AIR FOR DRYING, SO THAT NO

DAMAGE RESULTS FRONT ITS USE. FOR EXAMPLE, TAPED WINDINGS OF ELECTRIC MOTORS

ARE SUSCEPTIBLE TO DAMAGE IF AIR IS DIRECTED IN A MANNER THAT WILL LIFT OR

DISLODGE THE TAPE OR INSULATION FROM THE ENDINGS.

(2) Process D-2, oven. Oven drying shall be accomplished by exposing item(s) to heated air within a properly

ventilated and temperature controlled oven.

(a) All pockets of trapped cleaning solutions must be drained from parts before they are placed in ovens.

(b) In most situations, the oven temperature should be maintained between 270 and 350 F (132 and 176 C).

Lower temperatures should be used to dry parts which may be damaged by heat. Lower oven temperatures may also be

used when drying is used merely to speed the evaporation of solvents.

becoming saturated with water or solvent vapors. The ventilation system should be provided with an approved type of

fire protection system.

(d) Drying times may vary according to the amount of residual water or solvent, the mass of the part, and the

oven temperature.

(e) After oven drying, it may be necessary to cool the parts before further processing.

(f) To ensure complete removal of all possible moisture, oven drying may be used to further dry parts on which

compressed air has been used.

(g) Oven drying is suitable for drying items such as tooling, certain types of gages, and accessories.

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