MIL-DTL-23581B(SH)
3.6.16 Lint tray and screen. A lint tray shall be designed with a corrosion resistant lint screen. The screen
mesh size shall be approximately no. 14. The screen shall be installed between the air exhaust flow from the drying
cylinder and the fan. The screen shall be accessible and cleanable from the front of the drying tumbler.
3.7 Performance characteristics.
3.7.1 Drying efficiency. The drying tumbler shall remove moisture from the maximum load capacity soaked
with water to a wet weight of 150 percent of the maximum bone-dry weight at a temperature of 70±2 °F. The drying
tumbler shall remove 95±1 percent of the water from the load with a drying rate of 0.4 pound of water per minute
(see 4.3.3.6).
3.7.2 Inclined operation. The machine shall operate normally up to and including 30 degrees of inclination
when tested as specified in 4.3.3.2.
3.7.3 Vibration. The machine shall operate normally while being subjected to normal vibration levels, both
internally and externally excited when tested as specified in 4.3.3.3. The machine shall be capable of performing its
principle function after testing.
3.7.4 Airborne noise and structureborne vibration. The drying tumbler airborne noise shall be not greater than
the acceptance criteria specified in table I of MIL-STD-740-1 for Grade D equipment. The drying tumbler
structureborne vibratory acceleration shall be not greater than the acceptance criteria specified on figure 2 of MIL-
STD-740-2 for Type III equipment.
3.7.5 Shock (Type I only). Drying tumblers shall meet the Grade B shock requirements of MIL-S-901 when
tested as specified in 4.3.3.5 (see 6.2).
3.8 Finish and color. Exposed surfaces of the drying tumbler shall be painted with a heat resistant paint of a
color and quality normally furnished on the manufacturer's commercial machines.
3.9 Identification plate. An identification plate shall be made of commercial corrosion-resisting steel or brass.
All markings shall be legible.
3.9.1 Mounting. The identification plate shall be securely affixed to each machine in a conspicuous place.
3.9.2 Identification plate data. Data marked on the identification plate shall include the following:
a. Manufacturer's name, type or model number, serial number, contract or order number, and date of
manufacture.
b.
Salient design features including size, speed, voltage, current, and capacity in pounds-dry weight per load.
c.
PIN and National Stock Number (see 6.2).
d. Component identification number (CID). The component identification number entry shall consist of the
letters "CID", followed by a nine (9) digit number, which will be furnished upon receipt of provisioning technical
documentation (PTD). No equipment shall be shipped without the CID number for the drying tumbler, and its
associated components shall also be recorded on the packing list.
3.10 Workmanship. In general, workmanship shall be in accordance with industry practices and shall meet the
following:
a.
Welds are cleaned and ground to present a uniform and smooth finish.
b. All parts are tight and of rigid construction, including housing panels, so that the machine does not vibrate
during operation.
c.
Cylinder both with load and without load does not wobble during operation.
d. Access plates and doors are provided as necessary for proper maintenance, cleaning, and lubrication, and
are of suitable size and properly located.
e.
Controls and door handles are suitably located and hazard free to the operator.
f.
All surfaces, including interior of cylinder, are free from burrs and sharp edges.
g.
Safety guards are configured and located to prevent injury to operating and maintenance personnel.
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