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|  MIL-S-64052
b.
The spray gun trigger shall not be activated.
The air and liquid material valves shall be closed to prevent the passage
c.
of air and liquid material within the spray gun body.
3.12.2 Air leakage requirement No. 2. When the following pre-conditions have been
fulfilled (see pre-conditions a. to f. below), the spray gun shall not be damaged or
deformed after being subjected to air pressure of not less than 100 psig for not
less than two (2) minutes. When the air pressure supply source is shut off by a
supply line valve adjacent/at the gun to isolate the air pressure captured in the
spray gun and cup assembly, the captured air pressure, 100 psig or more, in the
isolated spray gun and cup assembly shall not drop more than ten (10) psig in not
less than one (1) minute.
Pre-conditions of Air Leakage Requirement No. 2:
a.
Remove the spray gun cup, the material inlet connection shall be capped,
plugged, or blocked to prevent the escape of air through the material
inlet connection.
b.
The spray trigger shall be in a fully activated position.
The air cap shall be capped, plugged, or blocked to prevent the escape of
c.
liquid material through the liquid material exit orifice.
d.
The air cap shall be capped, plugged, or blocked to prevent the escape of
air through the air exit ports.
e.
The air valve shall be open to permit the passage of air through the body
of the spray gun.
f.
The liquid material valve shall be open to permit the passage of liquid
material through the body of the spray gun.
The spray gun shall consist of, but not be limited
3.13 Detail of components.
to, the following components.
3.13.1 Spray gun body. The spray gun body shall be a heavy duty forged aluminum
alloy and shall be free of defects that may affect serviceability or performance,
i.e., fins, scale, inclusions, cold shuts, mismatching, etc. The gun body shall
have a polished exterior surface. A hook shall be provided at the top of the body
for hanging the gun when not in use.
3.13.2 Spray gun cup. A heavy duty one quart capacity, attachable stainless
steel or aluminum alloy body pressure feed spray gun cup shall be provided with each
spray gun, hereafter referred to as the "cup". The cup lid shall include an air
regulator an air regulator adjustment, a fine air flow volume adjustment valve and
an air pressure gage. A pop-off pressure safety relief valve, vented to atmosphere,
shall be mounted on the spray gun cup lid or at the base of the spray gun handle.
The air regulator shall be capable of regulating the air pressure inside the cup
within 5 psig at any point within the full range scale of the cup air pressure gage.
The cup air pressure gage shall display an air pressure range from no less than 0
to 50 psig and no more than 0 to 60 psig. The gage shall be accurate to three (3)
psig throughout its full range, or shall be accurate throughout the full range at
five (5) percent of the mid-scale value. The cup shall have a stainless steel or
aluminum alloy, reinforcing ring permanently attached to exterior bottom of the cup.
This exterior reinforcing ring as defined above, shall continue not less than
0.625 inch up the outside of the cup and may have a circular opening centered on the
6
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