MIL-DTL-82068D
3.7.6.2 Valves. All valves shall be of brass with ground metal seats or corrosion-
resistant plastics capable of withstanding vibrations and wear and tear arising from use in this
application. Valves shall be of the type recommended by the manufacturer for the intended use.
3.7.6.3 Pressure gage. A pressure gage, not less than 2.25 inches in diameter, with
clearly readable graduations in increments of not more than 50 psi, from 0 psi to not less than
200 psi over rated maximum pressures, shall be installed in the high pressure section of the
piping system. The pressure gage shall indicate the effective operating pressure in the system.
The pressure gage shall be dampened, or otherwise protected with an air chamber, to provide for
a steady gage reading under all operating conditions.
3.7.7 Gaskets and washers. Gaskets and washers shall be smooth and seamless, and shall
be manufactured from Buna-N nitrile (NBR), neoprene, or similar compressible material, that is
relatively unaffected by pesticide.
3.7.8 Hose reel assembly. Hose reel assemblies, complete with frame, spray gun-holding
device, retraction crank or handwheel, adjustable tension control, brake, not less than 100 feet of
hose, and a spray gun with flow control disks (see 3.7.8.2), shall be furnished with each hose reel
assembly. Hose reel assemblies shall be furnished as follows:
a. Size A and size B - two hose reel assemblies.
b. Size C - one hose reel assembly.
3.7.8.1 Hose. Hose shall be commercial sprayer hose, not less than 0.5 inch in diameter,
with the following characteristics:
a. High pressure.
Inner tube: Smooth seamless oil and chemical-resistant.
Outer tube: Abrasion, sunlight, and weather-resistant.
Reinforcing: Two braids of textile cord.
Performance: Minimum burst - 4 times the operating pressure.
b. Suction hose. Suction hose shall not collapse at a vacuum pressure of -22.7 feet of
water (-20.0 inches of mercury).
3.7.8.2 Spray gun. The spray gun shall have a trigger-type spray shutoff, and a spray
pattern adjustment. At least three hardened stainless steel orifice-type flow control disks that
limit the delivery of pesticide through the spray gun nozzle shall be provided with the spray gun.
All flow control disks shall be interchangeable and clearly marked to identify the degree of flow
control provided. The use of flow control disks shall not distort the effective flow pattern in any
adjustment between mist and solid stream when the pesticide is supplied at the operating
pressure. When supplied with pesticide or water at the operating pressure, the flow control disks
shall limit the discharge through the gun in a solid stream flow pattern as shown in table II:
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