MIL-PRF-52747F(AT)
3.4 Environmental.
3.4.1 Operating conditions. The nozzle shall perform as specified herein during or after
exposure to the following environments (see 4.4.4.8 thru 4.4.4.14).
a. Temperature range:
Type I : -25 to +140°F.
Type II: -60 to +95°F.
b. Relative humidity: Zero to 100 percent.
c. Vibration: Vibration incident to service.
d. Salt spray: Exposure to salt sea atmosphere.
e. Sand and dust:
Type I : Exposure to desert environment.
Type II: Exposure to dusty arctic environment.
f. Shock: No damage when tested as specified in 4.4.4.14.
3.4.2 Storage.
3.4.2.1 Type I nozzle. The nozzle shall not be damaged by storage in any ambient
temperature from -50 to +160 degrees Fahrenheit (°F).
3.4.2.2 Type II nozzle. The nozzle shall not be damaged by storage in any ambient
temperature from -65 to +145°F.
3.5 Maintainability.
3.5.1 Maintenance support. Assemblages or support elements shall be adequate to
perform the intended function of assisting or conducting maintenance operations. Special hand
tools shall be used only when common hand tools cannot be utilized or when they provide
significant advantage over common hand tools (see 4.4.4.17).
3.5.2 Scheduled maintenance. The time required for the operator to accomplish all
scheduled preventative maintenance while wearing clothing appropriate to the operating
environment specified shall not exceed 5 minutes daily (see 4.4.4.17).
3.6 Closed-circuit refueling nozzle. The nozzle shall be equipped with a coupler for
direct connection to a closed-circuit adapter, an internal pressure regulation device, a manually
controlled on-off flow valve, a strainer assembly and a ground cable assembly. The type I nozzle
shall be designed so that one person wearing gloves can easily couple it to a vehicle adapter and
operate it (see 4.4.2). The type II nozzle shall be designed so that one person wearing arctic
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