MIL-PRF-2939G
dimensions, width, and depth dimensions shall be in accordance with table III.
3.13.6
Air tightness. The cooling coil, when connected to ductwork, shall
be airtight when subjected to an air pressure of 4 inches water gauge within
the duct system.
3.13.7
Water Tightness. Cooling coils shall not leak water.
3.13.8
Air distribution. The outlet air flow of the cooling coil shall be
uniform across the face of the coil shown on table III.
3.13.9
Water flow. Water flow in tubes or other flow devices shall be
turbulent throughout its performance range. Turbuspirals or other devices may
be used to achieve this requirement. If turbuspirals are used they shall have a
uniform pitch of at least 16 turns per linear foot of tube and shall fit
securely against the inside surface of each tube.
8
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