NPFC - MIL-D-18641
DISTILLATION UNITS, WATER STEAM, OR FLASHED VAPOR OPERATED, OR HOT FRESH WATER HEATED, LOW PRESSURE NAVAL SHIPBOARD
|Publication Date:||30 August 1960|
This specification covers low pressure steam or hot fresh water (heat recovery) heated distillation units for making fresh water from sea water in Naval shipboard installations.
- Distillation units shall be of the following types except as otherwise specified (see 6.1). Any type may be supplied as applicable:
Type I - Submerged tube type, low pressure steam operated Type II - Flash type, low pressure steam operated Type III - Vertical basket type, low pressure steam operated Type IV - Flash type, hot fresh water heated (heat recovery) Type VI - Combination vertical basket and flash type, steam operated Type VII- Submerged tube, hot fresh water heated (heat recovery).
- Distillation units shall be of the following classes, as specified (see 6.1):
Class A - Basically composition 70-30 coppernickel alloy Class B - Basically composition 90-10 coppernickel alloy. Class C - Basically aluminum bronze.