ARMY TM 10-4610-309-14
MARINE CORPS TM10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
SUPPORTING INFORMATION
REVERSE OSMOSIS % CLEAN CALCULATION
REVERSE OSMOSIS % CLEAN CALCULATION
This work package provides the procedure for calculating the Reverse Osmosis (RO) % Clean Factor.
This factor indicates the water production performance of the TWPS RO membranes relative to the
performance of new, clean membranes. The calculation compares the permeability, or ease of water
flow, through the RO membranes with the permeability of new clean membranes. The result is expressed
as a percentage. For example, a % Clean Factor of 85% means that the RO membranes are performing
at 85% of the new, clean membrane performance. As the % Clean Factor becomes lower, the required
operating pressure increases. Refer to WP 0016 for how to use the % Clean Factor data to determine
the need for RO cleaning and to determine the performance limitations resulting from low % Clean
values.
The data required to perform the calculation is obtained from the Operating Data Log, WP 0080.
0083 00-1
