TM 10-4610-232-12
SECTION Il. DEFINITION OF UNUSUAL TERMS
Accumulator — A device to reduce pressure surges caused by the high pressure pump (a vibration dampner).
AG media — Lightweight filter material turning the top media layer in the media filter
Backwash — Semi-automatic process of cleaning the media filter.
Brackish water — Slightly salty water such as that found where a river enters the ocean and the outlet of a bed or
lagoon flooded by ocean tides.
Brine — Very salty rejected feedwater. Also called waste, concentrate, and reject.
Biological warfare agents — These are removed in the carbon filter of the NBC system.
Calcium/carbonate — (Lime) A typeof dissolved salt found in the raw water which may form scale on the reverse
osmosis elements.
Calcium hypochlorite — A form of chlorine used to control biological growth in water.
Calcium sulfate — A type of dissolved salt found in the raw water which may form scale on the reverse osmosis
elements.
Chlorination — The addition of chlorine to product water to prevent growth of micro organisms.
Concentrate – See “brine “
Conductivity – Salinity or amount of salt in solution.
Contaminants — Any foreign substance found in the raw water or in the ROWPU systems.
Creep – Gradual increase in outlet pressure.
Cuvette — Glass test tubes that are matched exactly in all dimensions. Cuvettes must not be scratchedor get dirty
or results from chemical analyses will be Inaccurate.
Cyclone separators – Devices which remove solids from a Iiquid through centrifugal action The Iiquid iS rotated
at high speed by its own velocity forcing the heavier solids out of the Iiquid.
Deionizer – A device for removing any remaining nuclear radiation in the product water The deionizer IS part of
the NBC filtration system.
Differential pressure – The difference between inlet and outlet pressures of a component Also called pressure
drop.
Dissolved solids – Solid substances that must be removed from the raw water during purification.
Electro Magnetic Pulse (EMP) – The electrical and magnetic pulse wave generated by a nuclear weapon.
Feed water – Water input to the Water Purificationn System of the ROWPU.
Free chlorine level – Amount of chlorine present in product water, measured in ppm or mg I.
Fouling – The deposit of solids on the surface of the reverse osmosis (RO) elements Fouling is caused by
dissolved solids or biological growth.
Glossary 3
