water hardness
31Water of zero hardness — Вода с нулевой жесткостью, полностью деминерализованная вода …
32Carbonate hardness — is the measure of Calcium and Magnesium and other hard ions associated with carbonate (CO32 ) and bicarbonate (HCO3 ) ions contained in a solution, usually water. It is usually expressed either as parts per million (ppm or mg/L), or in degrees… …
33Magnetic water treatment — General Arrangement of MWT Apparatus Magnetic Water treatment[1] usually by the application of a changing Magnetic flux is a proposed method of water softening[2] …
34Cold water pitting of copper tube — occurs in only a minority of installations. Copper water tubes are usually guaranteed by the manufacturer against manufacturing defects for a period of 50 years. The vast majority of copper systems far exceed this time period but a small minority …
35temporary hardness — noun : the portion of the total hardness of water that is removable by boiling whereby the soluble bicarbonates of calcium and magnesium are converted into the corresponding insoluble carbonates and are precipitated distinguished from permanent… …
36Dealkalization of water — The dealkalization of water refers to the removal of alkalinity ions from water. Chloride cycle anion ion exchange dealkalizers remove alkalinity from water. Chloride cycle dealkalizers operate similar to sodium cycle cation water softeners. Like …
37Malvern water — This article is about natural Malvern spring water. For the bottled product, see Malvern Water (bottled water). St. Ann s Well, Great Malvern, a popular café for walkers on the hills. The building on the right houses the spout from which the… …
38Drinking water directive — The European Drinking Water Directive (DWD), Council Directive 98/83/EC concerns the quality of water intended for human consumption and forms part of the regulation of Water supply and sanitation in the European Union. The Directive is intended… …
39Soft water — the term used to describe types of water that contain few or no calcium or magnesium metal cations. The term is usually related to hard water , which does contain significant amounts of these ions.Soft water usually comes from peat or igneous… …
40total hardness of water — suminis vandens kietis statusas T sritis Standartizacija ir metrologija apibrėžtis Vandens karbonatinio ir nekarbonatinio kiečių suma. atitikmenys: angl. total hardness of water vok. Gesamthärte, f rus. общая жесткость воды, f pranc. dureté de… …
