tender for purified ro plant for primary schools under different school of khandaghosh block , purified ro plant for primary schools under different school of khandaghosh block technical specifications sl. no. component / parameter minimum specification type commercial/institutional ro-based water purification system purification technology multi-stage purification comprising sediment filter + pre-carbon filter + ro membrane + post-carbon/polishing filter + uv/uf, as applicable ro capacity minimum 30 lph purified water production capacity, subject to school requirement ro membrane 3 pc high quality [high-rejection, reputed make, suitable for the raw-water quality prevailing at the school] ro recovery minimum 40-50%, or better, depending on raw-water quality and system design purified water quality suitable for drinking purpose and conforming to applicable bis drinking-water requirements raw water tds system shall be suitable for the prevailing source-water tds; vendor shall assess raw-water quality before installation pre-filtration 3 multi grade filter [multi-grade sediment and activated carbon filtration to protect the ro membrane] uv/uf uv/uf purification stage to be provided after ro, as appropriate to the design cold water storage tank minimum 40-80 litre food-grade quality, depending on capacity and school requirement tank material food-grade, non-toxic and corrosion-resistant pump 100 gbd [suitable high-pressure pump of adequate capacity for the ro system] electrical supply 230 v ac, single phase, 50 hz, with suitable protection electrical protection mcb, earthing, overload/short-circuit protection and necessary control arrangement automatic operation automatic start/stop based on raw-water availability and purified-water tank level reject water proper provision for collection/disposal/reuse of ro reject water water dispensing stainless-steel/food-grade drinking-water outlet with suitable tap(s) cabinet/frame durable, corrosion-resistant ms powder-coated/ss frame or cabinet indicators power, purification/system status and tank-level indication, as applicable installation complete installation, testing and commissioning at the school site piping food-grade/upvc/appropriate potable-water-grade piping with all necessary fittings, valves and connections consumables initial set of filters and consumables required for commissioning shall be included water testing raw and purified water shall be tested through an authorized/nabl-accredited laboratory, wherever required warranty minimum 3 year comprehensive warranty from the date of successful commissioning annual maintenance contract provision for post-warranty amc, if required by the department