tender for purified ro plant for upper primary schools under different school of khandaghosh block , purified ro plant for primary schools under different school of khandaghosh block sl. no. component / parameter minimum specification 1 type commercial/institutional ro-based water purification system 2 purification technology multi-stage purification comprising sediment filter + pre-carbon filter + ro membrane + post-carbon/polishing filter + uv/uf, as applicable 3 ro capacity minimum 50 lph purified water production capacity, subject to school requirement 4 ro membrane 4 pc high quality [high-rejection, reputed make, suitable for the raw-water quality prevailing at the school] 5 ro recovery minimum 40-50%, or better, depending on raw-water quality and system design 6 purified water quality suitable for drinking purpose and conforming to applicable bis drinking-water requirements 7 raw water tds system shall be suitable for the prevailing source-water tds; vendor shall assess raw-water quality before installation 8 pre-filtration 3 multi grade filter [multi-grade sediment and activated carbon filtration to protect the ro membrane] 9 uv/uf uv/uf purification stage to be provided after ro, as appropriate to the design 10 cold water storage tank minimum 60-120 litre food-grade quality, depending on capacity and school requirement 11 tank material food-grade, non-toxic and corrosion-resistant 12 pump 2 nos 100 gbd [suitable high-pressure pump of adequate capacity for the ro system] 13 electrical supply 230 v ac, single phase, 50 hz, with suitable protection 14 electrical protection mcb, earthing, overload/short-circuit protection and necessary control arrangement 15 automatic operation automatic start/stop based on raw-water availability and purified-water tank level 16 reject water proper provision for collection/disposal/reuse of ro reject water 17 water dispensing stainless-steel/food-grade drinking-water outlet with suitable tap(s) 18 cabinet/frame durable, corrosion-resistant ms powder-coated/ss frame or cabinet 19 indicators power, purification/system status and tank-level indication, as applicable 20 installation complete installation, testing and commissioning at the school site 21 piping food-grade/upvc/appropriate potable-water-grade piping with all necessary fittings, valves and connections 22 consumables initial set of filters and consumables required for commissioning shall be included 23 water testing raw and purified water shall be tested through an authorized/nabl-accredited laboratory, wherever required 24 warranty minimum 3 year comprehensive warranty from the date of successful commissioning 25 annual maintenance contract provision for post-warranty amc, if required by the department