tender for supply of chemicals and instruments for 4.5 mgd laboratory under zone no. 05 , laboratory water purification system type-2 grade water purification system the unit should purify water byreverse osmosis (ro) and electrochemical deionization (edi) process should comprise pretreatment cartridge, ro module &edi module. • system should able to handle feed water with following specifications • conductivity : up to 2000 μs/cm • free chlorine : up to 3 ppm • silt density index / fouling index : up to 12 • the pre-treatment cartridge should consist of activated carbon with silver impregnation, anti-scaling compound, and a 0.5 μmdepth filter to remove chlorine, oxidation agents, scalants and particles from the feed water. • ro module should consist of suitable polyamide ro membrane with rejection efficiency of 94% or higher, cut-off limit of ~200 daltons with provisions of automatic back flushing with ro permeate water. • system should have conductivity measurement before and after ro membrane for measurement & display of percentage rejection. • should have a protection valve after ro to prevent water from entering edi in case of ro malfunction. • there should be provision for either softener cartridge or any other inbuilt mechanism in edi stack to prevent scale formation at cathode. • the edi stackshould consist of self-regenerating electro- deionization resin for removal of ions and organics from ro water. • output water from the unit should be type-2 grade water with following technical specifications • typical resistivity :5 mω.cm • typical conductivity: ()0.2 μs/cm • flow rate of output water ≥3 liters/hr. • the unit should have a display for coductivity of input and output water, rejection rate monitor, tank level, temperature type-2 water storage tank : • the tank should have a storage capacity of 50 l or comptiable with complete housing and tubing. • should have a tap for dispensing type 2 water. system information : 1. dimensions (h x w x d) mm h 470 x w 268 x d 339: (18.50 x 10.55 x 13.55 in 2. net weight 12.3-14kg (32.95-37.51 lb) 3. operating weight 17.218.5kg (46.8-49.57 lb) 4. electrical feed voltage 100-230 v +/- 10% 5. electrical feed frequency 50-60 hz 6. tap (feed) water connection 1/2 gaz m 7. tap (feed) water pressure 0.5-6 bar 8.product flow rate : +/- 15%, 7 to 35 deg cel : 3 l/b , murexide (ammonium purpurate) cat no- 1.06161.0005, pk -5 gm, make - siscochem/glaxo/merck , ammonia buffer solution 500 ml cat. no. 61759205001730, hsn code 28334000 make - siscochem/glaxo/merck, packing 500ml , sulfuric acid 0.02n solution (n/50) cat no-61846305001730, pk-500 ml, make - siscochem/glaxo/merck , campact dry ready to use media petri plates for testing of e-coil and colifoam make- tasha/himedia/supelco , sodium hydroxide pellets sq 500 gm make - siscochem/glaxo/merck , methyl orange indicator solution 250 ml make - siscochem/glaxo/merck , universal indicator (ph) 100 ml make siscochem/glaxo/merck , erichrome black -t 25gm make siscochem/glaxo/merck , edta solution n/50 make siscochem/glaxo/merck , 100 ntu (turbidity calibration standard formazin) , phenolphthalein indicator make - siscochem/glaxo/merck , sample bottle (jerry can plastic) 1 lit analysis solution (make siscochem/glaso/merck) , ice box 21 lit with handle , ph buffer tablets 4.0 ph , ph buffer tablets 7.0 ph , ph buffer tablets 9.0 ph , tissue paper , silver nitrate n/50 (0.02n) volumetric , potassium chromate indicator make siscochem/glaxo/merck , extran® ma 02 neutral labolene cat no- 60755350001730, pk- 5 lit , make - merck