Supply, delivery and installation of Fast-Moving Spares of MTU-10 under Eastern Mechanical Division, P.H.E. Dte. in the Dist.- 24Pgs(N).

Amount

Supply, delivery at site of Membrane element for RO unit, Capacity 2000 lit/hr. Suitable for installation in RO vessel diameter 8 " & length 40". as per following specification:- a)Permeate Flow: - Minimum 12000 gpd (3.75 m³ /d) b) salt Rejection :- (99.5% minimum) c) Configuration : - Spiral wound d) Membrane polymer:- Composite Polyamide e) Nominal membrane Area:- Minimum 365ft² (33.9m²) f) Maximum applied pressure:- above 450 psi g) Maximum operation temperature :- Not above 122°F (50°C) h) pH range, continuous (Cleaning) :- 2-11 (1-13)* i) Maximum Feed water Turbidity :- Upto 1.0 NTU j) Maximum Feed water SDI (15 mins) :- Upto 5.0 k) Maximum Feed Flow:- 75 GPM (17.0 m³ /h ) l) Minimum Ratio of Concentrate to permeate Flow any Element:- 5.1 m) Maximum pressure drop for Each Element:-10 psi (Make- Hydranautics /Dow/Toray/GE/Any other approved make.

Supply, delivery of UF unit for removing all undisclosed impurities including suspended solids, colidall impurities having Feed Pressure-5 Bar, Operating Tran membrane Pressure -2 psig, Maximum Backwash- 20 psig as per following specification: a) Filtrate Flow- 12.1-29.5 gpm 2.7-6.7m³/hr) b) Filtrate Turbidity-≥00.7 NTU c)Virus removal-≥ 4 log d) Bacteria removal-≥ 4 log e) Configaration :- Capillary Ultrarafitration Module f) Membrane Polymar:- Hydrophilic Poly thersulfone g) Nominal Membrance Area :- 500 ft²(46m² ) or above h) Fiber Dimensions- ID 0.031" (0.8mm) OD 0.055" (1.4mm) i) Pore size:- 0.02 micron or less j) Typical Filtrate Flux Range:- 35-85 gfd (59 145l/m²/h) k) Maximum Applied Feed Pressure. 73 psig (5bar) l) Maximum Transmenibrane Pressure - 20psig (1.4 bar) m) Maximum backwash transtnembrance Pressure :- 20 usig (1.4 bar) n) Instantaneous Chlorine Tolerance :- 200 ppm** p) maximum chlorine Expossure :-200.000ppm-hrs q) maximum instantaneous Feed Turbidity :- 100 NTU r) Maximum Operating Temperature:- 104° F s) pH operatin range:- 4.0-10.0 t) Clraning pH Range- 1.5-13.0

u) Operating Mode:- Inside to Outside Filtration Direct flow of Crossflow. v) Backwash flux-100-150 gfd (170-255 l/m²/hr) w) Backwash Duration -30-60 seconds. x) Backwash Frequency-20-60 minutes. y) Chemical Enhanced Backwash Frequrncy-0-4 ties per day z) Chemical Enhanced Backwash Duration-1-30 minutes z1) Disinfection Chemicals -Na0CL, H₂o₂, CLO₂, or , NH₂CL z2) Cleani9ng Chemicals -NaOH, HCL, H₂SO₄, or Citric Acid (Make - Hydranautics/Dow/Toray/IMT/any other approved make)

Installation and Commissioning of RO unit. Capacity 2000 lit/hr. suitable for RO vesel dameter 8" & length with through checking & testing complete.

Installation and Commissioning of UF unit for removing all undissolved impurities including suspended solids, colidall impurities having Feed Prussure-5 Bar.

H.K.DAS AND CO. (BID ID -6730774)

M/S. Sajahan Chowdhury (BID ID -6741680)