Annual Maintenance contract May 2026 to March 2027 for 01 Nos RO 500 LPH Capacity 03 No RO 250 LPH Capacity at BSF Campus Rajarhat under Ftr HQ BSF South Bengal.

Annual Maintenance contract of RO plants with following conditions:-1) Checking the individual water treatment unit for the performance like flow rate,treated water quality and leakage etc if any 2)Checking the performance of Reverse Osmosis water purification unit for system pressure, and replacement of cartridge, cleaning of membrane with cleaning chemicals etc where ever required. (Necessary stores to be supplied by deptt. Free of cost).3)Checking/testing the final treated water quality with the available test kits.4)If the Malfunction of the unit is noticed, Corrective measures to be taken for the same.5)Service personnel is required to pay one visit per month.6)No extra payment will be made for any additional visit by service personnel. 7)AMC includes servicing/preventive maintenance only excluding spares required if any. 8)Servicing of plant with available consumables and to keep the plant in a functional state during maintenance period.

Providing and Fixing Ultrafiltration (UF) 12" membrane of approved quality including removal of existing UF complete as per dirction

Supplying and filling De-chlorination grade Activated carbon in granular form of particle size 1.50 mm conforming to HSN Code 8481 with following parameters :- i) Adsorption capacity for carbon- tetrachloride, ( Min 55 % by mass ) ii ) Moisture content ( Max 5 % by mass) iii ) Ash content ( Max 5 % by mass ) iv ) Decolourizing power ( Min 90 mg / gm ). v ) Hardness number ( Min 90 ) vi) Retentivity index ( Min 45 % by mass ) vii ) Surface area – ( Min 550 m2 / g )

Supplying and filling Silex Filter Media conforming to HSN Code 25171090 :- Made from pure quartz ( crystalline structure ) ground to 2-3 mm particle size , washed, dried and screened to meet prevailing standards and with following parameters:- i) Should be white and clear of any impurities. ii ) Inert to acids, alkalies & chemicals and bearing good abrasion resistance. iii ) Acid solubility to be less than 0.5 % iv) Virtually free from fines and silts.

Supplying and filling Filter Media Sand of particle size 0.80 to 1.60 mm conforming to HSN Code 25171090 bearing following parameters :- i) Composed of sub-angular, hard, durable, and dense grains of predominately siliceous material. ii ) Extracted from a clean glacial sand deposit, washed, clean dried, and screened to meet prevailing specifications

Supplying and filling Citric Acid Monohydrate (Membrane cleaning solution) conforming to HSN Code 29181400 with following parameters :- i) Colorless crystalline organic compound belonging to carbolic acid family having functions of acidity regulator, sequestering and stabilizing agent, antioxidants synergism, firming agent. ii ) To maintain stability of active ingredients and as an acidulant to control pH.

P/I/T/C Bottom Connection Pressure Gauge of range( 0 to 7 Kg / Cm2 ) Dial size - 100 mm [2.5"] Connection Size - 1/4" BSP Display Type : Analog Material Grade SS 304 Measuring Range 0 to 3000 Psi Weight - 0.240 kg

Providing and fxing RO Membrane 40x40: Material: Polyamide Thin-Film Composite Maximum Operating Temperature 45 Degree C Maximum Operating Pressure 600 psi Maximum Feed Flow Rate 16 gpm (3.6 m 3 /h) Item Weight: 7 Pounds Maximum Pressure Drop: 15 psig Free Chlorine Tolerance: <0.1 ppm pH Range Continuous Operation 2 - 11 Maximum Feed Silt Density Index (SDI) SDI 5 Salt Rejection % 99.5 % Dimensions ‎40 x 4 x 4 inches Brand: DOW FILMTECH / HYDRANAUTICS / DUPONT / Equivalent

Providing and placing in position/Locations polypropylene filter Cartridge/Candle ( conforming to HSN code 39269099 Size:20" Diameter:2.5" (OD 60-115 mm & ID 27-30 mm) Micron Rating: 5 with following parameters:- i) Polypropylene fibre and polypropylene core. ii) Maximum operating temperature 70 degree C. iii) Operating Pressure up to 10 Bar. PRATHAM/AQUAPURO/Equivalent.

Providing and fxing Big Blue Water Filter Housing Size 20 Inches Material Polypropylene Inlet & Outlet - 1" ( 25 mm ) Color Blue/Black Cap. - 100 Lph To 2000 Lph Max Pressure 7Kg. Include Spanner, Air Release Valve Able to Accept up to 4-1/2" diameter cartridges HSN Code :- 8421 PENTAIR / Equivalent