Modification of cooling arrangement at Departure Upper Lounge maintained by TFS at NSCBI Airport, Kolkata

Amount

Supply, Installation, Testing and commissioning of factory buit floor mounted chilled water double skin type air handling units made of panels consisting of pre plasticised G.I. casing of 0.60mm outside layer and 0.6 mm inside layer with polyurethene foam (PUF) insulation of 25mm minimum thickness and 38 kg/cum density injected between them, complete with blower section with blower suitable for static presure as detailed below, cooling coil section with aluminium finned copper tubes ( tubes thickness not less than 0.5mm ) cooling coil, filter section with 50mm thick washable synthetic type air prefilters belt drive package with TEFC drive motor suitable for 415±10% volts , 50Hz, 3 Phase AC supply, drain connections, stainless steel (18G) drain pan PUF insulation necessary vibration isolation arrangement etc. complete as per specification and of following capacities.

Air - Qty. Cooling Static CFM Coil rows Pressure AHU'S Floor mounted / Ceiling Suspended CFM RD SP 24000 6 50

Supply, Installation, Testing and commissioning of factory buit floor mounted / ceiling suspended chilled water double skin type air handling units made of panels consisting of pre plasticised G.I. casing of 0.60mm outside layer and 0.6 mm inside layer with polyurethene foam (PUF) insulation of 25mm minimum thickness and 38 kg/cum density injected between them, complete with blower section with blower suitable for static presure as detailed below, cooling coil section with aluminium finned copper tubes ( tubes thickness not less than 0.5mm ) cooling coil, filter section with 50mm thick washable synthetic type air prefilters belt drive package with TEFC drive motor suitable for 415±10% volts , 50Hz, 3 Phase AC supply, drain connections, stainless steel (18G) drain pan PUF insulation necessary vibration isolation arrangement etc. complete as per specification and of following capacities.

Air - Qty. Cooling Static CFM Coil rows Pressure AHU'S Floor mounted / Ceiling Suspended CFM RD SP 6000 4 50

Supplying, laying/ fixing, testing and commissioning of following nominal sizes of chilled water piping inside the building/masonary ducts (with necessary clamps, vibration isolators, bends, reducers, tees, supports, flow indicators etc fittings but excluding valves, strainers, gauges etc.) duly insulated with following closed cell elastometric nitrile rubber of minimum 45 Kg / m3 density, thermal conductivity 0.037 W/MK or better at 20 deg mean temperature class ‘O’ insulation applied by suitable adhesive complete including repairing of damage to building etc. as per specifications and as required complete in all respect. Note:- The Pipes of sizes 150 mm & below shall be M.S. ‘C’ class as per IS : 1239. (Thickness of the nitrile insulation shall be 32 mm).

100 mm dia

80 mm dia

50 mm dia

Supply, installation, testing and commissioning of following nominal sizes of Class O Nitrile Rubber insulated ( insulation thickness 19mm ) MS Drain water piping of following sizes with necessary clamps, bends, supports, etc as required and specified

50mmdia.

Supply, fixing, testing and commissioning of following valves, strainers, etc. duly insulated with same specifications as that of connected piping complete with companion flanges, nuts, bolts, gaskets, adequate support etc. as specified.

BUTTERFLY VALVE (MANUAL) with C I body SS Disc, Nitrile Rubber Seal & O- Ring PN 16 pressure rating for chilled water/hot water circulation as specified

100 mm dia

80 mm dia

50 mm dia

BALANCING VALVE with C I body flanged construction with EPDM coated disc with long pitch with protected out pipe insulation & PN 16 pressure rating for chilled / hot water circulation as specified.

80 mm dia.

BALANCING VALVE with brass body screwed construction with EPDM coated disc with long pitch with protected out pipe insulation & PN 16 pressure rating for chilled / hot water circulation as specified.

50 mm dia.

Y - STRAINER of Ductile CI Body flanged ends with stainless steel strainer for chilled / hot water circulation including insulation as specified.

80mmdia.

50mmdia.

Supply, Installation, Testing and Commissioning of following sizes electronic, self-balancing, pressure independent type dynamic balancing valve with integrated 2 way modualating control valve in a single body. The actuator shall be capable of accepting upto 10V DC and upto 20mA electric signal and shall provide similar transduced feedback output to control system. Maximum close off pressure shall not be less than 6 Bar for upto 50 mm valves and 7 Bar for 65 mm & above. Valves should have pressure rating of 25 Bar minimum.

80mm dia.

50mmdia.

SITC of Automatic Air Vent with ball valve in brass connection complete with nipples, union etc as required at all high points in the pipe lines. The valve shall be such as to have non-return valve as integral part of the valve.

Supply, Installation, Testing, & Commissioning of BMS point complete with necessary clamps, bends, supports, etc as required and specified.

Supply, installation, testing and commissioning of test points in brass / bronze construction with non return ring complete with suitable size socket on insulated / un-insulated lines complete nipples etc. as required for measurement of pressure and temperature.

Supply of thermometer with adopter for above test point.

Providing & fixing pressure gauges for AHUs including forged ball valves and pipe stem complete as required

Supply, Installation, Testing Balancing & Commissioning of the following items as per approved working drawings, specifications and requirement G.S.S square/ rectangular factory fabricated ducting complete with gaskets, elbows, splitters, vanes, supports etc. as per drawings and as required for air distribution.

G.S.S square/ rectangular site fabricated ducting complete with gaskets, elbows, splitters, vanes, supports etc. as per drawings and as required for air distribution.

1.25 mm thickness

1.00 mm thickness

0.80 mm thickness

Supplying and fixing of following thickness closed cell Nitrile rubber (Class “O”) insulation on existing duct after applying suitable adhesive for Nitrile rubber. The joints shall be sealed with 50 mm wide and 3 mm thick self adhesive nitrile rubber tape insulation complete as per specifications and as required

25 mm thickness

Supply, installation, testing and commissioning of GI volume control duct damper complete with neoprene rubber gaskets, nuts, bolts, screws linkages, flanges etc, as per specifications.

Supplying and fixing of acoustic lining of duct with Open Cell Nitrile Rubber density 140-180 Kg/m³. Applied by Adhesive, conforming to standard specification.15 mm thickness

Fire proof double layered silicon coated fabric, air tight, water proof, to with stand high temprature, non flamable type, canvass cloth connection for AHU outlet complete with drawn aluminum flanges on both sides for connection to AHU and duct complete with nuts, bolts etc. as per specification.

Supplying, Fixing,testing and commissioning of fire dampers in supply air duct/main branch and return air path as and where required of required sizes i/c control wiring,the damper shall be motorized and spring return so as to close the damper in the event of power failure automatically and open the same in case of power being restored. The spring return action shall be inbuilt mechanism and not externally mounted. The damper shall also be closed in the event of fire signal complete as required and as specified.

Fire damper

Actuator

Steel work in M.S. Tubular section /M.S. Square section /M.S. Plates i/c cutting to required length welding & fixing the members to RCC/Brick structure/Pre-fabricated structure with anchor fastners as per releavent drawing and direction by the Engg. -in-Charge i/c application of one coat epoxy primer on exposed surfacess.(75 micron thick) and Polyurethene Painting of 75 micron DFT

100 Amp 3P MCCB 10 kA complete with variable frequency drive (VFD).

63 Amp 3P MCCB 10 kA complete with variable frequency drive (VFD).

Supplying, laying, effecting proper connections, testing & commissioning of the following sizes of 1.1 KV armoured Cross Link Poly Ethylene Aluminium conductor cables conforming to relevant latest amended Indian Standards laid over MS supports &Cable Trays including clamping the cables to supports in an approved manner as required complete with all accessories. (Includes the cost of supply, laying on surface/Trays and End terminations on both ends)

4C x 25 sq.mm XLPE cable

3C x 16 sq.mm XLPE cable

3C x 10 sq.mm XLPE cable

Supply and laying of following sizes of 6 SWG GI earthing wires including fixing clamps and effecting proper connections to equipment etc. complete as required.

SOM ENGINEERING WORKS