SERVICING / MAINTENANCE / MINOR REPAIR OF 60 TR TO 120 TR CENTRAL TYPE AC PLANT AT NAVAL DOCKYARD VISAKHAPATNAM

Amount

Repairs, overhauling and servicing of JS84 of make 'YORK' (semi sealed) 100 TR AC Plant compressor by stripping out both end covers, cylinder head, cylinders, connecting rod, crank shaft, oil pump, side covers, bush bearings etc. and refrigerant taking the cylinder for reuse (if available) of unserviceable worn out parts in the compressor, cleaning the system with CO2 / Nitrogen gas for leak detection for minimum 24 HRs, after flushing out the system, vacummization and charging with refrigerant gas & compressor oil and testing the unit on no load and full load conditions complete all as specified and directed. [Note : - Refrigerant gas, compressor oil and spare parts shall be measured and paid seperately].

Supply only following spare parts suitable for JS84, Make - York

Seal 'O' ring

Bearing crank shaft

Washer Thrust

Pin piston

Sleeve cylinder

Gasket Head top Hhc

Gasket bearing head to Hsg

Gasket manifold

Gasket term block

Gasket term bolt

Plate valve suction

Valve, suction reed

Valve, discharge reed

Cage, Valve discharge

Piston

Gasket 3 1/2 cap val

Gasket cap 3

Gasket motor cover

Gasket oil pump

Rod connecting long

Spring retainer circlip

Spring helical discharge

Spring helical pin lift

Spring helical suction

Ring piston

Crankcase heater

Screen suction

Repairs, overhauling and servicing of JS64 of make 'YORK' (semi sealed) 75 TR AC Plant compressor by stripping out both end covers, cylinder head, cylinders, connecting rod, crank shaft, oil pump, side covers, bush bearings etc. and refrigerant taking the cylinder for reuse (if available) of unserviceable worn out parts in the compressor, cleaning the system with CO2 / Nitrogen gas for leak detection for minimum 24 HRs, after flushing out the system, vacummization and charging with refrigerant gas & compressor oil and testing the unit on no load and full load conditions complete all as specified and directed. [Note : - Refrigerant gas, compressor oil and spare parts shall be measured and paid seperately].

Supply only following spare parts suitable for JS64, Make - York :

Seal 'O' ring

Bearing crank shaft

Washer Thrust

Pin piston

Sleeve cylinder

Gasket Head top Hhc

Gasket bearing head to Hsg

Gasket manifold

Gasket term block

Gasket term bolt

Plate valve suction

Valve, suction reed

Valve, discharge reed

Cage, valve dishcharge

Piston

Gasket 3 1/2 cap val

Gasket cap 3

Gasket motor cover

Gasket oil pump

Rod connecting long

Spring retainer circlip

Spring helical discharge

Spring helical pin lift

Spring helical suction

Ring piston

Crankcase heater

Screen suction

Material and labour for disconnecting, taking out the compressor of 100 TR capacity from the bed, transportation to workshop and removing the existing stator winding and rewinding with new super enameled copper wire of same guage and same number of turns after thorough cleaning of stator body and rotor applying insulating varnish, drying up by heating for improving ohmic valve, reassembling the motor by replacement of bearings including painting with one coat of synthetic enamel paint, reinstalling on its original position connecting up, testing complete all as specified and directed.

Supply only R-22 gas. Make:-Refron 22/Floron 22/Mafron 22

Supply only R-134 A gas. Make:-Refron/Floron/Mafron

Supply only compressor oil. Make:-Servo/N-68

Supply only compressor oil. Make :- BSE -170

Material and labour for descaling the following condensers by using HCL acid with continuous circulation method using circulation pump, finally neutralizing with fresh water, opening both end covers of shell and tube condensers, cleaning of copper tubes manually by using nylon brushes, re-fixing the end covers with new neoprene rubber gaskets, commissioning after complete performance test of the system all as specified and directed.

120 TR capacity

100 TR capacity

60 - 80 TR capacity

Material and labour for checking the complete refrigeration system of the AC plant, leak testing with CO2 gas under constant pressure of 250 PSI after complete transfer of refrigerant gas from the entire system, rectification of leakages including cutting and brazing the refrigeration pipes wherever required, replacement of "O" rings, teflon washers of valves, copper tubing, flare nuts etc., neutralizing after the pressure hold good for at least 24 hours vacuumization of system, testing and commissioning of following air conditioning plants:

60 - 80 TR capacity

100 / 120 TR capacity

Supply and fix shaft seal for 120 TR AC plant, taking out refrigerant resue (if available) and taking out old unserviceable shaft seal in the compressor, cleaning the system with CO2/Nitrogen as for leak detection for minimum 24 hrs, after flushing out the system, vacuumization and charging with refrigerant gas complete all as specified and directed. Make - Kirloskar [Note : Refrigerant gas shall be measured and paid separately].

Supply and fix shaft seal for 60 TR AC plant, taking out refrigerant resue (if available) and taking out old unserviceable shaft seal in the compressor, cleaning the system with CO2/Nitrogen as for leak detection for minimum 24 hrs, after flushing out the system, vacuumization and charging with refrigerant gas complete all as specified and directed. Make - Carrier, Model - 5H 60 [Note : Refrigerant gas shall be measured and paid separately].

Material and labour for preparation of surfaces by scrapping and removing rusted portion with wire brush and applying one coat of synthetic enamel paint for complete refrigeration system, in-let/out-let pipe lines, compressor unit, condenser pump set, control LT panel board duct covers, cooling tower stand including lettering & numbering and applying one coat of white/colour wash to chiller pipe line all as specified and directed

Material and labour for complete checking, servicing/ rectification of electrical circuits for all units and control wiring showing phase sequence with proper lugging of AC plant control panel including replacement of fused indication lamps with new ones, cleaning of all power contacts, rectification of minor defects in Ammeters and Voltmeters, testing and commissioning all as specified and directed. [Note :- Material such as indication lamp, ammeter, voltmeter shall be measured and paid separately].

Supply and fix in repairs pilot solenoid valve to the refrigerant system, reconnecting the refrigeration piping including ,leak testing, brazing to the pipe line, necessary copper tubing etc., wherever required all as directed Make :- Sporlon/Donfos

Supply and fix pressure gauge for suction/discharge refrigerant lines and water lines of square/round type 2"/4" dial for the following ranges for Package/Central type AC plants including taking down old unserviceable pressure gauge complete all as specified directed Make -Air Master/Febig/Scientific

0-150 PSI for refrigerant line

0-300 PSI for refrigerant line

0-12 Kg./cm2 for water line

Material and labour for taking out the defective pressure cut-outs of any range and model and supply & fix new pressure cut-outs, connecting the pressure lines/control wiring, leak testing and commissioning all as specified and directed Make:-Indofoss/Danfoss/Ranco

HP/LP pressure cut-out MP-15

Water pressure cut-out IPS-70

Low pressure cut-out MP-1

High pressure cut-out MP-5

Oil pressure cut-out MP-55

S&F for VVE-70 model expansion valve of Sporlon make with necessary modification, brazing, lead testing and commissioning including taking out old unsv expansion valve complete all as specified and directed.

All as per item No.20.00 above but for VVE- 52

All as per item No. 20.00 above but for VVE- 45

Material and labour for monthly cleaning of entire indoor substation buildings inside wall, ceiling, floor and outside wall, plinth protection with suitable brush/broom/wiper, removing wild vegitation around substation building complete all as sjpecified and directed.

Supply and fix rubber insulating mat in front of LT panel board of size 2 mm thick, 1 m width up tp 3.3 KV, make RPG or equivalent as approved by GE.

Supply only indication lamps (LED type) red, yellow and blue in colours of 22.5 mm dia to monitor on LT panel board suitable for 240 V AC supply and taking down unserviceable indication lamps all as specified and directed. Make:-Siemens/C&S/schneider/ABB

De-carbonizing/cleaning of LT 415/380 V, 3 phase bus bar, bus bar chambers of LT panels electrical connections complete, LT ACB, switch fuse unit arrangement, in-coming and out-going installed in gallery / jetty /sub-station and cleaning the bus bar with CTC, applying, Backtol (red) solution to the bus bar insulators, checking all the connections, tightening the nuts, bolts, thimbles duly applied with petroleum jelly to nuts, bolts and thimbles of in-coming and out-going system complete including replacement of defective rusted bolts, nuts and spring washers with new cadmium coated ones all as specified and directed.

Taking down existing corroded/ unserviceable portion of MS flat/angle iron supports/ channels of various sizes fitted in electrical panels in AC plants and supply & fix MS flat/ angle iron including necessary bolting/ welding etc., all as as specified and directed.

Supply & fix HMI display board with micro processor controller touch pad for 26 TR ductable AC plant (Model No : - 30RBS80S [Make - Carrier) including taking out old unserviceable one complete all as specified and directed].

Supply & fix NRCP board for 26 TR ductable AC plant (Model No. CEBD 430335 - 16 - RB, [Make : - Carrier) including taking out old unserviceable one complete all as specified and directed].

Supply & fix EXV board suitable for 26 TR ductable AC plant (Make - Carrier ) including taking out old unserviceable one complete all as specified and directed.

Supply & fix suction gas temperature tranduger (LP) for 26 TR ductable AC plant (Make - Carrier) including taking down unserviceable complete all as specified and directed.

Supply & fix discharge gas temperature tranduger (HP) for 26 TR ductable AC plant (Make - Carrier) including taking down unserviceable complete all as specified and directed.

Supply & fix leaving water temperature sensor for 26 TR ductable AC plant (Make - Carrier) including taking down unserviceable one complete all as specified and directed.

Supply & fix entering water temperature sensor for PHE for 26 TR ductable AC plant (Make - Carrier) including taking down unserviceable one complete all as specified and directed.

Supply & fix outside temperature sensor for 26 TR ductable AC plant (Make - Carrier) including taking down unserviceable one complete all as specified and directed.

Supply & fix HP switch for 26 TR ductable AC plant (Make - Carrier) including taking down unserviceable one complete all as specified and directed.

Supply & fix LP switch for 26 TR ductable AC plant (Make - Carrier) including taking down unserviceable one complete all as specified and directed.

Material and labour for repair/maintenance of 26 TR ductable AC plant by leak testing with N - 2 gas under constant pressure of 250 PSI (17 Kg/cm2) after complete transfer of refrigerant gas from the entire system, rectification of leakage by cutting and brazing the refrigeration system wherever required, replacement of 'O' rings, teflon washers of valves, copper tubing, safety valves, flare nuts etc. neutralising after the pressure holds, good for atleast 24 hours, vaccumization, charging the system with refrigerant gas, performance test and commissioning complete all as specified and directed. (Note : - Gas charging shall be measured and paid separately)

Material & labour for 26 TR ductable AC plant complete checking, servicing / rectification of electrial circuits for all units and control wiring showing phase sequence with proper lugging of AC plant control panel including replacement of fused indication lamps with new ones, cleaning of all power contacts, rectification of minor defects in Ammeter and Voltmeters, testing and commissioning complete all as specified and as directed.

Supply and fix MCCB of 320 Amps, 3 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed. Make - Indo Asian/Havells/L&T

Supply and fix MCCB of 250 Amps, 3 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed. Make - Indo Asian/Havells/L&T

bhavani constructions

SRIVEN TECHNOLOGIES

Srinivash Engineers

SRI SIDDHI VINAYAKA ENTERPRISES

ANAND ENTERPRISES AND ENGINEERS

UNIVERSAL ENTERPRISES