Public Works Department Tender

`Supply, Installation, Testing and Commissioning of following sizes electronic, self- alancing, pressure independent type dynamic balancing valve with integrated 2 way modualating control valve (PIDB / High Rangeability 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 and above. Valves should have pressure rating of 25 Bar Minimum. The modulating valves cost included with Digital Thermostat alongwith necessary wiring. DSR : 16.11.4 ` 40 mm

INSULATED CHILLED / HOT WATER PIPING (Expanded Polystrene insulation) - DSR: 16.3 `Supplying, laying/ fixing, testing and commissioning of followingnominal sizes of chilled water piping inside the building (with necessary clamps, vibration isolators and fittings but excluding valves, strainers, gauges etc.) duly insulated with 80 kg/cum density resin bonded fiber glass or 144 Kg/ cu m density mineral wool (non Combustible) pipe section insulation covered with a layer of 120 gm/sqm polythene sheet (vapour barrier) and finally applying 0.63mm aluminium sheet cladding complete with type3 , grade 1 roofing ltstrip(as per IS:1322 as amended up to date ) at joints and repairing of damage to building etc. as per specifications and as required. ` Note:- The Pipes of sizes 150mm and below shall be M.S. `C` class as per IS : 1239 and pipes size above 150mm shall be welded black steel pipe heavy class as per IS: 3589, from minimum 6.35mm thick M.S. Sheet for pipes upto 350 mm dia. and from minimum 7mm thick MS sheet for pipes of 400 mm dia and above. 200 mm dia.(75 mm thick insulation)

Drain Piping Supply and installation of Rigid UPVC piping complete with U trap, fittings, elbows, bends and supports / steel wire rope hangers as per specifications and duly insulated with 6 mm thick closed cell Nitril rubber with factory laminated 7 mil glass cloth or Chemically cross linked polyethlyne foam of class`O`(XLPE) with Aluminium PE foil for as per given below pipe size. The joints shall be sealed with 50 mm x 1 mm thick self adhesive tape at the joints etc.as per specifications. 50 mm dia ( Working pressure - 6Kg/cm2)