Directorate Of Municipal Administration Tender

Supply and delivery at site brand new suitable HP deep well submersible pumpset suitable for verticle installation in 165mm dia borewells comprising of single stage or multistage CF pump close coupled by means of stainless steel coupling to suitable HP suitable speed totally enclosed and filled with pure drinking water (wet type) squirrel cage submersible induction motor suitable for operation on 3Ph, 50Hz, 380/440 volts AC supply fitted with required accessories such as suction, casing, suction strainers, sand guard, non-return valve etc., complete. The pump and motor shall form an integral unit with all the required fittings. PUMP: The submersible pump conforming to the latest IS 8043 (1989) shall comprise of the following:- a) Bowl assembly with required number of closed grained cast iron castings hydraulically tested with its inner passage smooth finished and coated with zinc chrome to ensure better efficiency and less wear. Every stage bowl shall be provided with a bronze wear ring. b) Mixed flow "OR" radial flow impeller shall be made of bronze and shall be balanced both statically and dynamically. c) A stainless steel pump shaft provided with bearings sleeves made of leaded bronze OR d) Close grained cast iron suction casing sheathed with strainer to avoid ingress or bigger particles. e) Top pump casing shall be provided with a non-return valve fully streamlined for minimum friction. The non-return valve shall be suitable for flanged connections. SUBMERSIBLE MOTOR:- Totally enclosed water filled squirrel cage induction motor conforming to the latest IS9283-1995 shall be of wet type design suitable for water cooling and water lubricating. The submersible motor shall be fitted with the following:- a) Seamless steel tube outer motor casing. b) The stator shall be made of steel and shall be statically and dynamically balanced, the stator laminations shall be chemically tested and pressed under high pressure. The stator shall be vacuum impregnated with varnish from inside and epoxy painted outside shall be baked to ensure long life. The stator winding wire shall be of high quality electrical grade electrolytic copper provided with heat resistant coating and water proof, water resistant, hard PVC insulated tested of high voltage. The winding wire shall be of adequate current carrying capacity. c) The motor shall be made of high quality stampings the rotor lamination shall be stacked and fitted with electrical grade electrolytic copper bars and end rings. The rotor shall be mounted on stainless steel motor shaft and shall have stainless steel sleeves at the bearing end. The rotor shall be dynamically balanced to ensure vibration free operation. d) The motor shall be provided with Fixed/Mitchell type antifriction thrust bearing which is designed to withstand axial thrust loads with minimum wear and tear. A reflex pressure compensating device to guard against any rise in pressure shall be provided at the bottom. MATERIAL OF CONSTRUCTION. PUMP: Casing CI grade FG 200 IS 210/1978 Pump Shaft: Stainless steel AISI 410 Shaft Sleeves: Bronze LTB 3,4 or 5 of IS 318. Bearing Bush: -do- Impeller: Bronze LTB2 of IS 318 - 1981 Diffuser: CI - FG 200 of IS 210-1978 Wearing Ring: Bronze - LTB 3,4 or 5 of IS 318 Coupling: Stainless steel - AISI 410 2. MOTOR: Motor Casing: Seamless MS tubes. Motor Shaft: Stainless steel AISI 410 Bearing Bush: LTB 3,4 or 5 IS 318-1981 Thrust Bearing: LTB 3,4 or 5 of IS 318-1981 Breather diaphragm: Nitrile Rubber. NOTE: 1. The submersible pumpset with ISI mark shall only be offered. 2. The efficiency of the pumpset offered shall be not less than the efficiency stipulated in the IS 8043/1989 at the stipulated duty for which the pump offered. 3. The tenderer should quote only in the Schedule "B" of the prescribed tender form duly mentioning the make, type, number of stages, and horse power of the pumpset offered in their tender. 4. The performance curves of the submersible pumpset clearly indicating delivery head, efficiency of the pump combined efficiency of the pumpset power requirement of the pump plotted against the discharge of the pump shall be furnished along with detailed literatures on the pumpset offered with the tender. 5. The submersible pumpset shall be complete with all the required fittings. (PWD SR 2018-19, Pg no: XLI, item no: 29 10HP/7.5kW, 20stage in Texmo/atalanta/cri pumps & motors as directed by Engineer in charge.

Lifting of submersible pumpsets (RDWSS SR2019-20 Pg.No.104 I.No.12.34.k.) as directed by Engineer in charge.

Reerrection charges of pumping machineries including overhauling and painting (RDWSS SR2019-20 Pg.No.104 I.No.12.34.i.) as directed by Engineer in charge.