Supplying and Commissioning of 20 KW Non clog submersible pumpset for pumping out the storm water of Mettuvoikkal at Muthalamman Temple Nellithope, Puducherry.

Amount

Supply and delivery of submersible 20KW sewage non-clog pumps for a duty point of 13.6m head and discharge of 400 m3/hr, wear resistance with submersible motor for the various duty conditions. Pump shall be capable of handling min 110mm solid size with sewage specific gravity of upto 1.05. Pump shall be of robust construction. Liquid passages shall be finished smooth and designed as to allow free passage to solids. Pump impeller should be of S – Tube impeller design. Double mechanical seal with silicon carbide faces should be provided to protect the motor from ingress of sewage along the shaft. The critical speed of the rotor shall be at least 30% above the operating speed. Pumps to have double bearings between the pump & motor. The bearings life shall be minimum 100,000 hrs of operation with greased for life. Pump should be provided with automatic coupling device including pedestal, duck foot bend, stainless steel guide pipe or related accessories of suitable size to facilitate lifting and lowering into guide rails for easy maintenance. Pump shall be provided with a stainless steel lifting chain conforming to BS 970 Gr 304. Pump speed shall be of 960 for high duty pumps and 960 to 1450 rpm for low duty pumpsets. Casing should be CI (EN 1561 EN –GJL-250) and impeller should be of CI (EN 1561 EN-GJL-250) as per IS standard more preferably with hardened impeller. Shaft should be if stainless steel ATS 410. All the fasteners and bolts shall be of AISI 410. The rotating assembly shall be dynamically balanced as per standards. The starting current of the motor shall not exceed 200% of rated full load current for star/delta or ATS starting under any circumstances.

The motor shall be suiotabe for full voltage star delta/ATS starting. Motor shall be designed to withstand 120% of rated speed for two minutes without any mechanical damage in either direction of rotation. Motor should be if IE3, explosion proof compatiable for operation together with star-delta/ATS starter, protectoion against increase in stater winding temperatures (15 deg celsus), bearing temperature leakage in the stater housing and terminal box shall be provided and to be suitably interlocked with the control panel for tripping the pump in case of increase in temperature beyond set limit. Insulation class shall be of ‘’Class H’’ and degree of protection shall be of IP68 as per IS 4691. Motor shall be suitable for continuous operation in fully submerged condition. Motor shall be supplied with 10mts of round submersible copper cable of suitable size

Supply, delivery and commissioning of control panel configuration DC 2PX20KW (43A)-SD-COM-Fdr-IP55 Outdoor mounted enclosure considered common feeder type with bypass starters Energy Meter with RS485 considered 1No MCCB considered as incomer cable bottom entry enclosure make – Reputed 1No CU362, 1No 10351B and 1No CIM260 Ultrasonic Level Transmitter with 4-20mA except ATS or changeover switch from main to DG, sim card and its recurring charges, power and control cabling outside the panel.

Supplying and erection of auto coupling DM200 cpl accessories as direcetd by the Engineer-in-charge.

Supply of chain dia 6mm GI X 8mtr length with hook will handled 500kg GI (Electro galvanized)

Supply and fixing of guide rail SS304/ 3.5inch 6Mts accessories as direcetd by the Engineer-in-charge.

Sri Balaji Construction