PLAN (30) - 2019- 20- T S S - Supply Erection trial run and commissioning of wet Well Submersible stand by pump set at Kannamoola and Dry well Submersible stand by pump set at Murinjapalam Pump houses

Amount

KANNAMOOLA PUMP HOUSE

Supply,Erection,commissioning and trial run of non- clog wet well installed sewage raw water submersible pump with mono block motor having a total head of 30.63 m and discharge of 792 m3/hr speed less than 1000 rpm with all accessories at Kannammoola pump house of the following specification. Pump:- Non clog wet well installed submersible pump with 20 m cable with the following specification and materials of construction for pumping sewage of specific gravity 1.05 with mono block motor construction and soft starter panel speed (N)-1000 RPM,Discharge(Q) 792 m3/hr H 30.63 m efficiency not less than 75%. Casing and Impeller:- The Impeller (s) shall be of semi open multi vane,back,swept, non clog design.The impeller vane shall be self -cleaned upon each rotation and shall keep the vane clear of debris .maintaining an unobstructed pumping.The impeller(s) shall have heavily back swept leading edges with a specific angle distribution enabling the capability of handling solids,fibrous materials,heavy sludge and other matter in waste water.The design of the impeller shall prevent build up at the leading edge.Impeller shall be locked to the shaft and be easy to fasten and to remove.The clearance between the pump housing/insert ring and the impeller shall be adjustable. The leading edges shall be induction hardened to a depth of 4-5 mm. The hardness shall have a minimum of 45 HRC .The impeller and pump housing shall be of grey iron EN1561-GJL-250 or ASTM -A48-No 35 B. Pump volutes shall be single piece non concentric design with smooth passages large enough to pass any slides that may enter the impeller.The volutes shall have a mating flange machined and be prepared for a flush valve. Motor:-suitable capacity class H squirrel cage lowed in air filled water tight chamber induction motor voltage 415+/-10%,power supply 50 Hz+/-3% motor cooling by handled liquid equivalent mechanical seal combination including all suitable accessories such as suction pipe,delivery pipe,ex panders/reducers to existing pipe,sluice valves-2no, NRV-1 no,bends,connection to the existing header as required with fittings,required flange joints, mechanical joints,nuts& bolts,gaskets etc.pump and motor shaft shall be the same units.The pump shaft is an extension of the motor shaft. coupling shall not be acceptable.The shaft materials shall be ASI type 431 stainless steel. The use of stainless steel sleeves will not be considered equal to stainless steel shafts. The outer design shall be maintenance optimized.The pumps shall be easy to clean when serviced.

Each pump shall be provided with plug in seal until consisting of two independent working mechanical face seals and propelled that also circulate the coolant in the cooling system.The spring shall be positioned so they always are protected from the pump media.The seal shall operate in conjunction with a liquid reservoir that continuously lubricate and cool the seal faces. Both seals shall comprise one stationary and one mechanical driven rotating ring. Each seal interface shall be held in contact by its own spring system. The seal shall not depend on direction of rotating for sealing. The seal cavity for the outer seal shall be equipped with means for wear reduction such as spiral grooves for partical removal. The support bearing shall consist of a double row angular contact ball bearing. The motor shall be designed for continuous duly handling pumped media of 40oC and capable of up to 15 evenly spaced starts per hour. Thermal switches set to open at 140oC and close at a minimum of 70oC, shall be embedded in the stater lead coils to monitor the temperature of each phase winding. These thermal switches shall be used in conjunction with and supplemental to external motor overload protection and shall be connected to the control panel. The motor and pump shall be designed and assembled by the same manufacture. The motor shall be designed for operation up to 40oC ambient temp with a temperature rise not to exceed 80oC. A motor performance chart shall be provided showing curve for torque,current, power factor,input/ output KW and efficiency.The chart shall be also includes data on starting and no load characteristics. The motor and the cable shall be capable of continuous submergence under water without loss of watertight integrity according to protection class IP 68(20m). The rated power shall be adequate so that the pump is not over-loading throughout the entire indicated pump performance curve. Starter:- Soft starter with control panel suitable for running above pump with level control and motor safety control device viz;winding temperature control,current overloading,scale monitoring etc.pump starter panel suitable for 1 pump including handling,erection and commissioning etc complete. Others;- Suitable panel board,Cabling,Earthing etc conforming to relevant standard to be provided* Refer tender documents and special conditions for more details

Supply of pump set of the above specifications

MURINJAPALAM PUMP HOUSE

Supply,Erection,commissioning and trial run of non- clog dry well sewage e raw water submersible pump with mono block motor having a total head of 18.85 m and discharge of 500 m3/hr speed less than 1000 rpm with all accessories at Murinjapalam pump house of the following specification. Pump:- Non clog dry well installed submersible pump with 20 m cable with the following specification and materials of construction for pumping sewage of specific gravity 1.05 with mono block motor construction and soft starter panel speed (N)-1000 RPM,Discharge(Q) 500 m3/hr H 18.85m efficiency not less than 75%. Casing and Impeller:- The Impeller (s) shall be of semi open multi vane,back,wept, non clog design.The impeller vane shall be self -cleaned upon each rotation and shall keep the vane clear of debris .maintaining an unobstructed pumping.The impeller(s) shall have heavily back swept leading edges with a specific angle distribution enabling the capability of handling solids,fibrous materials,heavy sludge and other matter in waste water.The design of the impeller shall prevent build up at the leading edge.Impeller shall be locked to the shaft and be easy to fasten and to remove.The clearance between the pump housing/insert ring and the impeller shall be adjustable. The leading edges shall be induction hardened to a depth of 4-5mm. The hardness shall have a minimum of 45 HRC. The impeller and pump housing shall be of grey iron EN1561-GJL-250 or ASTM -A48-No 35B or steel impeller of stainless grade BG8M/CF8M as per IS -210-1978 or equivalent.Pump volutes shall be single piece non concentric design with smooth passages large enough to pass any slides that may enter the impeller.The volutes shall have a mating flange machined and be prepared for a flush valve. Motor:-suitable capacity class H squirrel cage lowed in air filled water tight chamber induction motor voltage 415+/-10%,power supply 50Hz+/-3% motor cooling by handled liquid equivalant mechanical seal combination including all suitable accessories such as suction pipe,delivery pipe,ex panders/reducers to existing pipe,sluice valves-2no,NRV-1no,bends,connection to the existing header as required with fittings,required flange joints, mechanical joints,nuts& bolts,gaskets etc.pump and motor shaft shall be the same units.The pump shaft is an extension of the motor shaft. coupling shall not be acceptable.The shaft materials shall be ASI type 431 stainless steel. The use of stainless steel sleeves will not be considered equal to stainless steel shsfts. The outer design shall be maintenance optimized.The pumps shall be easy to clean when serviced.

Each pump shall be provided with plug in seal until consisting of two independent working mechanical face seals and a propeller that also circulate the coolant in the cooling system.The spring shall be positioned so they always are protected from the pump media.The seal shall operate in conjunction with a liquid reservoir that continuously lubricate and cool the seal faces. Both seals shall comprise one stationary and one mechanical driven rotating ring. Each seal interface shall be held in contact by its own spring system. The seal shall not depend on direction of rotating for sealing. The seal cavity for the outer seal shall be equipped with means for wear reduction such as spiral grooves for partical removal. The support bearing shall consist of a double row angular contact ball bearing. The motor shall be designed for continuous duly handling pumped media of 40oC and capable of up to 15 evenly spaced starts per hour. Thermal switches set to open at 140oC and close at a minimum of 70oC, shall be embedded in the stater lead coils to monitor the temperature of each phase winding. These thermal switches shall be used in conjunction with and supplemental to external motor overload protection and shall be connected to the control panel. The motor and pump shall be designed and assembled by the same manufacture. The motor shall be designed for operation up to 40oC ambient temp with a temperature rise not to exceed 80oC. A motor performance chart shall be provided showing curve for torque,current, power factor,input/ output KW and efficiency.The chart shall be also includes data on starting and no load characteristics. The motor and the cable shall be capable of continuous submergence under water without loss of watertight integrity according to protection class IP 68(20m). The rated power shall be adequate so that the pump is not over-loading throughout the entire indicated pump performance curve. Starter:- Soft starter with control panel suitable for running above pump with level control and motor safety control device viz;winding temperature control,current overloading,scale monitoring etc.pump starter panel suitable for 1 pump including handling,erection and commissioning etc complete. Others;- Suitable panel board,Cabling,Earthing etc conforming to relevant standard to be provided. * Refer tender documents and special conditions for more details

Supply of pump set of the above specifications

Bidder Name

NIRMAN ELECTRICALS