Plan (30)- 2018-19 -TSS- Supplying, erection and commissioning of wet well type non clog submersible pumpsets at Eanchakkal pump house

Amount

Supply, Erection, Commissioning and trial run of non-clog wet well installed sewage raw water submersible pump with monoblock motor, required support and auto locking for erecting inside well having a total Head of 16.5m and discharge of 385m3/hr, motor speed less than 1000rpm, Bronze/ Stainless Steel Impeller, SS shaft, Cast Iron casing, soft starter with control panel suitable for running above pump with level control, motor safety control device etc suitable panel board, capacitor, cabling, earthing etc. conforming to relevant standards with all accessories Eanchakkal sewage pump house of the following specifications:

Pump: Non-clog wet well installed submersible pump with 20m cable with the following specifications and materials of construction for pumping sewage of specific gravity 1.05 with monoblock motor construction and soft starter panel- speed (N) not more than 1000 rpm, Q 385M3/hr, Head 16.5m, Efficiency not less than 75 %

Casing and impeller:- The impeller (s) shall be of semi open multi vane, non-clog design. The impeller vanes shall be self-cleaned upon each rotation and shall keep the vane clear of debris, maintaining an unobstructed pumping.

Motor : Suitable capacity class H squirrel cage lowed in air filled water light chamber induction motor voltage 415+/-10%, power supply 50 Hz +/-3% all suitable accessories such as suction pipe, delivery pipe, expanders/reducers to existing pipes, sluice valves – 2Nos., NRV – 1No., bends, connection to the existing header as required with fittings, required flange joints, mechanical joints, nuts bolts, gaskets etc. The pump shall have auto locking facility. Pump and motor shaft shall be the same unit. The pump shaft is an extension of the motor shaft. Couplings shall not be acceptable.

The motor and pump shall be designed and assembled by the same manufacturer. The motor shall be designed for operation up to 40°C ambient temp with a temperature rise not to exceed 80°C. A motor performance chart shall be provided showing curves for torque, current, power factor, input/output KW and efficiency. This 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 over loading, scale monitoring etc, pump starter panel suitable for 1 pump including handling, erection and commissioning etc, complete. Others: suitable heavy duty APP Capacitor conforming to IS2834 for the motor to get power factor not less than 0.95, Cabling, Earthing etc. conforming to relevant standards to be provided. * Refer tender documents and special conditions for more details

Supply of pump set of the above specifications