Supply Installation Erection and Commissioning of 5 HP Submersible pump for Sewage application with Star Delta Starter Automating the operation of sewage pumps using Programmable Logic Controller(PLC) and Piping arrangements at Mullai Nagar Sewage St

Amount

Supply, Installation, Erection and commissioning of 5HP Submersible pump & Star-Delta Starter specially designed for sewage application having the below mentioned specifications. 1) Flow(m3/hr) : 70 2) Liquid Temperature(Deg.C) : 40 3) Head(m) : 12 4) Specific Gravity : 1.05 5) Power(bkW) : 4.37 6) SolidNature : Soft,non-fibrous 7) Voltage : 415V +/- 10% 8) SolidHandlingRequirement : 100mm 9) Frequency : 50Hz+/-3% 10) Capacity : 5.625kW/7.5HP 11) Rated speed (rpm) : 1450 12) Impeller Type : Semi open (Insulation : FClass) 13) Efficiency(%) : 55

1) General Specifications: Raw Sewage Pumps shall be submersible type of non –clog design. They shall be suitable for pumping soft solids of size 100 mm. Only pumps with maximum 1450 rpm shall be provided. In addition to this, the pumps shall be fitted with a special tearing system on the suction side for tearing soft solid material (Contra-block system). The impeller shall be of a non-clog design with smooth passage and solid handling capability of 100 mm size. Maintenance-free anti- friction bearing, deep grooved permanently greased filled ball bearings shall be provided to take care of all the axial and radial forces at any point of operation.

The pump installation design shall be such as to facilitate installation and removal of the pumps without having to enter into the sewage pit. The motor shall be squirrel cage type, suitable for three phase supply continuous duty with class ‘F’ insulation. Motor shall have integral cable parts and the cable entries shall be sealed. The cables must be leak tight with respect to liquids and firmly attached to the terminal block. The motor shall be designed for non-overloading characteristics. There shall be thermal protection against overheating of the motor winding.

The pump design shall ensure that seal does not come directly in contact with the liquid being pumped as well as cooling / lubrication by oil is provided. The moisture sensor of the tripping unit shall be located inside the oil chamber. The pump unit shall be supplied along with the special skirt base, flanged elbow, lifting chain with shackles and delivery piping.

2) Reverse Rotation: The pump shall be designed to operate safely in the reverse direction of rotation, due to wastewater returning through the pump.

3) Pump Construction: The pump casings shall be of cast iron and conform to IS: 210 Gr FG 260. The internal surfaces shall be free of rough spots. The casing shall have centre line discharge. The material of impellers shall be as specified and they shall be of the single vane type. They shall be dynamically balanced. The leading edge of the vanes shall be rounded and cut back to prevent rags, stringy material etc. from impinging on the impeller vanes.

4) Pump Shaft The pump shaft shall be hard chrome plated alloy steel or stainless steel. The shaft shall be of one-piece construction.

5) Pump Bearings: Pump bearings shall be of the antifriction type. The bearings shall be able to take normal axial thrust loads due to unbalanced hydraulic loads on the impellers plus the weight of all rotating parts of the pumps. Pump bearings shall be designed with a minimum life of 40,000 hours. The bearings shall be grease lubricated for life and shall be maintenance free.

6) Mechanical Seal: A double mechanical seal of approved type shall be provided to prevent pumped liquid entering into the motor winding. The seals shall be running in oil bath. The oil bath shall have moisture sensors to sense water leakage. The sensors shall be used for tripping the pump and also for alarm.

7) Pump balance: All rotating parts shall be accurately machined and shall be in rotational balance. Excessive vibration shall be sufficient cause for rejection of the equipment. The mass of the unit and its distribution shall be such that resonance at normal operating speeds is avoided. In any case the amplitude of vibration as measured at any point on the pumping unit shall not exceed the limits set forth in the latest edition of Indian Standards. At the operating speed, the ratio of relative speed to the critical speed of the unit or its components shall be less than 0.8 or more than 1.3.

8) Lifting chain: Each pump shall be provided with stainless steel lifting chain of suitable capacity. One end of the chain shall be attached to the pump and the other end fixed near the upper bracket for guide rail / wire rope assembly. The chain shall have SS rings fixed at an interval of about 1 meter for engaging the hook of the chain pulley block.

9) Submersible cable: Each pump shall be provided with submersible cables of equal length for power and control so that the pump positions can be interchanged with each other. The cable shall be terminated in a common weatherproof junction box.

10) Moisture sensor: The moisture sensor shall be provided in the oil chamber to detect the failure of the mechanical seal.

11) Motor: The motor shall be integral part of the pump. The enclosure for motor shall be IP-68. Each phase of the motors shall be provided with thermistor. The motor winding shall be suitable for star delta/soft starter. The motor shall be designed for minimum 10 starts/stops per hour, irrespective of whether it is DOL start or otherwise. For other requirements refer subsection VI. The motor shall operate satisfactorily at all operating levels in wet well.

12) Materials of construction: Pump casing : CI IS:210 Gr FG 260 Discharge casing : CI IS : 210 Gr FG 260 Impeller : CF 8M or SS316 Shaft : SS AISI 431 Mechanical Seal : Silicon Carbide Fasteners : BHTS

13) Protective Coating: The pumps shall be epoxy painted.

Supply, Installation, Erection and commissioning of Star Delta Starter for 7.5HP Submersible pump specially designed for sewage application with Phase failure sensing, float sensor for level monitoring, seal failure monitoring etc. The starter shall have the below mentioned specifications.

(b) Pump Monitoring Unit: In this unit two types of protections are to be incorporated. Water level controller, which controls the level of the water/liquid. It shall be provided with two electrodes, one shall be provided at high level of the water/liquid and other shall be provided at low level of the water/liquid inside the sump. When liquid in the sump touches high-level electrode relay in the unit shall be energised. The relay shall remain energised till the level of the liquid in the sump falls below the low-level electrodes. When liquid leaves the low-level electrode, pump shall stop working. The system shall also had additional Horizontal mount ball float for low and high level sensing separately with high preceision magnetic reed switch arrangements. The reed switch alerts the controller when the water level reaches low or high state in the sump for automatic pump on/off operation. Second type of protection is seal monitor relay. This relay shall works when water or moisture enters into the oil chamber, which in turn protects the pump from the damages due to the entry of the water or moisture.

(c) High Winding Temperature Trip The panel shall have provision for high temperature tripping arrangement when the temperature of motor winding exceeds 140ºC and it should reset automatically when the thermistor resets

Supply, Fabrication, Erection and Commissioning of 1no. of Outdoor Panel with Rain Guard, canopy and Double door type. The Panel construction should be suitable to fit items for 2nos of starters, MCB, LED Phase indicators with inner plate and the dimensions of panel shall be 1200Wx800Hx500D. The Panel shall be fitted with 50x50 6mm L-angle of 20 feet, suitable fixing bolts and nuts and foundation concrete arrangement. 1) Constructional Details: The panel shall be dust and vermin proof and provides degree of protection IP 50 as per IS 2147. The panel shall be made up of sheet steel of 1.6mm thick, pre treated by degreasing, derusting, phosphating etc and thereafter painted nicely with powder coating siemens grey shade as per Indian standards. All wires and links are of electric grade copper conductor.

Supply, Erection, Installation and commissioning of Automatic Pump Control unit that can automatically switch pump operation between Main & Standby Pumps. The Controller should also sense fault conditions in the starter panel and respond in switching pump operation to the standby pump.

Supply of 31/2 Core 25 Sq.mm Aluminium armoured UG Cable etc., complete.

Supply of cable glands for 31/2 Core 25Sq.mm Cable etc., complete.

Supply of End termination for 31/2 Core 25Sq.mm Cable.

Laying of 31/2 Core 25Sq.mm aluminium armoured UG Cable below ground level including earth work charges complete.

Fabrication, Delivery and erection of delivery arrangements from Submersible pump with the below mentioned items. 1) 4 inch Sluice valve of flange type handwheel operated - 3nos 2) 4 inch Non-return valve(NRV) of flange type - 3nos 3) 4 inch galvanised iron(GI) T-Joint - 2nos 4) 4 inch galvanised iron(GI) Elbow - 6nos 5) MS Threaded/Welded Flange of 16 mm thick with 8 holes of 16mm - 16nos. 6) 4 inch galvanised iron (GI) H Nipple - 4nos. 7) 4 inch B class galvanised iron (GI) pipe - 8 mtrs, 8) 6 inch to 4 inch galvanised iron (GI) reducer - 1 no., 9) 4 inch galvanised iron (GI) pipe to 6 inch 6 gauge pvc pipe fitting - 1 set 10) 6 inch 6 gauge Pvc pipe - 15 length 11) 6 inch PVC coupling - 15nos. 12) 6 inch elbow - 2nos.

Supply, Delivery and Installation of 100mm dia (4 inch) Sluice valve of flange type handwheel operated made of ductile iron material.

Supply, Delivery and Installation of 100mm dia (4 inch) Non-Return valve (NRV) of flange type made of Ductile Iron material

Supply, Delivery and Installation of 100mm dia (4 inch) galvanised iron (GI) TEE Joint

Supply, Delivery and Installation of 100mm dia (4 inch) galvanised iron (GI) Elbow.

Supply, Delivery and Installation of MS Threaded / Welded Flange of 16mm thick with 8 holes of 16mm dia etc., complete.

Supply, Delivery and Installation of 4 inch galvanised iron (GI) H Nipple.

Supply, Delivery and Installation of 100mm dia (4 inch) C class galvanised iron (GI) pipe.

Supply, Delivery and Installation of 150mm x 100mm dia (6 inch to 4 inch) galvanised iron (GI) Reducer.

Supply, Delivery and Installation of 100mm dia (4 inch) galvanised iron (GI) Pipe to 6 inch 6 gauge pvc pipe fitting.

Supply, Delivery and Installation of 160mm dia (6 inch) 10kg Pvc pipe.

Supply, Delivery and Installation of 160mm dia (6 inch) PVC Coupling.

Supply, Delivery and Installation of 160mm dia (6 inch) Elbow.

Labour for cutting open BT Roads (or) Maccadam Roads road for water mains or sewer.

Lowering of 160mm dia PVC Pipes and specials to trench and laying to proper grade and alignment, jointing with PVC couplers with cement paste.

Fabrication, Delivery and erection of Pump and valve resting from the ground with the below arrangements. 1) MS L angle 35x5 type - 150 kgs 2) MS L angle 50x6 type - 65 kgs 3) MS 100x50 H-Channel - 210 kgs 4) MS 12 mm round rod - 130 kgs

Fabrication, Delivery and erection of closed grill structure for the sewage tank with 3sets of manual door opening arrangement. The Structure shall be painted with red oxide coating.

Earth work excavation and depositing on bank with initial lead and lift as initial of 10 M and lift of 2 M in narrow trenches for laying of pipes for water supply works in Hard stiff clay, stiff black cotton, hard red earth shales, murram gravel, stoney earth and earth mixed with small size boulders and hard gravel soil including refilling the sides of foundation in layer of 15m thick watering ramming depositing the surplus earth in the premises as directed by the departmental officers etc., complete complying with standard specification.

Supply and delivery of 160mm dia PVC pipes 6Kg/cm² as per standard specification.

Lowering of 160mm dia PVC rigid pipes and specials to trench and laying to proper grade and alignment jointing with PVC couplers with cement paste and testing to the required pressure including conveyance of water for filling during testing.

Add GST @ 18%

KANDASAMY BUILDERS