NESSA ENTERPRISES PVT LTD Ram Nagar, Coimbatore, Tamil Nadu

Vertical Openwell Submersible Pumps - CVS Series These centrifugal pumps are ideally suitable for openwells or tanks where there is a wide fluctuation in water level. This works under water and it rests at bottom of the well. Hence suction and priming problem do not arise. Pump's volute chamber is designed to give the best possible hydraulic efficiency. Dynamically balanced impeller offers vibration free operation with long life. Prime mover is rewindable, water - cooled motor. Specially designed water lubricated bearings are used to withstand axial thrust loads with minimum wear and tear. The stator is wound with special water proof synthetic film insulated copper winding wires and made up of low watt loss steel laminations assembled under pressure and rigidly locked in stainless steel stator shell.     Features SS and carbon thrust bearings used in vertical openwell sub Bronze impeller in specific models Specially designed journal bushes for better cooling effect Intended for wide voltage fluctuations High operating efficiency Detachable pump and motor in vertical higher stage pump

Vertical Openwell Submersible Pumps - CVS Series These centrifugal pumps are ideally suitable for openwells or tanks where there is a wide fluctuation in water level. This works under water and it rests at bottom of the well. Hence suction and priming problem do not arise. Pump's volute chamber is designed to give the best possible hydraulic efficiency. Dynamically balanced impeller offers vibration free operation with long life. Prime mover is rewindable, water - cooled motor. Specially designed water lubricated bearings are used to withstand axial thrust loads with minimum wear and tear. The stator is wound with special water proof synthetic film insulated copper winding wires and made up of low watt loss steel laminations assembled under pressure and rigidly locked in stainless steel stator shell.   Features     SS and carbon thrust bearings used in vertical openwell sub Bronze impeller in specific models Specially designed journal bushes for better cooling effect Intended for wide voltage fluctuations High operating efficiency Detachable pump and motor in vertical higher stage pump

Regenerative Monoset Pumps - ARM & ASM series C.R.I. Regenerative monoset pump's volute chamber and impellers are designed to give the best possible hydraulic efficiency and suction lift characteristics. Sealing is by means of a bellows mechanical seal made of carbon and ceramic is fitted over the shaft, which is ground to close tolerance. These pumps are power-driven by a totally enclosed fan cooled A.C. induction two-pole and four pole motor, suitable for continuous duty. Motor stator is made of low watt loss silicon steel laminations assembled under pressure and rigidly locked in the frame. Dynamically balanced rotor ensures vibration free and noise free operations and increase the life of the bearings and seal.   Features     Fitted with imported motor protector in two pole motors Intended for wide voltage fluctuations Sturdy and compact Back pull out type in specific models.

Power : 0.37kW – 0.75 kW (0.5HP& 1HP)  

Regenerative Monoblock Pumps - NR & ENR series C.R.I. Regenerative monoset pump's volute chamber and impellers are designed to give the best possible hydraulic efficiency and suction lift characteristics. Sealing is by means of a bellows mechanical seal made of carbon and ceramic is fitted over the shaft, which is ground to close tolerance. These pumps are power-driven by a totally enclosed fan cooled A.C. induction two-Pole motor, suitable for continuous duty. Motor stator is made of low watt loss silicon steel laminations assembled under pressure and rigidly locked in the frame. Dynamically balanced rotor ensures vibration free and noise free operations and increase the life of the bearings and seal.   Features     Built-in with imported motor protector Intended for wide voltage fluctuations Powder coated stator body Sturdy and compact Double sealed ball bearing

Rated Power : 0.185kW – 0.75 kW (0.25HP-1HP)  

Horizontal Openwell Submersible Pumps - CSS & CSM Series These centrifugal pumps are ideally suitable for openwells or tanks where there is a wide fluctuation in water level. This works under water and it rests at bottom of the well. Hence suction and priming problem do not arise. Pump’s volute chamber is designed to give the best possible hydraulic efficiency. Dynamically balanced impeller offers vibration free operation with long life. Prime mover is rewindable, water-cooled motor. Specially designed water lubricated bearings are used to withstand axial thrust loads with minimum wear and tear. The stator is wound with special water proof synthetic film insulated copper winding wires and made up of low watt loss steel laminations assembled under pressure and rigidly locked in stainless steel stator shell.     Features    SS and carbon thrust bearings used in vertical openwell sub  Bronze impeller in specific models  Specially designed journal bushes for better cooling effect  Designed for extensive voltage fluctuations  High operating efficiency  Detachable pump and motor in vertical higher stage pump

Foot Valves C.R.I. energy efficient frictionless Foot Valves and Reflux Valves are basically swing type Non Return Valves. Foot Valves are available in screwed type construction and Reflux Valves have threaded portions at both the ends. They are specially designed to give an unrestricted smooth flow of water and thus to reduce the frictional losses to a minimum. The C.R.I. frictionless Foot Valve has 'K' value less than 0.8 and 'K' value for Reflux Valves are less than 0.5. Thereby it reduces additional load on prime mover and also gives more discharge. Foot Valve is placed at the lower end of the suction pipe of a centrifugal end suction pumpset to retain water in the pumpset casing and suction pipe to keep the pumpsets always in priming condition. Reflux and Non Return Valves are fitted generally in the delivery pipeline to avoid water hammer, up thrust and backspin effects in the pumping system. These can also be used anywhere in the suction line of which the bottom end is entered into a bore pipe or tube well. The pressure withstanding capacity of Reflux Valve and Non Return Valve are 1 bar and 15 bar respectively     Features        Suction path is almost straight to the pipe and hence frictional loss is very less.  Natural rubber flap totally prevents water leakage  Ruggedly built with graded cast Iron  Compact design and easy to install  Metal parts of Foot Valves are coated with bituminous paint to avoid rust formation  It increases water discharge upto 20% and reduces energy consumption upto 10%

Centrifugal Monoblock Pumps - ACM Series C.R.I. Centrifugal monoblock pump's volute chamber and impellers are designed to give the best possible hydraulic efficiency and good suction lift. Sealing is by means of a bellows mechanical seal made of carbon & ceramic is fitted over the shaft ,which is ground to close tolerance. These pumps are power-driven by a totally enclosed fan cooled A.C. Induction two pole motor. Motor stator is made of low watt loss silicon steel laminations assembled under pressure and rigidly locked in the frame.     Features     High operating efficiency resulting lower power consumption Dynamically balanced rotating parts Intended for wide voltage fluctuations Back pull out design for easy maintenance Single- phase motor is incorporated with imported motor protector

Centrifugal Monoblock Pumps - CH, CS, BP SERIES C.R.I. Centrifugal monoblock pump’s volute chamber and impellers are designed to give the best possible hydraulic efficiency and good suction lift characteristics. Most modern and highly sophisticated machinery and technology are employed in the manufacture of these pumps using quality raw materials. Dynamically balanced impellers and rotors are ensuring the long life of the pump. These pumps are powered by a totally enclosed fan cooled A.C. Induction two pole motor or four pole motor is suitable for continuous duty . Motor stator is made of low watt loss silicon steel laminations assembled under pressure and rigidly locked in the frame.   Features      Single shaft for motor and pump ensures good mechanical strength  Dynamically balanced rotating parts such as impeller and rotor  Bronze impeller in specific models  Taper roller bearing in higher HP pumps  Graphite coated asbestos packing rope is used to increase bush life  Monoblock with extension shaft in specific models

Degree of Protection : IP 44

Class Of Insulation : A, E,& B

Direction Of Rotation : Clockwise viewed from Driving end

Type Of Duty : S1 (Continuous)

Centrifugal Jet Self Priming Pumps - CJS Series C.R.I. Centrifugal Jet self priming pumpsets pump casing and ejector unit are designed carefully to give the best possible hydraulic efficiency and suction lift characteristics. Sealing is by means of a bellow mechanical seal made of carbon & ceramic is fitted over the shaft, which is ground to close tolerance. Most modern and highly sophisticated machinery and technology are employed in the manufacturing of these pumpsets using quality raw materials, dynamically balanced impellers and rotors to ensure long life. These pumpsets are powered by a totally enclosed fan cooled. AC induction motor, suitable for continuous duty. Motor stator is made of low watt loss steel laminations assembled under pressure and rigidly locked in the frame.   Features     Built-in with imported motor protector Intended for wide voltage fluctuations Powder coated stator body Sturdy and compact Double sealed ball bearing

Direction Of Rotation : Clockwise viewed from driving end

Class Of Insulation : B

Type Of Duty : S1 (Continuous)

C.R.I. three core flat cables conform to IS: 694. High conductivity annealed and bunched flexible copper conductors are made from electrolytic bright copper twisted together and insulated with colour coded special grade waterproof flexible PVC compound. The final protection of outer sheath is made from high grade flexible PVC / Rubber compound impervious to water, grease, oil etc, thereby it ensures long life and has good withstanding capacity to high voltage and current. These cables are sequentially marked at one metre intervals for convenience. Available nominal size in square milli meters are - 1.5, 2.5, 4, 6, 10 & 16 (Packing – 300, 500 & 1000 metres in wooden drums).  

Insulation Material : Flexible water proof PVC

C.R.I. 80 mm (3") Submersible pumpsets are built with thermoplastic impellers, diffusers and inbuilt check valve. All vital components of these pumpsets are made of corrosion resistant thermoplastic and the shaft is of SS 304/410. Pumpsets are multistage centrifugal type. The optimal design of impellers and diffusers enables the best possible hydraulic efficiency. The pumpset is firmly coupled to a submersible electric motor which operates submerged beneath the surface of water. Built-in check valve prevents back flow and reduces the risk of water hammering. All mounting dimension of 100 mm (4”) pumpsets and motors upto 2 HP are in accordance with NEMA standard.   FEATURE  Built-in with imported motor protector  Silver brazed rotor  Intended for wide voltage fluctuations  Water –cooled rewindable motor  Low maintenance cost  

250 mm (10") Borewell Submersible Pumps - CM Series C.R.I. 250 mm (10") Borewell Submersible pumpset is made with different materials of construction together with extremely tough hardwearing bushes which make this pumpset highly durable. This pumpset is supplied with stainless steel & LTB-2 impellers to give better performance and longer life. The optimal design of impellers and diffusers offers best possible hydraulic efficiency. This pumpset is powered by a water filled, rewindable submersible motor, which is suitable for continuous duty. The stator is wound with special waterproof synthetic film insulated copper winding wires and made up of low watt loss silicon steel laminations assembled under pressure and rigidly locked in stainless steel stator shell. Specially designed thrust bearings (SS AISI – 420 with Graphite Carbon) are used to withstand axial and down thrust loads with minimum wear and tear. Dynamically balanced rotor gives vibration free and noise free operation, thereby increases efficiency and life cycle of the motor.   Features      Pumps are designed to give more discharge  Extremely hard wearing water – lubricated bearings  Designed for extensive voltage fluctuations  Silver brazed rotor  6” motor and 8” pump combination on request

C.R.I.Air valve is connected with delivery pipeline to eliminate the trapped air in the system. Normally in horizontal pipeline, due to un-evenness in ground level, there will be an entry of air into the pipeline it results in pipe damages. Air valves are installed in the pipelines.   Features    Metal parts of air valve is coated with epoxy paint to avoid rust formation Double acting air valve in specific sizes Rubber washer is made up of synthetic rubber for Long life.