Pumps Essay Example | Topics and Well Written Essays - 2750 words

Pumps - Essay Example Identify typical applications stating the advantages and disadvantages for each of the following pump types: i. Single stage horizontal vertical split centrifugal This is a horizontal, single-stage, double volute axially split case centrifugal pump. The suction nozzle and the discharge nozzle which are cast intergrally and the nozzle is configured side by side. APPLICATIONS The single stage horizontal split centrifugal pump is used for different purpoases in different fileds, some of which are: i. The single stage horizontal split centrifugal pumps are broadly used in the fire systems. ii. They are used to a greater extent in oil refining. iii. Petrochemical. iv. Sugar Industry water supply system. v. Paper Industry water supply system. vi. They are used in pipelines for long distance pumping of fluids. vii. Power Generation. viii. They can be used in cycling use of water in air-conditioning ix. They are used in mining industry. x. They are also used in pressurized water transportati on in the waterworks. ADVANTAGES The single stage horizontal split centrifugal pumps have the following distinct advantages: i. Horizontally split casing, double volute minimizes thrust loads and therefore allow for operation over a wide range of capacities. ii. It is a high efficiency design compared to the other designs. iii. It has enclosed impellers and double suction which provides the hydraulic balance and therefore eliminating the axial thrust. iv. It is capable of a clockwise or counter clockwise rotation. v. It has a compact structure which therefore makes it to be space efficient. vi. The pump has an axial which is small in size with little vibration and therefore low noise. vii. They are normally easy to service viii. Horizontal Split Case, can be mounted vertically which also contributes to the efficient use of space and allows flexibility while fitting the pump. DISADVANTAGES i. These pumps are non-self-priming and therefore they are prone to cavitation which therefore necessitates manual priming making its use tedious. ii. There is a high tendency of corrosion inside this pump which is caused by the fluid properties of the fluid pumped. iii. There is a risk of impeller wear which is worsened by presence of suspended solids in the fluid being pumped. iv. There may occur overheating as a resukt of low flow of the fluid in the pump and this usually affects its efficiency v. There is a tendency for leakage to occur along the rotating shaft. b) Horizontal split double suction centrifugal These are pumps that usually have a horizontal pump shaft and with the impeller usually located at the center of the shaft and with a self-contained combination bearing housing with a seal chamber on both impeller sides. Without causing disturbance to the motor or the pipe-work, the split case construction ensures the pump can be set apart in a horizontal plane along the drive shaft.   APPLICATIONS The horizontal split double suction pumps are typically designed for liquid transfer and for circulation of the cold clean or for slightly polluted water. The most common applications include; i. They are used for general purpose pumping ii. The horizontal split double suction centrifugal pumps can be used for air conditioning. iii. They can also be used in cooling towers. iv. The double suction pumps can be used in irrigation and drainage pumping stations.