1, Starting
Before starting the following steps must be taken.
2, Efficient service of pump can be obtained only by installing the pump on adequate foundations which should be designed to take all loads from the pump and motor and to absorb any vibration. All hold -down bolts should be fully tightened.
3, Pipelines and valves should be supported independently of the pump. Appropriate joint rings must be used at the pump flanges. In some pumps, the metal liner projects a short distance past the flange. Care should be taken in such instance not to over tighten the flange bolts so as to not to damage the joint rings.
4, Before use of pump, the shaft should then be rotated by hand (clockwise) to ensure that the impeller turns freely within the pump. At any sign of scraping noises from the pump, the impeller clearance must be adjusted.
5, Starting motor, check rotation and correct it if necessary to produce pump shaft rotation indicated by arrow on the pump casing. THIS IS IMPORTANT. Rotation indirection opposite to the arrow on the pump will unscrew the impeller from the shaft causing serious damage to the pump.
6, For direct coupled, the pump and motor shaft should be accurately aligned. In Vee -belt driven, the pump shaft must be paralleled with the motor shaft. The position is pulley should be adjusted in order to make it perpendicular to belt and to prevent them from excessive wear and vibration.