Earthwise Navigation

9435

Centrifugal Pumps II (Maintenance Repair)

14.0

Drinking Water and Wastewater

Industrial Trainers of America, Inc.

Bonnie Leana

bonniel@itatraining.com

717 227 8030 Ext.

Partner Website

This hands-on intensive course uses ANSI End Suction Pumps. These pumps are disassembled, inspected for wear, critical dimensions are measured and checked. The pumps are then reassembled, and impeller end clearances adjusted to manufactures specifications. The pumps are then reinstalled on their bases and precision aligned to industry specs using the Rim and Face Method. Students will also perform precision measurement of bearings, bearing fits, shafts fits, internal pump clearances, and coupling bores, as well as being able to check shafts for straightness and run out. Basic principles of centrifugal and positive displacement pumps are covered, such as Cavitation, Suction Recirculation, Net Positive Suction Head, and Vibration. The course also covers Root Cause Failure Analysis, and Troubleshooting is taught by having students examine various failed pump components such as impellers, wear rings and bearings. Performance monitoring and troubleshooting are taught by checking measurable parameters such as discharge pressure, suction pressure, and motor current. Performance of the pump is then matched to design limits and the Pump Curve becomes a valuable troubleshooting tool. Proper application and maintenance are stressed. Various sealing methods are covered, and several types of packing and mechanical seals are discussed. Proper maintenance techniques and lubrication as well as basics of electric motors, bearings, seals, and alignment are covered.

Intermediate

Day 1 ? Introduction to Centrifugal Pumps, present day and historical (1/4hr) ? Types of Centrifugal Pumps (1/4hr) ? Horizontal, ? Vertical Turbine, ? Submersible wet and dry pit types. ? Basic Hydraulic concepts explained and simplified, Specific Gravity, Head pressure vs gauge pressure, viscosity, atmospheric pressure, re-circulation, and cavitation. (1/4hr) ? Common pumping suction configurations: (1/4 hr) ? Suction Lift, ? Flooded Suction, and ? Closed Loop Systems. ? Net Positive Suction Head (NPSHA and NPSHR) are defined and explained as to how they affect cavitation. (1/2hr) ? Reading pump curves; hands on exercises (1hr) ? Electrical and Horsepower Requirements (1/2hr) ? Efficiency, Brake Horsepower, Water Horsepower and Efficiency. ? Variable Frequency Drives and their effect on pump operation, ? Affinity laws are covered. Pump RPM versus Flow, Pressure and HP Required ? Hands-on disassembly and measurement of

Water and Wastewater Operators

Classroom