Updated 1 month ago
By Maria Rodriguez
Safety Warning
- Ensure equipment is properly isolated and locked out/tagged out
- Verify zero energy state before beginning work
- Use proper lifting equipment and techniques for heavy components
- Be aware of potential hazardous material exposure from pump internals
Equipment Information
This SOP applies to the following equipment
Equipment Type
Centrifugal Pump
Applicable Models
Flowserve, Sulzer, KSB, Grundfos
1
Preparation and Isolation
Safely isolate and prepare the pump for maintenance
30-45 minutes
Tools: Lockout/tagout kit, Drain containment system, Work permits, Safety barriers
- Obtain necessary work permits (hot work, confined space if applicable)
- Isolate pump by closing suction and discharge valves
- Lock out and tag out electrical power to pump motor
- Depressurize and drain pump casing to safe containment
2
Disassembly
Systematically disassemble the pump for inspection
2-3 hours
Tools: Torque wrench, Bearing puller, Seal removal tools, Lifting equipment
- Remove coupling guard and disconnect coupling
- Remove bearing housing covers and extract bearings
- Remove mechanical seal or packing gland
- Remove casing bolts and separate pump casing from frame
3
Inspection
Thoroughly inspect all components for wear and damage
1-2 hours
Tools: Dial indicator, Micrometers, Inspection checklist, Digital camera
- Measure and record shaft runout and bearing housing bore dimensions
- Inspect impeller for erosion, corrosion, or damage
- Check mechanical seal faces for wear or damage
- Inspect casing for signs of erosion, corrosion, or cracking
4
Parts Replacement
Replace worn or damaged components
1-2 hours
Tools: Bearing installation tools, Seal installation tools, Torque wrench, Alignment tools
- Replace bearings according to maintenance schedule or condition
- Replace mechanical seal or packing as required
- Replace worn wear rings or impeller if necessary
- Replace gaskets and O-rings with new components
5
Reassembly
Carefully reassemble the pump in the correct sequence
2-3 hours
Tools: Torque wrench, Feeler gauges, Alignment tools, Lubricants
- Install impeller and set proper clearances
- Install mechanical seal according to manufacturer's instructions
- Reassemble pump casing with new gaskets
- Install and properly lubricate bearings
6
Alignment and Testing
Ensure proper alignment and test pump operation
1-2 hours
Tools: Laser alignment tool, Dial indicators, Vibration analyzer, Pressure gauges
- Align pump and motor coupling to within specifications
- Reconnect coupling and install coupling guard
- Remove lockout/tagout devices and prepare for startup
- Perform startup checks and monitor for proper operation