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PUMP CONDITION EVALUATION

This document outlines essential procedures for evaluating the condition of pumps, focusing on key components like bearings, pump shafts, bearing frames, rear covers, impellers, and pump cases. It details the importance of checking for vibration imperfections, end play, and run-out tolerances to ensure optimal pump performance. Key measurements such as Total Indicator Reading (TIR) for bearings and shafts are specified, along with the significance of proper fit and perpendicularity in components. Following these evaluations can prevent failures and enhance pump reliability.

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PUMP CONDITION EVALUATION

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  1. PUMP CONDITION EVALUATION

  2. PUMP CONDITION EVALUATION • BEARINGS • PUMP SHAFT • BEARING FRAME • REAR COVER • IMPELLER • PUMP CASE

  3. PUMP CONDITION EVALUATION • BEARINGS • Vibration - Imperfections on rollers/balls will cause seal face “chatter” • End Play - Closing force on the seal faces will vary • Run Out • Seal faces will not run in a concentric path • Seal faces will not run parallel • Vibration will occur

  4. CHECKING BEARING RELATED END PLAY Total Indicator Reading should not exceed .010”

  5. CHECKING BEARING RELATED END PLAY “TIR” should not exceed .010”

  6. CHECKING BEARING RELATED RUN OUT TIR should not exceed .002”

  7. CHECKING BEARING RELATED RUN OUT “TIR” should not exceed .002”

  8. PUMP CONDITION EVALUATION • PUMP SHAFT • Bent Shaft • Run Out • Vibration • Bearing Fits • Run Out • End Play • Shaft Sleeve Fit - Run Out • Impeller Thread/Fit - Vibration

  9. 6” = TIR max of .003 CHECKING SHAFT RELATED RUN OUT “TIR” should not exceed .001” per 2” distance from bearing

  10. 3” = TIR .0015 CHECKING SHAFT RELATED RUN OUT TIR should not exceed .001” per 2” distance from bearing

  11. PUMP CONDITION EVALUATION • BEARING FRAME • Outboard Bearing Housing fit in Frame • Bearing Fits • Run Out • Bearing Spin • Vibration

  12. PUMP CONDITION EVALUATION • REAR COVER • Seal chamber / Gland fit - Gland Boss must be perpendicular to the pump shaft • Imperfections or wear on the impeller side of the rear cover will effect the performance of pump out vanes which in turn, effects seal chamber conditions • Stuffing box pressure • fluid turbulence

  13. CHECKING GLAND BOSS FOR PERPENDICULARITY “TIR” should not exceed .005” up to 5” Dia. (+.001"/in. >5”)

  14. PUMP CONDITION EVALUATION • IMPELLER & PUMP CASE • Excessive wear will effect pump performance which will effect stuffing box conditions • Impeller fit on shaft must be true • With open impeller pumps, proper impeller / case clearance is a must for optimum pump performance and must be done before installing a new seal

  15. ENDPUMP CONDITION EVALUATION

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