how to determine root cause of excessive pump

How to Repair Fuel Pump Assembly

Understanding the root cause of technician diagnostic errors is the first step to successfully managing fuel system parts purchases and returns a fuel pressure gauge should be used to determine if the pump is operating and if it's delivering the correct fuel pump pressure Noise may sometimes be an indication of excessive pump wear

The Cost of a Misbehaving Pump

2020-7-1The pump operation at 850 rpm is displayed in Image 1 Reducing Operating Costs Notice on the pump curve that with the pump operating at 1 750 rpm the pump produces approximately 145 feet of head with a flow system flow rate of 2 800 gpm The pump operating at this flow rate requires approximately 170 hp

5 Reasons To Choose A Positive Displacement Pump

Oftentimes a centrifugal pump is run off its BEP when a lower flow is desired much to the pump's detriment If you read our previous post "How To Read a Centrifugal Pump Curve" you'll recall that running a centrifugal off its BEP can cause excessive energy consumption damage to the pump and overall poor performance

The Five Whys of Equipment Failure

The five whys refers to the practice of asking five times why a motor failure occurred in order to get closer to the root cause of the problem Failure to determine the root cause can result in treating the symptoms of the problem instead of its cause in which case you will

Centrifugal Pump Vibrations

2019-10-30You can't run a pump with suction and discharge valves closed! Minimum Flow 1750 rpm 15-20% BEP Flow 3500 rpm 30-50% BEP Flow Maximum Flow 110-115% BEP Flow Speed Suction Pipe Immersion EASTMAN Avoid Max Size Impellers Conclusions EASTMAN Avoid Max Size Impellers Keep speed to 1750 max Conclusions

Noisy Vibrating Centrifugal Pump? Maybe The Pump

2020-8-15When a centrifugal pump stops delivering sufficient pressure breaks down frequently or vibrates at high levels it's easy to blame the pump Frequently system problems are misdiagnosed as pump problems because the pump is the one making the noise or underperforming

Checklist of Problems vvith Centrifugal Pumps and their

2017-8-257 Excessive amount of air or gas entrained in pumped liquid B Excessive leakage through wearing rings or other sealing faces 9 Viscosity of liquid higher than that for which pump has been designated 10 Impeller or casing partially clogged with solid matter 11 Fins burrs or sharp edges in path of liquid 12 Impeller damaged 13

Succeed at Vacuum System TROUBLESHOOTING

2020-5-26vacuum pump as the root cause of the problem However the vacuum pump usually isn't culprit In almost all cases either: 1) the pump is being operated in a condition for which it never was intended 2) one or more of the user's interface points with the pump (suction/discharge lines water supply process contaminant etc ) are be-

How to Determine Root Cause of Excessive Pump

How to Determine Root Cause of Excessive Pump Vibration Excessive vibration is a good indicator that some damaging phenomenon could be occurring within a pump or the immediate pump system which is why many pump users monitor pump vibration on a regular basis Jun 1st 2012

Symptoms of Common Hydraulic Problems and Their

2020-8-17Proactive maintenance emphasizes the routine detection and correction of root cause conditions that would otherwise lead to equipment failure In the case of hydraulic systems there are three easily detectable symptoms that give early warning of root cause conditions These symptoms are abnormal noise high fluid temperature and slow operation

Practical Considerations in Pump Suction Arrangements

2012-5-29Improper design of the suction piping or sump or inadequate pipe support exterior to the pump can cause hydraulic disturbances that manifest in chronic and eventual destructive random frequency vibrations Interestingly enough internal pump problems such as bearing failures seal failures excessive erosion

How to Repair Fuel Pump Assembly

Understanding the root cause of technician diagnostic errors is the first step to successfully managing fuel system parts purchases and returns a fuel pressure gauge should be used to determine if the pump is operating and if it's delivering the correct fuel pump pressure Noise may sometimes be an indication of excessive pump wear

What Causes Noise?

2016-3-10pump noise as well as increased vibration Other features in the well can cause turbulence such as mixers Excessive Velocity – Water moving through a system especially at higher than recommended velocity may cause noise generated by a resonant frequency Mechanical Noise Bearings – The pump may be experiencing a bearing failure

Vibration Study and Root Cause Analysis

2018-1-9When it comes to flow-related pump problems there are a number of potential causes: cavitation air entrapment suction/discharge recirculation to name a few As reliability professionals our customers rely on us to determine the root cause of the problem and create an actionable diagnosis Gauges are one of the best yet often overlooked tools available

Practical Considerations in Pump Suction Arrangements

2012-5-29Improper design of the suction piping or sump or inadequate pipe support exterior to the pump can cause hydraulic disturbances that manifest in chronic and eventual destructive random frequency vibrations Interestingly enough internal pump problems such as bearing failures seal failures excessive erosion

Addressing root causes of excessive overtime

2020-8-15Root causes for excessive overtime can be traced back to a lack of policies and procedures related to hours of work and poor planning and time management at the brand and/or factory level Evidence from assessments and field reports over the years have shown that excessive overtime is hazardous to workers and can limit productivity at the

Advanced Vibration Analysis Case Study

2020-8-15Advanced vibration analysis was performed on the blower and supporting base structure to determine the root cause of the elevated vibration levels that were affecting this equipment Bump Testing A bump test was performed to determine the natural frequencies of the base structure and ensure that these frequencies were not within 10% of any

6 Reasons Why Pool Pump Making Loud Humming

6 Pump Flow Pulsation It's a really not too good for a pump to be operating near its shut-off head This occurs when the pump runs with the discharged valve closed If this happens for too long pump flow pulsation occurs thereby leading to vibration of the pump Of all the major causes of pulsation the lack of proper feed is a major one

Pumps 101: Operation Maintenance and Monitoring Basics

2012-8-31pump needs It's also possible for a pump that is perfectly suited to its first installation to become oversized or undersized as the demands of the process change When a pump operates too far off BEP forces inside the pump become imbalanced which can cause parts to

Vickers Pump Failure Analysis 1

2013-10-16This creates a chain reaction Therefore the root cause of excessive heat must be eliminated in order to effectively cure the problem Implosion: A sudden violent Inward collapse Implosion of air bubbles when subjected to hydraulic system pressure This can cause severe pump

Research on Centrifugal Pumps Vibration–Causes and

The vibration not only causes excessive leakage but also causes wear in sleeve and shaft The vibration gives high friction leading to excessive heat dissipation So additional flushing will be needed to control the heat dissipated in the pump Bearings: The load from axial and radial movement are handled by

8 Reasons Your Centrifugal Pump Has Low Flow

2020-8-15Same with the wear ring and wear plate When clearances open up due to wear more recirculation occurs inside the pump reducing the pump's flow Excessive Clearances: If clearances are too wide for the type of fluid pumped excessive slip will occur Fluid will continue to recirculate inside the pump yielding lower flow out of the pump

Troubleshooting Root Cause Analysis (RCA)

2020-8-18A Root Cause Analysis (RCA) can be conducted when a more formal approach is needed for failure assessment where the goal is to prevent recurrence by addressing the root cause of a problem RCA is typically used as a reactive method of identifying

What Causes Noise?

2016-3-10pump noise as well as increased vibration Other features in the well can cause turbulence such as mixers Excessive Velocity – Water moving through a system especially at higher than recommended velocity may cause noise generated by a resonant frequency Mechanical Noise Bearings – The pump may be experiencing a bearing failure

Case Study

2020-8-15Root Cause Analysis of Pump Rotor Failures Impact testing was used to determine the reasons for three failures of a hydrocarbon cracking pump which was critical to a diesel fuel production process at a major California refinery Each failure closed down or severely curtailed fuel production at the refinery at an average cost of about $3/4

The "Seven Cause Category Approach" to Root

1999-1-1Considerable involvement with pump maintenance and repair would lead us to estimate a failure cause distribution for centrifugal pumps in U S process plants as shown in Table 10-1 Our failure analysis and troubleshooting approach attempts to focus on the estimated cause distribution for a given machine type or equipment family

Pump Troubleshooting

2020-8-19This creates an imbalance of the liquid in the pump casing that can cause an excessive axial thrust to be imposed on the impeller Figure 1 The normal outcome of such an arrangement is a consistently frequent failure of the mechanical seal or bearing (when packing is fitted) at the end of the shaft closest to the suction source

A Heat Treater's Guide to Common Furnace

If the pumping system is operating correctly then one of these failure modes is likely the cause: a damaged door seal vacuum furnace leaks and/or hot-zone contamination The door seal on a vacuum furnace sees some of the highest wear-and-tear through normal operation As such it tends to be the cause of pump-down issues about 80% of the time

Causes effects and prevention of bearing failures

Bearing distributors' account representatives are trained in performing root cause analysis to identify solutions for preventing premature bearing failures A portion of this analysis is a review of annual or semi-annual detailed purchase history that should bring up any abnormally high usage items and commit to assisting in reducing consumption