This document outlines 10 ways to damage or destroy centrifugal pumps, presented as a crime scene investigation. It describes causes of damage such as cavitation from low pressure, operating outside design conditions, abrasive fluids, misalignment stressing pump components, chemical incompatibility, moisture in lubricants, excessive heat from shut-off or recirculation, fluid contamination, vibration, and neglecting maintenance. Proper installation, operation within design ranges, fluid compatibility, and routine maintenance are recommended to prevent premature pump failure.
Remso emergency top purging lance system, One lance carriage driven by chain system, Vertical_swivelling column, Local or remote control System, top lance, Lance storage, Automatic start of gas purging when lowering the lance, Multi Lance Manipulator, Measurement and Control Technology, carbon lance, oxygen lance, lance stirring system, bottom pouring lance, top lance, emergency lance, Multi Lance Manipulator, Temperature and sampler Lance Manipulator,
Temperature and sampler Lance system, Multi-function top-blown oxygen lance for hot metal vacuum refining
Remso emergency top purging lance system, One lance carriage driven by chain system, Vertical_swivelling column, Local or remote control System, top lance, Lance storage, Automatic start of gas purging when lowering the lance, Multi Lance Manipulator, Measurement and Control Technology, carbon lance, oxygen lance, lance stirring system, bottom pouring lance, top lance, emergency lance, Multi Lance Manipulator, Temperature and sampler Lance Manipulator,
Temperature and sampler Lance system, Multi-function top-blown oxygen lance for hot metal vacuum refining
To analyse the evolution of the product ; suitable for liquids, liquids mixed with solids or powders.
To avoid product contamination by another agent
DN25 to DN50
1" à 2"
PN10 to PN50
150 to 300 lbs
Setpoint Integrated Solutions is an industry leader in applying Control Valve solutions across industry segments.
Brannon Gant - Regional Sales Manager
Anivarya Pumps offers heavy duty gear pumps which is useful for pumping and transferring of heavy fuel oils. Generally made of iron Gear pumps are also available
in cast steel, stainless steel.
WOM Group Manufacturers Floating Ball Valve with advanced technology. WOM’s Floating Ball Valves provide the user with an exceedingly reliable and proven design offering maximum sealing against leaks.
WOM’s Floating Ball Valves provide the user with an exceedingly reliable and proven design offering maximum sealing against leaks. WOM’s Floating Ball Valves have separate ball and stem design with a free floating ball preloaded between the seats during assembly.
WOM Group provides Floating Ball Valves with an exceedingly reliable and proven design offering maximum sealing against leaks. They have separate ball and stem design with a free floating ball preloaded between the seats during assembly.
To analyse the evolution of the product ; suitable for liquids, liquids mixed with solids or powders.
To avoid product contamination by another agent
DN25 to DN50
1" à 2"
PN10 to PN50
150 to 300 lbs
Setpoint Integrated Solutions is an industry leader in applying Control Valve solutions across industry segments.
Brannon Gant - Regional Sales Manager
Anivarya Pumps offers heavy duty gear pumps which is useful for pumping and transferring of heavy fuel oils. Generally made of iron Gear pumps are also available
in cast steel, stainless steel.
WOM Group Manufacturers Floating Ball Valve with advanced technology. WOM’s Floating Ball Valves provide the user with an exceedingly reliable and proven design offering maximum sealing against leaks.
WOM’s Floating Ball Valves provide the user with an exceedingly reliable and proven design offering maximum sealing against leaks. WOM’s Floating Ball Valves have separate ball and stem design with a free floating ball preloaded between the seats during assembly.
WOM Group provides Floating Ball Valves with an exceedingly reliable and proven design offering maximum sealing against leaks. They have separate ball and stem design with a free floating ball preloaded between the seats during assembly.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
5. TYPICAL CENTRIFUGAL PUMP
HYDRAULIC BALANCE
A - Suction (low P, low V)
B - Eye of Impeller (low P, low V)
C - Vanes of Impeller (increasing
P, high V)
D - Volute (high P, low V)
E - Discharge (high P, low V)
6. PUMP RELIABILITY – BEST PRACTICE
High
Temperature
Rise
Low
Flow
Cavitation
Lower
Impeller Life
Discharge
Recirculation
Suction
Recirculation
Low Bearing &
Low Seal Life
Low Bearing &
Low Seal Life
Cavitation
%
Head
% Flow
Pump Curve
Best
Efficiency
Point
7. EVIDENCE: DISCHARGE CAVITATION
• Pitting on vane tips.
• Fluid vaporizes due to low
pressure condition.
• Vapour condenses on the surface
of the impeller like a mini
implosion.
• Recirculation, operating near
shut-off.
8. EVIDENCE: SUCTION CAVITATION
• Pitting on impeller vane –
suction side.
• Fluid vaporizes due to low
suction pressure.
• Vapour condenses on the
surface of the impeller like
a mini implosion.
• Low suctions pressure,
operating near run-out.
9. EVIDENCE: SHAFT BREAKAGE
Radial Fatigue Break
• Total Dynamic Head Too High
• Dead Head
• Air Entrainment (Hydraulic Imbalance)
• Mechanical Imbalance
Torsional Break (twisting)
• Pump Lock-up
• Reverse Rotation
• Short Cycling
10. #1 - STARVED TO DEATH
Insufficient NPSHA
• Restricting the suction line
• Lowing the fluid level in the supply source
Run Dry operation
• Mechanical seal thermal shock
• Poor cooling of rotating components - Thermal expansion
Lack of seal flush
Lack of lubricant
Indicators
• Audible cavitation – collapse of vapour causing erosion on the impeller & cut water
• Low suction gauge pressure
11. #2 - WORK IT TO DEATH
Operating outside the allowable operating range
• Hydraulic imbalance at runout
• Cavitation
• Vibration
Running into the motor service factor
Frequent start/stop cycles
12. #3 - BEAT TO DEATH
Abrasives, Grit, Solids
• Clog or even break the pump
• Shorten life of casing, impeller, seal, wear plate/rings.
• Impeller imbalance
• Efficiency reduction
Match materials for the process fluid
• Hardened metal or rubberlined materials for abrasives
13. #4 - TOO MUCH STRESS
Pump casing deflection
• Pipe strain to pump nozzles
• Pumps do NOT support pipes/valves
• Soft foot
• Thermal expansion
Common Corrective Action
• Expansion joints
• Precision alignment
14. #5 - MARRIAGE
It’s all about compatibility
• Efficient hydraulic selection
• Incorrect style of pump
• Chemically compatible
• Proper sizing of the suction and
discharge pipe
• Piping configuration
15. #6 - DROWNING
Water in the oil
• Small amount of water in the bearing oil can drastically reduce bearing life.
• Promote oil seal leaks
Seal Flush Water Management
• Direct leakage away from the pump
• Adjust packing leakage to a minimum (1 drop/sec)
16. #7 - BOILED TO DEATH
Operating at or near shutoff.
• Excessive recirculation
• Increase internal temperature & pressure
• Radial loads – shaft deflection, reduced bearing life.
• Vibration, cavitation
• High seal temperature
Potential Sources
• Partially closed valve
• Clogged discharge line
• Upset system upstream
Pump Protection
• Heat detection and shutdown protection
• Discharge pressure monitoring & protection.
• Pressure relief device
17. #8 - POISONED
Fluid Compatibility
• Pumps are designed to handle specific fluid
properties.
• Fluid property changes can have a negative
impact on the pump. Temperature,
chemistry, density, viscosity.
Corrosive Environments
• Chlorine rich environments, salt water
environment, submersible pumps
• Heavy corrosion on pump casing & mating
surfaces
• Corrosion fatigue
18. #9 - SHAKE TO DEATH
Sources of Vibration
• Pump hydraulic selection
• Machine imbalance
• Resonance with natural frequency of the pipework
Mitigating Vibration
• Operate pump near BEP
• Proper installation – soft foot, alignment
• Anchoring & grouting to a solid foundation
• Piping support
19. #10 - NEGLECT
Follow O&M Manual maintenance inspections
Get to know your pump
Record anomalies and corrective actions
Monitor gauge readings, amp draw.
Keep the lubricates clean and at proper levels
