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Pumping Prescriptions

Lev Nelik
Vertical Pumps Repair Specification, Rev. 1B
For larger pumps, however, a more thorough examination, documentation and restoration of internal concentricities must be done.
temperatures of all rooms
Pumps
Let’s Add Some Thermodynamics to Hydraulics, Part 1
Engineer written chart
Pumps
Your Guide to Quelling Noise & Vibration
These issues can cause serious issues, even leading to catastrophic failure.
lev Nelik
Pumps
Troubleshooting HVAC Pumping Systems, Part 2
Columnist Lev Nelik discusses piping systems with reader Lee Ruiz.
Lev Nelik
Pumps
Learn to Repair Pumps Properly, Part 2
Lev Nelik and reader Lee Ruiz dive further into efficiency in vertical turbine pumps.

lev nelik
Pumps
Troubleshooting HVAC Pumping Systems
In his latest column, Lev Nelik covers how installation and maintenance problems in a clean water pressure boosting pumping system can cause a host of issues.
An example of pumping unit efficiency trend monitoring.
Pumps
Learn to Repair Pumps Properly
Pumping Prescriptions
Lev Nelik
Pumps
Pump Hydraulics Fundamentals: A Student’s View, Part 2
What would happen if the pump was selected not based on an incorrect system where these components were not accounted for?
Lev Nelik
Pumps
Pump Hydraulics Fundamentals: A Student’s View
Columnist Lev Nelik discusses the basics of pump hydraulics with a reader.
Sequence of what happens as a result of low flow
Pumps
Suction Parameters Relating to NPSH Issues
Columnist Lev Nelik responds to a reader question about suction specific speed.
pump curve image
Pumps
How Impeller Wear Affects the Pump Curve
Pumping Prescriptions

Lev Nelik
Pumps
How Much You Pay When a Pump Operates at Off-Peak Conditions
Pumping Prescriptions
Diagram
Pumps
Determining Static Component of System Curves
Lev Nelik responds to readers' questions related to system curves and boiler feed systems.
Pumps
Proper Gauge Positioning
Lev Nelik responds to readers' questions about calculating and estimating pipe velocity
Gauge Correction & Velocity Head Correction Can Matter
Pumps
Gauge Correction & Velocity Head Correction Can Matter
Lev Nelik responds to readers' questions about calculating and estimating pipe velocity
Calculating vs. Estimating Pipe Velocity
Pumps
Calculating vs. Estimating Pipe Velocity
Columnist Lev Nelik says it is important to know when you can use a shortcut, and when to go the long way.
Readers Respond to ‘A Step-by-Step Approach to Pump Selection’
Pumps
Readers Respond to ‘A Step-by-Step Approach to Pump Selection’
Lev Nelik explains calculations from the Moody diagram.

Pumps
A Step-by-Step Approach to Pump Selection
Consider pipe sizing and motor power requirements before picking your pump.
Energy Efficiency for River in the Desert
Pumps
Energy Efficiency for River in the Desert
Lev Nelik answers reader's question about an Israeli infrastructure water project.
Developing Water Infrastructure Project in Israel
Piping
Developing Water Infrastructure Project in Israel
Choosing fresh water or salt water for a man-made river
Pumps
Middle East: What’s New with Water Pumping Challenges in Israel?
Lev Nelik explains water distribution developments in Israel.
Valves
Pumps-to-System Control of Power Plant Boiler Feed Pumps
Dr. Nelik and other experts make recommendations for an engineer in a Middle Eastern plant.

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