Columns
  Lev Nelik   August 2018 
 Pumps & Systems Looks Back: Pump Design Changes Improve Lubrication
Proper lubrication is a key to long, trouble-free life of centrifugal pump bearings. In recent years, the issue of lubrication has received renewed attention from pump users in chemical plants, pulp and paper mills, refineries and other industries.
  Jim Elsey   August 2018 
 Calculate NPSHa for a Suction Lift Condition
This is the second article in a five-part series. Read the first part of the series here.
  Ray Hardee   August 2018 
 How a Piping System Model Can Be Used in a PSM Plan
Editor’s Note: This is Part 2 of a series. Part 1, in Pumps & Systems, July 2018, introduced developing a model for process safety management (PSM).
  Lev Nelik   July 2018 
 Energy Efficiency for River in the Desert
I have received a lot of feedback from our readers on Part 1 of this article from the May issue of Pumps & Systems. One reader writes:
  Jim Elsey   July 2018 
 Step by Step Calculation of NPSHa
This is the first article in a five-part series.
In the world of psychology and specifically in the area of introspective issues, it is often declared that, “what you resist will persist.”
  Ray Hardee   July 2018 
 Developing a Model for Process Safety Management
Working with chemicals can pose a host of dangers. Those in the process industries must take every step possible to protect employees and others from hazardous conditions.
  Jim Elsey   June 2018 
 22 Basic Pump Facts You Should Know
Pumps are stupid. A centrifugal pump is simply a machine, where for a given set of fluid properties, impeller geometry and operating speed it will react to the system in which it is installed.
  Jeff Sines   June 2018 
 What Drives a Fluid Handling System?
Since the motor performance defines the amount of shaft power developed as a function of shaft speed, the pump’s power curve is the motor’s power curve.
  Ray Hardee   May 2018 
 Types of Flow Meters
In this column, we will look at ways to measure the flow rate within a piping system without the expense of the custody transfer meters or the complexity of a flow control loop.
  Jim Elsey   May 2018 
 Newtonian vs. Non-Newtonian Fluids
Non-Newtonian fluids dilating and thixotropic fluids and are more challenging to pump.
  Jim Elsey   April 2018 
 Under Pressure: The Dangers of Vapor Pressure
Calculating NPSHr and NPSHa can prevent the pumped fluid's pressure dropping below its vapor pressure and causing cavitation.
  Ray Hardee   April 2018 
 Life Cycle Design for Industrial Piping Applications
Proper pipeline sizing helps pump water faster, more economically and more efficiently, which ultimately extends the life of the pump and improves the entire operation.
  Jim Elsey   February 2018 
 Maintaining Pump Systems for Reliable and Efficient Operation
In addition to my monthly column “Common Pumping Mistakes” the Pumps & Systems editors have asked me to write an article on the common ways that the systems can also reach out and bite you.
  Ray Hardee   January 2018 
 HVAC System Control:Thermal Load in Variable Volume Systems
Last month, we discussed how a constant volume heating, ventilation and air conditioning (HVAC) system would continually pump the same flow rate of chilled water through the entire system regardless of the cooling load.
  Jim Elsey   January 2018 
 Minimum Flow Redux
I wrote a detailed article on minimum flow for the Pumps & Systems November 2015 issue (read it here).