Ray Hardee January 2018
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
I wrote a detailed article on minimum flow for the Pumps & Systems November 2015 issue (read it here).
Lev Nelik January 2018
A recent question I received from an engineer in the Middle East had to do with a “double control” of boiler feed pumps (BFPs) at his power plant. The system was controlled both by set position of the valves as well as variable speed drives. I was intrigued.
Jim Elsey December 2017
Entrained air is typically measured by volume at atmospheric pressure and not by weight. While not a totally inclusive list, the following are the most common reasons for air entrainment in pump systems:
Jim Elsey December 2017
Read Jim Elsey's "Most Common Reasons for Air Entrainment in Pump Systems" here.
Ray Hardee December 2017
In last month’s column (read it here), we looked at cooling water service systems with multiple hydraulic circuits used to cool equipment in industrial/process industries.
Lev Nelik December 2017
Author’s Note: My October 2017 Pumps & Systems column (read it here) on shaft deflection due to internal loads ended with a challenge to the readers to do their own calculations to
Ray Hardee November 2017
In this month’s Pumps & Systems column, we will look at how simulating a large heat transfer system balance found in many industrial plants can be used to streamline plant operations.
Jim Elsey November 2017
A frequently stated expression around the pump industry is that viscosity is the Kryptonite of centrifugal pumps.
Ray Hardee October 2017
I always start my columns saying every element found in a piping system falls into one of three categories: pump, process and control. The secret to understanding any piping system is to have detailed knowledge of the various pieces of equipment and how they work together.
Jim Elsey October 2017
In a hypothetical world, if the Department of Energy (DOE) showed up at your plant to conduct an energy audit of the pump systems, what grade would you receive? Do you get an A … or an F?
Lev Nelik October 2017
Seal failures are the number one headache for many operators when it comes to pump reliability concerns. However, these failures are usually indicators of an underlying issue. Seal failure is rarely caused by a problem with the seal’s design or a fault during seal or bearing production.
Ray Hardee September 2017
In this month’s column, we will look at a pressurized forced main waste treatment system in an industrial process facility.
Joe Evans September 2017
Editor’s Note: This article originally appeared as a two-part series in the August and September 2008 issues of Pumps & Systems.
Jim Elsey September 2017
Horizontal end suction centrifugal pumps are undoubtedly the most common pumps in use in the world today, yet I witness basic misunderstanding of the pump specificatio