An image explaining the difference between malleability and ductility.

What is the Difference Between Malleability and Ductility?

Angus EwartTech Talk, UncategorizedLeave a Comment

In the blog article, “Thermal Shock” I used the word ductility. This word is one of a handful of terms commonly used to describe the characteristics of metals and how they react to externally applied forces. Terms such as malleability, hardness, brittleness, toughness, abrasion resistant and impact resistant are commonly used when describing metals but not always completely understood. THE DIFFERENCE BETWEEN … Read More

slurry pumps being used to move slurry around.

How Do You Solve Vibration Issues in a Slurry Pump?

Angus EwartUncategorizedLeave a Comment

Vibration issues with your slurry pump might be obvious: your slurry pump shakes like a wet dog, or subtle: you keep losing bearings or seals prematurely and don’t understand why. In either case vibration can cause a number of problems with your pump that can lead to costly repairs, downtime and shorter mean times between failure.  How to Confirm a … Read More

Slurry pump being used out in the field while being sprayed with water.

Slurry Pumps: The Ultimate Preventive Maintenance Guide

Angus EwartPumpsLeave a Comment

Are your slurry pumps in good condition? I travel to customer sites on a weekly basis and I see a full range of good and bad when it comes to pump maintenance. I decided to write a blog on the most common preventive maintenance tips concerning the Hevvy/Toyo line of pumps so it’s available even when I’m not. This list … Read More

Thermal shock breaking ice.

Thermal Shock

Angus EwartTech TalkLeave a Comment

Our blog on “Total Discharge Recirculation” mentioned thermal shock as a destructive force that can damage or destroy pump components.  With how destructive this force can be, I thought it necessary to spend some time expanding upon this subject. Wikipedia explains that thermal shock occurs when a thermal gradient causes different parts of an object to expand by different amounts.  This … Read More

A mine filled with ice and water.

The Challenge of Underground Mine “Dewatering”

Angus EwartMining, PumpsLeave a Comment

In-depth Knowledge on Solving Seal Failure in Dewatering Applications If you are an owner, operator or user of Electric Submersible pumps in Mine Dewatering and currently experience multiple seal failures within one year of start-up and installation… Please read on. Additionally, if you are a fellow professional in the field that wishes to share observations and constructive comments then please … Read More

Water boiling in a pot.

Total Discharge Recirculation

Angus EwartTech TalkLeave a Comment

Gain In-Depth Knowledge on Discharge Recirculation In previous blogs we have defined Cavitation and reviewed Discharge Cavitation.  In this blog I would like to discuss a specific type of discharge recirculation known simply as “Total Discharge Recirculation” or “TDR” for short.  All forms of pump recirculation, as the term denotes, evolve some portion of the liquid not following the desired path.  When referencing … Read More

An impeller blade with serious signs of cavitation.

Defining Discharge Recirculation

Angus EwartTech TalkLeave a Comment

Gain In-Depth Knowledge on Discharge Recirculation In our last blog we discussed cavitation singling out suction cavitation to illustrate the concept. In this blog, as promised, we will discuss discharge recirculation, also sometimes referred to as discharge cavitation.  The term discharge recirculation is often used interchangeably with the term discharge cavitation.  Although these two are clearly related they have a few distinct differences.  … Read More

A rusty impeller blade with signs of cavitation.

Gain In-Depth Knowledge on Cavitation

Angus EwartTech TalkLeave a Comment

What it is and how it works Cavitation is potentially the most destructive force at play within a pumping system, however it is the least understood issue by many pump operators. To quote Sun Tsu from the Art of War, “know thy enemy”. In this blog, we will discuss our enemy cavitation and how it relates to pump cavitation. This article … Read More

Slurry being pumped out at a mine.

Velocity Head

Angus EwartTech TalkLeave a Comment

Gain In-Depth Knowledge on NPSHA In this blog we will discuss Velocity Head as it is the final component left of our 6 part NPSH blogs and the one we have avoided addressing previously. Reference books would describe velocity head as a basic concept of fluid engineering that represents the bulk motion, i.e. the kinetic energy, of the fluid. It can … Read More