Category Archives: INSTRUCTIONAL

Caustic Soda Transfer Pumps: Alternative Solutions

Sodium Hydroxide (NaOH), or more commonly known as caustic soda, is one of the most widely used chemicals in manufacturing processes. We come across pumping applications for caustic quite often and the primary concentration we see is a 50% solution. I am not saying this is the most common around the world, but this is just […]

Dynamically Sealed Pump Overview

When working with customers we like to focus on pumping solutions that are a bit out of the norm for a lot of people. One of the pump brands we represent in the State of Tennessee is WILFLEY. This is a company that started as a slurry pump manufacturer that morphed into one of the most […]

The Affinity Laws

As part of our ongoing quest for knowledge and perfection, we at Hagler are starting a group of instructional posts pertaining to pumps and their properties.  Of course, without basic fundamental knowledge of pumps, sizing and selectioin can be utterly confusing.  Let’s put some of that confusion to rest. Centrifugal Pump Affinity Laws Centrifugal pumps […]


External Circumferential Piston vs. Lobe – What is the difference? Let me start by saying, I will not write External Circumferential Piston pump the entire blog. It will be referred to as an ECP pump! I often get asked the question, “What is the difference between a lobe pump and an ECP pump?” Let it be […]