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Info Hub

Info Hub


Castle Pumps Ltd are a market leader in the marine and industrial pump industry and therefore have vast amounts of knowledge on pumps, and the like. This section of the website provides you with information to help you with your pump selection process, ensuring that the specifications you require are met. The info hub also provides pump aftercare information and handy tools such as unit conversion!

Pump Term Glossary

Pump Term Glossary

NPSH, Total Dynamic Head and Best Efficiency Point are just some of the terminologies used during the pump selection process, but do you what they mean? Technical jargon can sometimes leave your head in a bit of spin, so if you want to learn the lingo and understand what these words mean, let us guide you through 27 terms that you're likely to come across when buying a pump!

Read our pump term glossary

How to Calculate Head Loss in a System

How to Calculate Head Loss in a System

Head loss is an essential part of the preparation of looking for a pump with specific requirements. These head losses - also known as pressure losses - are sustained by the fluid as it flows through the pump and therefore can affect the pumping operation. Being such an important factor when making the decision on which pump to purchase, we have created this section for you to calculate the head loss within your application.

Read how to calculate head loss

How to Read a Pump Curve

How to Read a Pump Curve

Pump curves are essential during the decision making process, as they provide the information you need in order to see whether the pump will perform how you need it to! In their most basic form, performance curves contain flow rate and pressure data. Being able to read a pump curve enables you to choose the right pump, rather than choosing one that could potentially cause damage, consume unnecessary energy or perform poorly.

Read more on understanding pump curves

Pump Impellers – The Types & Their Impact

Pump Impellers – The Types & Their Impact

Impellers are an integral part of a centrifugal pump's operation. They come in varying shapes and sizes, offer an array of performance characteristics and are individually suited to different applications. Find out about the different types of impeller, the impact of diameter and what other factors need to be considered when choosing the right centrifugal pump for you.

Read about the types and impacts of impellers

The Importance of Chemical Compatibility

The Importance of Chemical Compatibility

Ever wondered why you can't just have a pump that's suitable for all fluids? Well this article will explain why, and it's all down to chemical compatibility! One of the first questions you'll be asked when sourcing a pump, fitting or pipework is 'what fluid are you handling?', and this is because the fluid will determine what material the pump needs to be made of. This article will explain why chemical compatibility is such an important factor when choosing the best solution for your pumping requirements.

Read more on chemical compatibility

Fluid Compatibility Guide

Fluid Compatibility Guide

Doing a fluid compatibility check when sourcing a pump is one of the first things you need to think about! Certain fluid/material combinations can result in corrosion, swelling, brittleness, leaking and even the dissolving of the pump! So ensuring you have the right pump material for the fluid you want, is a must! This fluid compatibility table will give you the information you need to determine which material will suit your fluid best.

Download the fluid compatibility guide

Why Viscosity is Critical to Pump Selection

Why Viscosity is Critical to Pump Selection

When specifying a pump for oil, we'll need to check what type of oil you'll be pumping. Viscosity is critical for pump selection, and with so many different types of oil it's no surprise that the range of viscosity can vary from oil to oil. Confirming the viscosity of the pumped medium will put you on track to getting the right pump for your application, and this article will explain in depth why knowing the viscosity is so important!

Read more on why viscosity is important

Pressed Metals vs Cast

Pressed Metals vs Cast

There are a number of differences between cast and pressed metals, but do you know how they could affect your decision when buying a pump? This article explains in depth what each type means as well as the pros and cons, so that you know which bits of information you should take into account when deciding on the best pump for your process.

Find out the differences between the two

Unit Conversion Tool

Unit Conversion Tool

A unit conversion tool for you to change product specifications into the units that you work with and know best. No more searching the internet for conversion tools that aren't precise or that you can't rely on, and no more trying your hand at tricky maths equations to figure it out. Here at Castle Pumps we've got it covered in just a few clicks!

Start using the unit conversion tool


      Castle Pumps are fully accredited to enable you to buy with confidence. Our accreditation includes:

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