Pump School

What Role Does Vapour Pressure May Have On NPSHA?

Previously we have discussed net positive suction pressure but avoided the role vapour pressure may have on NPSHA. Today, we will shed some light on this subject. The study of vapour pressure starts with developing an understanding of evaporation.…

Unveiling the Advantages of Sourcing OEM Parts Directly from the Manufacturer

Tech-Talk

When it comes to maintaining and repairing heavy-duty slurry pumps, the source of replacement parts can significantly impact performance, reliability, and overall efficiency. While there are various avenues for acquiring pump parts, obtaining…

The 3 Best Reasons Why You Should Consider a True OEM Repair for Your Slurry Pump

Blog, Tech Talk

In the realm of heavy centrifugal pumps and industrial rotary equipment, ensuring the longevity and optimal performance of your assets is paramount. When it comes to repairs, there's an often-underestimated gem in the world of maintenance: true…

Understanding how pump curves are generated

Blog, Service Adventurer, Tech Talk

Industrial pump manufacturers always have available pump curves for fixed-speed pumps with full-size impellers, but what if you want to run the pump at a different RPM or use a trimmed impeller? Well, the manufacturer should be able to provide…

What’s the Difference Between Water Pressure & Water Head

Blog, Service Adventurer, Tech Talk

In a previous blog, I quoted the number 2.31 when discussing the relationship between water pressure & water head. Since then I have had a request to elaborate on the number 2.31 and where it comes from. Frankly, with many gauges still…

Let’s Explain the Confusing Term: Bulk Density Ratio

Blog, Service Adventurer, Tech Talk

A couple of months ago I used the term “Bulk Density Ratio” and said that it was a subject for another day. So today is the day. The term bulk density ratio describes the relationship of a material or substance mass as found in a…

Understanding the Effects of Specific Gravity on Centrifugal Pumps’ Head and Pressure

Blog, Service Adventurer, Tech Talk

It is very important when working with centrifugal pumps that there is a clear understanding of how specific gravity, commonly abbreviated to just SG, affects or doesn’t affect pump output in terms of head and or pressure. Let’s first…

Differences Between Cutter Fan Agitators and Shaft-Connected Inducers

Blog, Service Adventurer, Tech Talk

I was recently in a discussion with an engineer regarding the use of a cutter fan to supply agitation. I was very surprised to find that the engineer, although having some pump experience did not understand the difference between the title…

There Is No Such A Thing As A Bad Pump Only A Misapplied Pump!

Blog, Service Adventurer, Tech Talk

No manufacturer that has been around for any length of time makes a bad pump. The bad press that follows an early pump failure is generally the result of a misapplied pump. Unfortunately, it is often the pump's reputation that takes the rap…

6 Parameters Maximizing A Mechanical Seal’s Performance And Longevity

Blog, Service Adventurer, Tech Talk

Pumps fail for a host of reasons, but as the chart below depicts, more than two-thirds of the failures relate to sealing device issues. With the movement to conserve water and minimize the quantity of waste liquids requiring treatment, the industry…

When Hevvy/Toyo’s “Biggest Sand Pump” Rescues A Billion Dollar Drill Rig

Blog, Service Adventurer, Tech Talk

Over the holidays my son asked me if I had ever been on an oil drill rig. In enlightening him as to what his old man did in the 80s I realized the story might me interesting to others, so here goes. It started with a telephone call from a…

Getting A Submersible Pump’s Rotation Right

Blog, Service Adventurer, Tech Talk

I spent the better part of 25 years attending hundreds of submersible pumps' start-ups, and the single most common error I had to correct prior to commissioning was the pump's rotation. The majority of Hevvy/Toyo submersible pumps sold feature…

Cleaning Carbon Tanks In Carbon in Leach And Carbon in Pulp Processes

Blog, Service Adventurer, Tech Talk

The two gold extraction processes CIL (Carbon in Leach) and CIP (Carbon in Pulp) are quite similar, both using granulated activated carbon to extract the gold from the solution. For the extraction processes to function efficiently a specific…

Understanding How Static And Dynamic Balancing Affect Cantilever Pumps

Blog, Service Adventurer, Tech Talk

I was recently asked to investigate a vibration in a vertical cantilever pump. The client had recently rebuilt the pump and was wondering what he had missed or done wrong. In the absence of any vibration monitoring equipment, we resorted to…

What exactly is an impeller’s “tip speed” and how do you calculate it?

Blog, Service Adventurer, Tech Talk

Establishing an impeller's “Tip Speed” is very useful when selecting the best pump for your application, but what exactly is tip speed and how do you calculate it? The tip speed is simply the distance that any selected point on the peripheral…

Differences Between Flush and Quench In Slurry Pump Seal Support Plans

Blog, Service Adventurer, Tech Talk

When discussing slurry pump seal support plans it seems that the terms “Flush” and “Quench” are often confused and or misused. With the concept being slightly different for mechanical seal boxes vs packed seal boxes I will separate these,…

Pumping Cow Manure

Service Adventurer

I just thought I would share my latest adventure. It was quite smelly to say the least. We had a customer who bought a HS-E81-80 pump for a dairy farm. Now who would have thought that a manufacturer that produces the best slurry pumps in…

Impeller Designs

Pumps

I recently received an e-mail asking to explain what the terms “open” or “closed” referred to when discussing impellers in a slurry pump. So here it is. Although there are numerous styles/designs offered by pump manufacturers, most…

Checking The Condition Of A Submersible Pump Motor

Pumps

Whether it be a submersible pump you already own or a used pump you are looking to buy, it is important to know the condition of the electric motor. A few quick checks can save you a bunch of time and or money. The most common problem in…

To Check or not to Check?

Pumps

I often receive questions as to whether a check valve in a pumping system is a good or a bad thing. Auto closing check valves are often an integral part of a successful pumping system; however, they can also be the root of many system failures.…

Single Phasing in Electric Motors

Service Adventurer

Causes and Solutions to Protect your Motor I once had a customer ask me for some advice to help them come up with some ideas as to why their pump would trip as soon as it was lowered into slurry. I asked questions such as: Have…

What Role Does Vapour Pressure May Have On NPSHA?

Unveiling the Advantages of Sourcing OEM Parts Directly from the Manufacturer

The 3 Best Reasons Why You Should Consider a True OEM Repair for Your Slurry Pump

Understanding how pump curves are generated

What’s the Difference Between Water Pressure & Water Head

Let’s Explain the Confusing Term: Bulk Density Ratio

Understanding the Effects of Specific Gravity on Centrifugal Pumps’ Head and Pressure

Differences Between Cutter Fan Agitators and Shaft-Connected Inducers

There Is No Such A Thing As A Bad Pump Only A Misapplied Pump!

6 Parameters Maximizing A Mechanical Seal’s Performance And Longevity

When Hevvy/Toyo’s “Biggest Sand Pump” Rescues A Billion Dollar Drill Rig

Getting A Submersible Pump’s Rotation Right

Cleaning Carbon Tanks In Carbon in Leach And Carbon in Pulp Processes

Understanding How Static And Dynamic Balancing Affect Cantilever Pumps

What exactly is an impeller’s “tip speed” and how do you calculate it?

Differences Between Flush and Quench In Slurry Pump Seal Support Plans

Pumping Cow Manure

Impeller Designs

Checking The Condition Of A Submersible Pump Motor

To Check or not to Check?

Single Phasing in Electric Motors

Pumping Solutions

Engineering & Innovation

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