Pump Repair
The Effects of Radial Thrust on Centrifugal Pumps
We are often asked about the reason why centrifugal pumps fail. Some say bearing or seal issues. Perhaps a broken shaft. However, in our experience, the common denominator in most centrifugal pump failures comes down to radial thrust in excess. As a result, below we will further discuss the effects of radial thrust on centrifugal…
Read MoreHouston Dynamic Now Offers Hydraulic Testing
HDS has over 40 years of experience in all types of rotating equipment repairs, including Sundyne pumps. In fact, repairing Sundyne pumps is a large portion of their buisness. As more and more Syndyne pumps came into the shop, General Manager Luke Lau said they encountered many customers who didn’t have the technical expertise to…
Read MoreMain Pump Types – Rotary
Continuing with our series on the main types of pumps, next in line is the second type of positive displacement pumps, which are rotary pumps. Both types of positive displacement pumps, reciprocating pumps and rotary, can be further divided into categories of commercial applications, and it is important to know what they are as well…
Read MoreMain Pump Types – Reciprocating, Diaphragm
In the next installment of our “equipment series”, we will discuss diaphragm pumps. A reciprocating pump uses positive displacment to move reciprocating (back and forth) parts through the use of a piston, diaphragm, and at times a plunger. While a piston uses an up and down motion, as seen in car engines, the diaphragm pump…
Read MoreMisalignment of the Pump Shaft – One of the Top Six Pump Vibration Problems
If your plant is being stretched to its financial limit, you may be looking for ways to simplify some of your processes and procedures. Replacement of underperforming equipment and other costly solutions aren’t always the answer, and sometimes going back to basics can be all you need. For instance, trouble-shooting the root cause of a…
Read MoreBent Pump Shafts – One of the Top Six Pump Vibration Problems
As part of our series on the top 6 pump vibration problems, we would like to focus on bent pump shafts. A bent pump shaft can occur as the result of damage during operation, rigging, improper configuration, or even shipping. There are straightening methods that can be properly applied to salvage damaged pump shafting, although…
Read MorePump Flow Pulsation – One of the Top Six Pump Vibration Problems
Previously, we discussed the top 6 vibration problems that cause pumps to underperform or fail altogether. In this entry, we will discuss the issue of pump flow pulsation. Pulsation is the result of uncontrolled pressure waves caused by a change in flow. Media in a pump has a mass and there are required acceleration forces…
Read MoreCavitation – One of the Top Six Pump Vibration Problems
Previously we discussed the top 6 pump vibration problems, with cavitation as the most prevalent. Now it seems appropriate to discuss cavitation further including its causes and prevention methods. In short, pump cavitation is the formation of cavities or bubbles in the pumped media that develop in areas of low pressure around the impeller. When…
Read MorePump Impeller Imbalance – One of the Top Six Pump Vibration Problems
We have previously shared the top 6 vibration problems that lead to inferior pump performance. In this article we’ll discuss one of the more difficult ones: pump impeller imbalance. A number of factors can cause a pump’s impeller or other components to become imbalanced including improper use, collision with other equipment, and even normal wear…
Read MoreTop Six Pump Vibration Problems
Houston Dynamic Service’s technicians are dedicated to quality and trained in the latest rotating equipment repair techniques. Given our combined years of experience, we have seen the range of things that can go wrong in a large variety of pumps. We would like to share some of the knowledge that is gained through that experience.…
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