Two trusted names in the industry have formed a powerful partnership for supporting diesel fuel and lube oil pumps. Leistritz, a global leader in the manufacturing of specialized screw pumps and technologies, has formed a powerful partnership in defeating obsolescence with Hydro.
Due to the age of pumps in the industry today, many become obsolete and unsupported by their manufacturers, while still actively in service. This poses safety issues. Through engineering and integrated manufacturing, Hydro can now meet your needs quickly, without any changes to your system. Quality assurance backed by ASME III and Z299 certifications.
Vibration issues with a two-stage pump forced a major steel manufacturer to remove the pump from service. Due to incorrect weights welded on an impeller, a steel manufacturer called upon Hydro to repair and balance a two-stage pump.
Written by: Ken Babusiak (Hydro, Inc.) Published by: World Pumps
The pump was experiencing the vibration during the spring and summer months of 2016. The steel company sent the pump to HydroAire’s Chicago, IL facility in September of that year. HydroAire was able to determine the cause of the vibration and created a solution that got the pump back in operating condition. The pump was installed and back in service by February, 2017.
The initial testing and analysis deter-mined that the impeller had large weights welded onto it. The steel company was concerned for many reasons, especially because the staff knew that using weights was not the correct way to balance an impeller. This caused the steel manufacturer to question the manner in which the pump had previously been repaired.
Adding weights to impellers is generally not standard practice.
Power pump performance improved with redesign of the first-stage, double-suction impeller and twin volute.
This project has been divided into two articles. The first, published in the June 2017 Pumps & Systems; the second, published in September 2017 Pumps & Systems.
Written by: Dave Allard & Dr. Gary Dyson Published by: Pumps & Systems
In the aftermarket business, part replication is not enough. Precision engineering combined with the latest technology are essential for manufacturing high-quality parts. A main boiler feed pump at a Midwestern United States power plant was built in 1967 using sand casting and wooden patterns, now considered outdated technology. Even though the pumps received refurbishment every six to eight years, the pumps continued to have low performance as well as vibration issues.
Using all its resources—including casting simulations, 3-D models, up-to-date foundry casting techniques and considerable engineering data—Hydro fully manufactured a complete element, performed sophisticated testing in the Pumps Test Lab Approved Program (PTLA) certified test lab, and returned the pump to operation within just 12 weeks.
This project involved the manufacture of a complete first stage twin volute and a description of the latent defects.
The pump suffered from ongoing vibration issues which were caused by pressure pulsations at vane frequency. To improve the vibration levels, hydraulic analysis and redesign were required to develop a new, improved design.
This project has been divided into two articles. The first is the manufacturing of the twin volute and the second is the design of a new impeller.
Image 1. A received bundle showing failure in the twin volute stage piece. Hydro received the internal element and casing (pump bundle, or element) of the pump. (Images and graphics courtesy of Hydro, Inc.)
The first-stage twin volute is a complicated casting, which failed during operation as a result of poor design.
Hydro re-engineered the casting by using sophisticated engineering and 3-D modeling, along with simulation software and 3-D sand printing.
In addition, Hydro identified the opportunity to improve the performance of the pump by redesigning the first-stage double-suction impeller. To improve vane passing frequency, the first-stage double suction impeller was redesigned with staggered and split vanes.
Hydro’s aftermarket services capability provided a completely new replacement element for this high-energy boiler feed pump and also redesigned the castings to eliminate the original latent defect in the casting design.
Hydro provided sophisticated hydraulic engineering improvements to increase the mean time between repairs (MTBR) of the newly manufactured element.
Hydro Middle East, specialists in pump rebuilding, particularly in the oil and gas industry and other industrial markets was called in to assess the damage and redesign and rebuild the fire-damaged pumps. Hydro’s engineers first evaluate the causes of any pump damage or failure and then provide expert engineering analysis and a responsive field service.
Written by: Thomas Arakal (Hydro Middle East) Published by: World Pumps
Two fire damaged pumps arrive at the Hydro Middle East Service Centre.
Analysis & recommendations
In the case of the fire-damaged pumps, once the fire was under control, Hydro immediately sent a field engineer to the site to conduct a root cause analysis and make recommendations to ensure that the equipment would be restored within the very fast turnaround that the company required.
The engineers discovered that the fire had been so severe it had completely burned out all of the oil in the bearing housing. In addition, the baseplate was also warped because of the excessive heat. A turnaround of between two and three weeks for redesign and rebuild was proposed, subject to mechanical seal availability and the two hot oil circulating pumps, along with the baseplate and the motors were shipped to Hydro Middle East’s facility in Dubai, U.A.E.
The new 33,000 square building in La Porte, Texas.
HydroTex, a subsidiary of Hydro, Inc., announces the move of its Deer Park operation to a new 33,000 square foot building in La Porte, TX.
The new service center will offer expanded capacity for analysis, engineering, rebuilding and repair services for pump systems and rotating equipment as well as climate controlled storage of pumps and parts.
Located near the busy Houston Ship Channel, the new facility is ideally situated to serve the needs of surrounding industries using pumping equipment of any capacity. To learn more about the new facility or to schedule a shop visit, please contact HydroTex.
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Two trusted names in the industry have formed a powerful partnership for supporting diesel fuel and lube oil pumps. Leistritz, a global leader in the manufacturing of specialized screw pumps and technologies, has formed a powerful partnership in defeating obsolescence with Hydro.
