Tag Archives: composite wear components

The Final Installation Steps: Length and Clearance

Upgrading pumps with composite wear componentsSetting the final dimensions of your DuPont™ Vespel CR-6100 component

Review

We have discussed how to measure your pump, prepare the metal parts, and establish the press fit for your Vespel® CR-6100 installation. The final two dimensions you need to establish are the part length and the clearance.

The Part Length

Vespel® CR-6100 has an extremely low coefficient of thermal expansion in the radial plane (perpendicular to rotation). This is one of the principal reasons it performs so well in centrifugal pump components. The low coefficient of thermal expansion is achieved through the use of radially-oriented, long carbon fibers.

Conversely, the coefficient of thermal expansion along the axis is relatively high. Therefore, the part length for a Vespel® CR-6100 component should account for the axial thermal expansion at operating temperature. Table 4 of our installation guide provides the details on how to make this adjustment.

Table 4 of our installation guide provides the details on how to make this adjustment.

The Clearance

The clearance for the part is set depending on the diameter and component type. Tables 2a and 2b in the installation guide show the clearance recommendations for horizontal pump components such as pump wear rings, throttle bushings, center bushings, inter-stage rings, balance bushings, and throat bushings.

Tables 2a and 2b provide recommended minimum clearance for horizontal pump components.

Tables 3a and 3b show the clearance recommendations for vertical pump components like vertical pump shaft bearings, wear rings, and throat bushings.

Tables 3a and 3b provide recommended minimum clearances for vertically suspended pump parts.

The best way to set the clearance is to press the component into place, and then final machine the bore to the desired clearance. This is shown in steps 5a-7a in our installation guide, pages 8-9.

Where final machining after the press fit is not practical, you can design the component to have the correct clearance after the press fit. For most component geometries, you can assume the Vespel® CR-6100 will reduce at a 1:1 ratio with the press fit. This method is shown in steps 5b-7b in our installation guide, page 9.

Some sites have implemented a hybrid method. They measure the inside diameter of the Vespel® CR-6100 case wear ring after installation, and then machine the metal impeller wear ring to set the desired clearance.

Conclusions

Installing Vespel® CR-6100 is an easy upgrade to make your pumps more reliable, safe, and efficient. Follow the steps in our installation guide and you can make your pump even better than the day it was new. If you need material, Boulden carries inventory of stock sizes in the USA, Europe, and Singapore.

Until next time, please feel free to contact Boulden with your application details or to request a quote. We’ll be happy to answer any questions you might have.

 

Helpful Links:

Standard Stock Sizes of Vespel® CR-6100

Vespel® CR-6100 Product Data Sheet

Pump Improvements

Today’s Photo

Rock of Gibraltar – was one of the Pillars of Hercules and was known to the Romans as Mons Calpe.

 

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Case Study: Upgrade Your Pumps for Reduced Steam Consumption

A major unit at a petrochemical facility in Asia recently upgraded a Byron Jackson boiler feed pump with Vespel® CR-6100 non-metallic wear rings. This pump is driven by a single stage steam turbine. The objective of the upgrade was to reduce steam consumption.

The case wear rings in the 9 stage pump were upgraded to Vespel® CR-6100 , along with the center and throttle bushings. Using the non-metallic composite Vespel® CR-6100 allowed a reduction in the wear ring clearance. All components were fabricated with the Boulden PERF-Seal® design, which helps the pump achieve higher efficiency and improved stability compared to conventional smooth bore wear rings.

Benefits of Updating Case Wear Rings to Composite Materials

After the upgrade, plant personnel measured steam consumption assuming the same pump operating conditions as before the upgrade. The results were the following:

  • Total efficiency improvement of nearly 5%.
  • As the customer operates pump for 140 days per year, steam savings are $26,000 per year.
  • Radial vibration after the upgrade was significantly reduced by nearly 50%.

Because of the success of this upgrade project, the site is considering upgrading many more high-energy pumps with Vespel® CR-6100 and the PERF-Seal® design.

Vespel® CR-6100 case wear rings in a 9 stage pump

 

 

 

 

 

 

 

 

 

 

 

Higher efficiency and lower vibration are typical benefits of an upgrade to Vespel® CR-6100 and the PERF-Seal® design.

If you have a high energy pump, whether a charge pump, boiler feed water pump, or product shipping pump, consider upgrading the wear components during your next repair. You can save a ton of money and make the pump run better. Contact Boulden to discuss your application. If you have a pump currently in your shop or arriving soon, we have the material you need in stock and can deliver what you need quickly.

Case Study: Repeat Failures of Boiler Feed Water Pumps

Vespel®CR-6100 centrifugal pump components

Boiler Feed Pump Seizing Problems

The low lubricity of boiler feed water along with operational challenges can lead to pump seizures. How do you avoid the problem? Or, if it happens, what is the best way to solve the problem? This case study is about repeat seizures of two, new, 1.2 MW boiler feed water pumps operating in a refinery. The pumps were fitted with metal wear parts, ran at 2980 rpm, and experienced failures immediately after commissioning.

The Tale of the Terrible Boiler Feed Pumps

Here is a brief summary of the problems this site faced with their boiler feed pumps:
  1. The first failure was due to pump seizure, the original failure analysis suggested the pumps failed due to sand or debris lodging into the close clearance between rotating and stationary wear parts. The filters on the suction strainer were changed to a finer mesh to limit particle size which could enter the pump.
  2. Soon after, one of the pumps seized again–this time, the metal parts had galled before start up and the pump could not be rotated by hand. The clearances at the wear rings, center bushing, and throttle bushing were increased.
  3. The pumps seized again.
  4. Repeated start-up attempts against seized pumps had also damaged the pump motors.

The failure analysis led the engineers to re-check the entire design and installation of thepumps:

  • Re-checking the design basis of the pumps
  • Re-checking the materials of construction
  • Re-checking assembly and rotor run-out
  • Re-balancing the rotor
  • Performing a new pump rotordynamic analysis
  • Verifying soundness of foundation and that pipe strain within limits
  • Evaluation of operational practices and function of the minimum control valve

Minimum Flow Valve Problem

Ultimately, the site realized the minimum flow valve was not functioning properly, leading to low flow rates at start up. The low flow rates caused localized flashing inside the pump and the metal parts would seize.

Their corrective action was to change the minimum flow valve, increase the clearance at the center bushing, throttle bushing, and wear rings, and “upgrade” to a “non-seizing” metal alloy. Because they increased the clearance at all of the internal parts, they ran a new rotor dynamic analysis to verify that the rotor would remain stable.

How Much Did It Cost?

Between repeated pump repairs, motor overhauls, engineering resources to troubleshoot and re-verify the design, the problem undoubtedly cost hundreds of thousands of dollars. If start up was delayed or the site lost production, the losses were probably in the millions.
The solution was also extremely expensive. The clearance at the pump wear parts was permanently increased. We’ll generously assume the increased clearance resulted in a 2% efficiency loss. Assuming a power price of $0.12/kw-hr, this loss of efficiency will cost about $50,000/year. Over the life of the pumps, the site will lose another million dollars or more!

Avoid Pump Seizure By Using Vespel® CR-6100

If the site had specified Vespel® CR-6100 wear parts when the pump was ordered, the pump would not have seized. Most likely, the pumps would have made it through the low flow transients without issue and all of the efforts above could have been avoided. The motors would not have been damaged, and they would not have had to increase the internal clearances. Even after the first seizure occurred, they could have easily converted to Vespel® CR-6100 and saved time, effort, and cost. The small adder to specify Vespel® CR-6100 would have saved several hundred thousand dollars at a minimum.

Furthermore, because Vespel® CR-6100 does not seize, clearance at the wear rings, center bushing, and throttle bushing could have been reduced, resulting in an efficiency gain instead of an efficiency loss. So, instead of losing $50,000 per year in operating costs, the site could have saved at least $50,000 per year–a net $100,000 annual savings from using Vespel® CR-6100. Combined with the Boulden PERF-Seal® design, the pump would be more reliable, easier to operate, and more efficient than a pump with metal parts and increased clearance.

Conclusion

If you are buying or overhauling a boiler feed water pump, specify Vespel®CR-6100 for all of the stationary wear parts (the rotating parts will remain metal). You’ll have a better pump that is easier to operate with a lower life cycle cost due to higher efficiency. If you have an existing pump that seizes, contact Boulden today. We can help you solve this problem in just about any pump service.

If you simply have an urgent repair and need a great material fast, we have a large inventory of material in stock and can supply raw material or machined parts with very short lead times. If you have dimensions, quantities, and basic service conditions, simply request a quote. We’re here to help you!

Case Study: Upgrade of Boiler Feed Water Pumps

Last week, we wrote about a boiler feed pump case history where the customer paid dearly because they didn’t use Vespel® CR-6100. Repeated failures due to pump seizure led them to increase the clearance at the wear rings, resulting in a lifetime of lower efficiency and higher operating costs.
Published right next to that unfortunate history was another boiler feed case study where the site and the shop involved took a set of 50-year-old boiler feed pumps and made them run better than when they were new. Unlike the first case history, they used Vespel® CR-6100.

The 50-Year-Old Pumps

The boiler feed pumps were originally installed in 1970 with 1.1MW electric motors. They are 8-stage BB5 pumps with 80 bar (1200 psi) differential pressure. Over many years of wear, erosion, and mechanical seal failures, the pumps needed to be overhauled.
The internal wear components were found to be running with clearance more than double the API design values for metal wear parts. The excessive clearance at the balance drum created high-velocity flow and erosion at the pump discharge cover. The seal design was outdated and the seal flush design was not correct. Some of the old pump components had very poor concentricity.

What They Did

The pump internals were repaired as needed. Obsolete parts were re-engineered and restored to good concentricity. The seal was updated and flush plan was corrected.
For the wear components, Vespel® CR-6100 wear rings, inter-stage rings, and balance drum bushing were installed with the patented Boulden PERF-Seal® design. Clearance at the wear components was reduced to approximately 50% of the API minimum values for metal parts. To save time and money in the shop, the existing metal wear components were re-machined and used as holders for the Vespel® CR-6100 components.

Results

Compared to the worn out condition, the pumps gained 15% efficiency after the overhaul. Depending on the local power price, this represents $100,000–$150,000 per year in lower operating costs.
Compared to the original design curve, the pump is 4% more efficient than when it was new, representing $30,000-$40,000 of lower operating costs. Maintaining this efficiency in the coming years will result in hundreds of thousands of dollars of savings.

Conclusion

If you are buying or overhauling a boiler feed water pump, specify Vespel®CR-6100 for all of the stationary wear parts (the rotating parts will remain metal). You’ll have a better pump that is easier to operate with a lower life cycle cost due to higher efficiency. If you have any pump where you are looking to increase efficiency, contact Boulden today. We can help you increase pump efficiency in most pumping services.
If you have an urgent repair and need a great material fast, we have a large inventory of material in stock and can supply raw material or machined parts with very short lead times. If you have dimensions, quantities, and basic service conditions, simply request a quote. We are here to help you.
Until next time, stay safe and healthy. And don’t use metal parts in your boiler feed water pumps.
Boiler Feed Water pump upgraded with Vespel® CR-6100 componenets

BB5 boiler feed water pump upgraded to Vespel® CR-6100 with the PERF-Seal® design for the wear parts

A Look at Life Cycle Costs – Part 3: Unplanned Events

Typical Life-Cycle Cost For A Pump System Infographic

Typical Life-Cycle Cost For A Pump System

Today we take a final look at the above graph. We have already looked at Energy and Maintenance costs. Today we look at Operating, Environmental, and Downtime Costs.

When you upgrade pumps with composite materials like Vespel® CR-6100, Boulden B-Series, or Metcar® composites, you eliminate the metal-to-metal contact points in the pump, which essentially eliminates the risk of pump seizure. The pump is far more likely to survive running dry at start-up or during off-design events.

Benefits of Upgrading Pumps With Composite Materials

These are hidden bonuses to upgrading your pumps with composite materials. High quality composite materials act like a safety net in your pump, and sometimes, the savings from this benefit pay for all of the composite upgrades your company will ever do. Consider the following case studies:

Case Study: Condensate Return Pumps

Many years ago, a refinery upgraded the vertical pump shaft bearings in one of their 3 condensate return pumps to Vespel® CR-6100. The other two pumps had their original bronze bearings. The pumps were located in the hot well of a condensing steam turbine. The turbine was driving a critical compressor in one of the refinery process units.

Something happened which changed the pressure in the hot well and the pumps started operating in a vacuum intermittently for 9 hours. The two pumps with bronze bushings seized and had to be removed from service. The pump with Vespel® CR-6100 survived and allowed the process unit to continue operating. An upgrade which cost about $2000 likely saved the refinery millions.

Case Study: Potassium Carbonate Pumps

Plant operators heard a loud noise coming from a hot potassium carbonate pump. They were concerned because if potassium carbonate is released into the atmosphere, it creates a respiratory hazard. They shut down the pump and switched to the spare.

When the pump arrived in the shop, they found a piece of metal had broken from a valve and lodged in the pump impeller. Fortunately, during the previous repair, the maintenance shop had upgraded the pump to Vespel® CR-6100 case rings. During the incident, the pump did not seize, the seals didn’t leak, and a potentially major incident was likely avoided. A $3000 upgrade to the wear rings likely saved hundreds of thousands of dollars.

Case Study: Hydrocracker Charge Pump

Improved efficiency can also translate into increased production. A refinery upgraded their 9-stage hydrocracker charge pump, operating at 6400 rpm to Vespel® CR-6100 wear rings with reduced clearance. This $25,000 upgrade increased unit throughput by 4% creating millions of additional revenue for the refinery over the life of the installation.

Pump Impeller with Vespel CR-6100 wear rings

Conclusion

Upgrading your pumps to composite materials reduces pump life cycle costs by making your pumps safer, easier to operate, more reliable and more efficient. When unexpected events occur or where you can increase throughput, a single installation can save you millions of dollars.

Take a look at the pumps coming into your workshop. Use the repair as an opportunity to make the pump better by upgrading to composite wear parts. Boulden has the material you need in stock and can deliver raw material or machined parts with very short lead times. Get in touch with us today!

A Look At Pump Life Cycle Costs – Part 1: Maintenance

Typical Life-Cycle Cost For A Pump System Infographic

Typical Life-Cycle Cost For A Pump System

Most of us have seen a graph similar to the one above. Over the life of an engineered pump, the energy consumption and maintenance will account for the majority of the life cycle cost. So, if you can make your pumps more efficient and more reliable, you will save a lot of money.
Over the years, we have collected several groups of data to suggest how much money you can save from using composite materials in your pumps like Vespel® CR-6100Boulden B-Series, or Metcar® composites. The savings come from two areas–improved reliability and efficiency.

Improved Pump Reliability = Maintenance Savings

Improving pump MTBR has been a primary focus of Rotating Equipment Engineers for decades. Longer life means fewer repairs, lower chance of downtime, and lower risk of environmental or safety incidents. There is no doubt that more reliable pumps save money. The question related to composite materials is how much of an MTBR improvement should be expected from the upgrade?
To answer that question, we have several data sets:
  • Between the years 2004–2006, a refinery upgraded 61 “bad actor” pumps to Vespel® CR-6100. In the 3 years prior to the upgrades, this group of pumps would result in 20-30 repairs. In the 3 years after the upgrades, this group of pumps averaged fewer than 10 repairs per year.
  • Another plant looked at 11 vertical pumps for 5 years before and 5 years after upgrading the shaft bearings and found repairs had been reduced by 64%.
  • Several other data sets have shown dramatic improvements in the overall plant MTBR when the site included Vespel® CR-6100 into their pump reliability improvement program.

Average Pump Repair Cost

We can use the study of 61 pumps to estimate the annual savings. The average repair cost of an API pump is about $12,000. Prior to upgrading to Vespel® CR-6100, this site had between 20 and 30 repairs per year–$240,000 to $360,000 annually to repair this group of pumps. After the upgrades, with fewer than 10 repairs per year annual repair costs were less than $100,000. That is a savings of around $200,000 every year. The upgrades to composite materials easily paid for themselves several times over.

Conclusion: Upgrade Pump Parts To Composite Materials

In short, using quality composite materials like Vespel® CR-6100 with reduced clearance in your pumps will lead to a big increase in pump life and significant maintenance savings. Next month, we’ll discuss energy savings.
Until then, whatever the temperature, chemical, or operating conditions for your pump, it is likely that Boulden has a non-seizing, non-galling composite material to help you improve your pump reliability. Boulden has a large inventory of material in stock and we can supply raw material or finished parts with very short lead times. We can provide all of the technical support required for you to make the upgrade a success.
Contact us today and use your next repair as an opportunity to upgrade your pump.

 

Solving Vertically Suspended Barrel Pump Failures

Between 2011 and early 2012, a refinery suffered repeat failures of a pair of vertical pumps. Looking at the cross section, you can see this is not an ordinary pump. It is essentially a BB5 multi-stage diffuser pump mounted vertically.
The pumping conditions are also uncommon–0.61 specific gravity hydrocarbon running at 300 F (149 C). The vapor pressure is nearly 50 psi (3.3 bar), well into the range of a flashing hydrocarbon.
In short, not an easy application–a vertically mounted, multi-stage, barrel pump in a hot, light, flashing, low viscosity hydrocarbon.
Vertically Suspended Barrel Pump

Vertically Suspended Barrel Pump

 

 

Repeat Pump Failures

The pumps were failing due to seizure of the original metal parts, which were 12% chrome alloy with a hardness difference. At the point where the refinery contacted Boulden, the pumps had failed several times in the previous year.

The Upgrade

The engineers at the plant had heard that Vespel® CR-6100 wear parts would not seize. They discussed with Boulden that the material could handle the service conditions. The temperature limit for Vespel® CR-6100 is 500 F (260 C) and it resists all hydrocarbons without issue, so this application was well within the capabilities of Vespel® CR-6100. After several failures with the metal parts, the refinery decided to go forward with Vespel® CR-6100.
Vespel® CR-6100 wear rings, inter-stage rings, and throttle bushings were installed. Clearance at the wear rings was reduced to approximately 50% API recommended values for metal parts. A year later, the spare pump was also upgraded.

Results of Upgrading to Vespel® CR-6100

The first pump finally came out of service in early 2021 after nearly 9 years. From the look of the components, the Vespel® CR-6100 survived some really tough conditions. There was evidence of running dry, hard contact between rotating and stationary parts, and local temperatures well over 300 F (149 C). Yet, the pump never seized, and the Vespel® CR-6100 parts remained in usable condition all the way to the end of the run.
The MTBR for these pumps went from a few months to 9 years with a simple upgrade to Vespel® CR-6100. The investment in Vespel® CR-6100 has probably paid for itself 100 times over. The pumps clearly last longer, are easier to operate, and arguably much safer because they do not seize in this hot, flashing hydrocarbon service.

Conclusion

Do you have an application more difficult than this? Tell us about it.
Take your next repair as an opportunity to upgrade your pump. Boulden has a large inventory of material in stock and we can supply raw material or finished parts with very short lead times. We can provide all of the technical support required for you or your preferred workshop to make the upgrade a success.
Whatever the temperature, chemical, or operating conditions, it is likely that Boulden has a non-seizing, non-galling composite material to help you improve your pump reliability. Contact us today with the process conditions and we will let you know what we can do.

 

Boulden Partners With Metcar To Distribute Carbon Graphite Parts

Boulden is excited to announce that it is now distributing Metcar’s  M-161 babbitt impregnated carbon graphite and M-310 nickel impregnated carbon graphite materials. Boulden has been serving the pump repair industry for decades with a range of composite materials. Our objective is to support plant engineers to improve the reliability, efficiency, and safety of their machines. The combination of Boulden’s service-minded mission and Metcar’s high-performing materials will be a valuable asset to the pump repair industry.

Reducing Pump Failure with Carbon Graphite Materials

The M-161 and M-310 material grades are critical to the reliable operation of countless pumps in the utilities, oil & gas, and petrochemical industries. Carbon graphite is self-lubricating, so it can run dry in certain conditions without the need for grease or oil lubrication. Since there is no metallic attraction between carbon graphite and metal running surfaces, these M-161 and M-310 materials are not prone to galling or seizing, which is a known failure mode of other types of bearings.
Boulden will be stocking M-161 and M-310 for fast delivery along with Boulden’s service and technical support. M-161 and M-310 add to Boulden’s complete range of composite materials which can cover applications from cryogenic to 1700 F (900 C).
Interested in these materials for your applications or if you would like more information, contact Boulden today!

About Metcar

Metallized Carbon Corporation has been supplying engineered carbon/graphite solutions for severe service lubrication to industrial customers worldwide since 1945. Under the trade name Metcar®, our unique family of solid, oil-free, self-lubricating materials have been under continuous development by Metallized Carbon Corporation for over seventy years. With over seven decades of application engineering experience and field expertise, corporate headquarters and manufacturing facilities in New York, along with manufacturing facilities in Singapore and Mexico, Metcar is strategically situated to provide the global market with the materials it needs to keep the world running.

Comparing Pump Component Composite Materials

There is one material property that can tell you a lot about how a composite material is likely to perform in a pump: The coefficient of thermal expansion (CTE). If the value is too high, the material can deliver inconsistent results in challenging services.

Why CTE?
A low CTE is essential for reliable performance because components like wear ringsthrottle bushings, and vertical pump shaft bearings run with tight clearances. A low CTE allows the material to experience normal frictional heat generation during contacting conditions without significant deformation.

Conversely, it is difficult for a material with a high CTE to maintain a tight clearance. When exposed to normal frictional heat generation or higher temperatures, a high CTE can quickly cause the component to “grow” and close the clearance. When this happens, contact increases, frictional heat generation increases, and premature failure of the component can follow. This is likely what happened to the bushing in figure 1:

Failed vertical pump shaft bushing made from high CTE material

Figure 1: Failed vertical pump shaft bushing made from high CTE material

The difficulty from the user’s perspective is everyone selling materials for pumps claims that their material has a “low CTE.” What this often means is “low CTE relative to other plastics.”
How do you define low CTE?

At Boulden, we define “low CTE” to mean “equal to or lower than the CTE of the metal parts in the pump.” Common metals used to manufacture pumps are carbon steel, 400-series stainless, or 300-series stainless, so we want to be close to or below the CTE for these materials.

Boulden B-Series
Because we think CTE is so important, we developed our B-Series materials with this in mind. If you are currently using PEEK-based components, contact Boulden about upgrading to our B-Series materials. B-835 is our replacement for 30% carbon fiber filled PEEK; B-1050 is our replacement for “abrasive resistant” PEEK blends. B-920 is a non-PEEK proprietary blend, also for potentially dirty services.

CTE of composite materials

Material CTE (in/in/F) CTE (mm/mm/C)
Vespel CR-6100 3.1 5.6
B-920 3.5 6.3
B-1050 5.1 9.2
410 SS 5.5 9.9
Carbon Steel 6.0 10.8
B-835 8.7 15.7
316 SS 8.9 16
30% CF Filled PEEK 15 27

 

Conclusion

A low CTE is critically important to the performance of a composite wear part in a pump and one of the reasons Vespel® CR-6100 has proven so reliable over the past 20 years. Boulden-supplied materials also offer ease of machining, simple installation practices, and material availability. Boulden keeps the material you need in stock and can supply raw material or machined parts including our patented PERF-Seal® with rapid delivery.

If you want to make your pumps more reliable, easier to operate, safer, and more efficient, contact Boulden today. We can help you choose the best material for your application and provide detailed design assistance.

Boulden B-1050 Vertical Pump Shaft Bearings

Last fall, a power plant needed to replace the vertical pump shaft bearings on their cooling water intake pump. They contacted Boulden to find a solution.

Service Conditions

The cooling water intake pumps at the plant pump brackish water from the local harbor. The salty water creates corrosion issues, the silt in the water creates abrasion issues. The line shaft bearings are exposed to potentially high loads from the pump at an operating speed of 1500 rpm.

Boulden B-1050 cooling water intake bearings

Boulden B-1050 cooling water intake bearings

Bearing Design

Boulden selected B-1050 for the application due to its excellent dimensional stability, resistance to abrasive wear in dirty water conditions, and high load carrying capability. Unlike most plastic or composite materials used for this application, B-1050 has a coefficient of thermal expansion less than carbon steel. Boulden has found that a coefficient of thermal expansion less than carbon steel is probably the most important material property for the reliable performance and ease of design of a composite bearing or wear ring. To learn more view the Boulden B-1050 technical data sheet.

Key Properties of Boulden B-1050:

Boulden B-1050 key properties

Tough, wear-resistant shaft bearings from Boulden

Boulden supplied the B-1050 bearings mounted in Duplex Stainless shells. The old bearing spiders were corroded and needed to be re-machined; therefore, the shells were machined to fit after the modification to the spiders. The bearings ran against a 7″ (180 mm) diameter shaft. One line shaft bearing design was 9″ (225 mm) long; the other was 11″ (270 mm) long. The components were manufactured in a few weeks, delivered and installed without issues.

Conclusion

If you are looking for better materials for your vertical shaft bearings, contact Boulden. Consider B-1050 for your cooling water pumps, waste water pumps or other services where you need the ability for the bearings to run in potentially dirty service plus survive off design conditions such as running dry. We have a portfolio of materials with B-Series and Vespel® CR-6100, so whatever your vertical shaft bearing application, we can help.

For consultation on the best material for your application or design assistance, contact Boulden today. We have the material you need in stock and can supply raw material or machined parts with rapid delivery.