Case Rings and Wear Rings
Pump wear rings and case rings made from GRAPHALLOY® materials can significantly improve the reliability and efficiency of both horizontal and vertical pumps. The unique properties of the Graphalloy material, a range of self-lubricating graphite-metal alloys, benefit users across a wide variety of pump services.
Read more here.
GRAPHALLOY 'Disaster' Bushings for Improved Safety in Case of Seal Failure
“Disaster Bushings” are used in pumps outside the seal to minimize product leakage to the environment in the event of a seal failure. GRAPHALLOY® materials provide ideal properties for a disaster bushing.
GRAPHALLOY Bushings and Bearings
Showing posts with label pumps. Show all posts
Showing posts with label pumps. Show all posts
Friday, November 8, 2019
Wednesday, March 15, 2017
Desalination Plant Pumps Upgraded with GRAPHALLOY NSF® Certified Bearings
A major pump manufacturer’s Water Systems Group, which focuses on the
commercial and industrial water markets, won a contract to provide
vertical turbine pumps for a desalination facility at a publicly-owned
water agency.
The pumps would experience dry starts with the possibility of
prolonged dry running. In addition, the bearings needed to be NSF
certified. These conditions led the pump company to replace their
standard bronze bearings with GRAPHALLOY NSF certified bearings.
The unique properties of GRAPHALLOY bearings and wear rings enable pumps to run dry and survive upsets and flashing that cause metal bearings to fail.
Read more...
The unique properties of GRAPHALLOY bearings and wear rings enable pumps to run dry and survive upsets and flashing that cause metal bearings to fail.
Read more...
Thursday, March 17, 2016
David Moser Joins Sales Team at GRAPHALLOY
Graphite Metallizing Corporation, the manufacturer of self-lubricating GRAPHALLOY® bushing materials for pumps
and process equipment, has appointed David Moser as Sales Engineering
Representative for Texas, Louisiana and southern Arkansas.
Moser holds a B.S. degree in Mechanical
Engineering Technology from Southern Polytechnic State University. He
has has over twenty years experience in the industrial market place,
much of it with a manufacturer of centrifugal pumps. Moser will be based
out of his Houston office.
“David's extensive experience with industrial
machinery will help our customers use GRAPHALLOY to achieve greater
equipment reliability,” stated Eben Walker, General Manager of Graphite
Metallizing. "We are pleased to have David join our team.”
Graphite Metallizing Corporation of Yonkers,
NY has been solving tough bearing problems for over 100 years. The
company began in 1913 when two engineers developed a method for putting
molten metal into carbon to create a new material called GRAPHALLOY, a
graphite/metal alloy.
GRAPHALLOY bearings have operated for 20 years and longer in some applications. Standard designs are available but most GRAPHALLOY products are custom designed to the unique requirements of the specific application. Graphite Metallizing Corporation is ISO certified.
Thursday, February 18, 2016
GRAPHALLOY® at Asia Turbomachinery & Pump Symposium
Graphite Metalllzing Corporation will be exhibiting at the 2016 Asia Turbomachinery & Pump Symposium from February 22 - 25. The event will be held at the Marina Bay Sands in Singapore.
Please stop by and visit us at Booth #614.
For more information about this Symposium, click here.
Please stop by and visit us at Booth #614.
For more information about this Symposium, click here.
Thursday, June 19, 2014
GRAPHALLOY Material Receives Drinking Water System Approval
Graphite Metallizing Corporation continues to expand the GRAPHALLOY® product line to meet drinking water regulations worldwide.
Graphite Metallizing Corporation is pleased to announce that GRAPHALLOY® Grade GM 695.3 Bearings have been granted Water Regulations Advisory Scheme (WRAS) approval. This follows the recent certification of NSF/ANSI grades as Graphite Metallizing continues to expand the GRAPHALLOY product line to meet drinking water regulations worldwide.
Through a stringent testing process, WRAS approval indicates that the GRAPHALLOY bearings comply with the high standards set out by the water regulations within the United Kingdom.
In addition, WRAS approval specifies that GRAPHALLOY GM 695.3 Bearings are “suitable for contact with wholesome water for domestic purposes” because it has met the requirements of BS 6920-1:2000 (“Suitability of non-metallic products for use in contact with water intended for human consumption with regard to their effect on the quality of water”).
Bushings made of WRAS approved GRAPHALLOY are used in municipal water system pumps. These bushings have been found to operate for more than 10 years in these services and to provide solutions that eliminate requirements for lubrication systems, including pre-lubrication.
Graphite Metallizing Corporation is pleased to announce that GRAPHALLOY® Grade GM 695.3 Bearings have been granted Water Regulations Advisory Scheme (WRAS) approval. This follows the recent certification of NSF/ANSI grades as Graphite Metallizing continues to expand the GRAPHALLOY product line to meet drinking water regulations worldwide.
Through a stringent testing process, WRAS approval indicates that the GRAPHALLOY bearings comply with the high standards set out by the water regulations within the United Kingdom.
In addition, WRAS approval specifies that GRAPHALLOY GM 695.3 Bearings are “suitable for contact with wholesome water for domestic purposes” because it has met the requirements of BS 6920-1:2000 (“Suitability of non-metallic products for use in contact with water intended for human consumption with regard to their effect on the quality of water”).
Bushings made of WRAS approved GRAPHALLOY are used in municipal water system pumps. These bushings have been found to operate for more than 10 years in these services and to provide solutions that eliminate requirements for lubrication systems, including pre-lubrication.
Monday, October 7, 2013
Pumping New Life into a Failed Pump
Modern Pumping Today
August 2013
Written by Drew Robb, a freelance writer specializing in engineering and technology
A Caribbean refinery had been using a Union Pump Company (now SPX Clyde Union) 4×6 (4-inch [101.6 millimeter] discharge, 6-inch [152.4 millimeter] suction) Multi-Phase Extraction (MPE), seven-stage centrifugal charge pump. Charge pumps are used to maintain the inlet pressure on main hydraulic pumps in order to prevent cavitation.
Normally such a pump in refinery operation would have been expected to last about five years between overhauls. This one had lasted perhaps a year before being taken off line due to reduced performance. When the charge pump arrived in a shipping crate at Chalmers and Kubeck’s (C&K) main service center in Aston, Pennsylvania, it had clearly seen better days.
“It came in partially disassembled and heavily rusted,” says Helen T. Eife, C&K’s manager for engineered pumps. “It looked like it had been sitting outside for a while.”
An inspection determined that the failure was caused by using the wrong type of material for inserts on the wear rings. A complete refurbishment, including installing GRAPHALLOY® inserts, returned to pump to operational status.
Read more...
August 2013
Written by Drew Robb, a freelance writer specializing in engineering and technology
A Caribbean refinery had been using a Union Pump Company (now SPX Clyde Union) 4×6 (4-inch [101.6 millimeter] discharge, 6-inch [152.4 millimeter] suction) Multi-Phase Extraction (MPE), seven-stage centrifugal charge pump. Charge pumps are used to maintain the inlet pressure on main hydraulic pumps in order to prevent cavitation.
Normally such a pump in refinery operation would have been expected to last about five years between overhauls. This one had lasted perhaps a year before being taken off line due to reduced performance. When the charge pump arrived in a shipping crate at Chalmers and Kubeck’s (C&K) main service center in Aston, Pennsylvania, it had clearly seen better days.
“It came in partially disassembled and heavily rusted,” says Helen T. Eife, C&K’s manager for engineered pumps. “It looked like it had been sitting outside for a while.”
An inspection determined that the failure was caused by using the wrong type of material for inserts on the wear rings. A complete refurbishment, including installing GRAPHALLOY® inserts, returned to pump to operational status.
Read more...
Thursday, January 3, 2013
GRAPHALLOY Provides Advantages in Pump Bushings and Wear Rings
GRAPHALLOY®, a graphite/metal alloy, is used extensively for pump bushings and wear rings. It offers two key advantages for pumping applications:
1. GRAPHALLOY enables pumps that run dry, flash, or handle extremely low viscosity fluids to survive without damage. Numerous case histories and pump manufacturer test results confirm that GRAPHALLOY performs where plastics are unable to stand up and metal parts seize disastrously.
2. GRAPHALLOY enables rings and bushings to be designed with tighter clearances which can improve efficiency, increase output, reduce vibration, throttle seal cavities, or act as a seal backup. GRAPHALLOY is non galling and dimensionally stable and enables pumps to operate at tight fits without the risk of metal-on-metal rubs or seizure.
Click here to learn more about the use of GRAPHALLOY in pumping applications.
2. GRAPHALLOY enables rings and bushings to be designed with tighter clearances which can improve efficiency, increase output, reduce vibration, throttle seal cavities, or act as a seal backup. GRAPHALLOY is non galling and dimensionally stable and enables pumps to operate at tight fits without the risk of metal-on-metal rubs or seizure.
Click here to learn more about the use of GRAPHALLOY in pumping applications.
Wednesday, September 19, 2012
GRAPHALLOY at the Houston Pump Symposium
Graphite Metallizing Corporation, manufacturer of GRAPHALLOY® bearings and bushings, will be exhibiting at the 28th Annual Pump Users Symposium in Houston, TX. This symposium will be held at the George R. Brown Convention Center from Monday, September 24 through Thursday, September 27.
Engineers from Graphite Metallizing will be available to discuss the success of GRAPHALLOY, a graphite/metal alloy, in difficult pump applications. GRAPHALLOY® self-lubricating wear parts keep pumps from seizing during dry-run, low-flow, start-up, slow roll and shutdown. These are conditions that cause metal to metal pumps or plastic wear parts to fail, sometimes catastrophically.
GRAPHALLOY® wear rings and bushings operate at longer intervals without the need for replacements or maintenance which helps reduce downtime and maintenance expenses. In addition, GRAPHALLOY® operates successfully in temperatures from -400°F to +1000°F (-240°C to 535°C).
If you have an application where service and maintenance tasks are cumbersome or difficult to perform, speak with a GRAPHALLOY® representative at Booth #1715.
Engineers from Graphite Metallizing will be available to discuss the success of GRAPHALLOY, a graphite/metal alloy, in difficult pump applications. GRAPHALLOY® self-lubricating wear parts keep pumps from seizing during dry-run, low-flow, start-up, slow roll and shutdown. These are conditions that cause metal to metal pumps or plastic wear parts to fail, sometimes catastrophically.
GRAPHALLOY® wear rings and bushings operate at longer intervals without the need for replacements or maintenance which helps reduce downtime and maintenance expenses. In addition, GRAPHALLOY® operates successfully in temperatures from -400°F to +1000°F (-240°C to 535°C).
If you have an application where service and maintenance tasks are cumbersome or difficult to perform, speak with a GRAPHALLOY® representative at Booth #1715.
Wednesday, February 9, 2011
Specialy Materials Help Improve Pump Reliability and Save Energy
GRAPHALLOY® allows for reduction of clearances
Efficiency degradation in pumps can be related to three areas. Worn clearances between the wear rings of the impeller and the casing can increase leakage and drop the volumetric efficiency of the pump. Rough, rusty and damaged internals increase friction, reducing hydraulic efficiency. Finally, rubs, galling, friction in the mechanical seals and bearings, can result in the reduction of mechanical efficiency.
Together, these three pumping problems reduce the available flow, lower pressure and/or require more power consumption. These three issues also make a pump less reliable. Pump efficiency and reliability are often intertwined.
Click here to continue reading this article from Pumps & Systems
Efficiency degradation in pumps can be related to three areas. Worn clearances between the wear rings of the impeller and the casing can increase leakage and drop the volumetric efficiency of the pump. Rough, rusty and damaged internals increase friction, reducing hydraulic efficiency. Finally, rubs, galling, friction in the mechanical seals and bearings, can result in the reduction of mechanical efficiency.
Together, these three pumping problems reduce the available flow, lower pressure and/or require more power consumption. These three issues also make a pump less reliable. Pump efficiency and reliability are often intertwined.
Click here to continue reading this article from Pumps & Systems
Tuesday, October 19, 2010
GRAPHALLOY® Introduces NSF® Certified Grades For Pumps
Used in Pump Bushings and Bearings for Vertical and Horizontal Pumps
Graphite Metallizing Corporation, the manufacturer of self-lubricating GRAPHALLOY® bushing materials, is pleased to announce that NSF® International, has just certified two grades of GRAPHALLOY material for use in municipal well pumps and water treatment plant applications.
The two newly certified GRAPHALLOY Grades are certified to NSF/ANSI Standard 61 - “Drinking Water System Components/Health Effects” - and approved in the category for Multiple Water Contact Materials (MLTPL) up to 180˚F.
NSF certification is the result of Graphite Metallizing’s rigorous product testing to ensure the highest quality GRAPHALLOY products for the market. These newly certified grades are used in the manufacture of pump bushings and bearings for both vertical and horizontal pumps.
GRAPHALLOY is currently the product of choice for many deep well water pump applications in the western U.S., Hawaii and around the world.
NSF International is the independent, not-for-profit/non-governmental organization that provides materials evaluation, standards testing and product certification services involving public health and safety issues.
Graphite Metallizing Corporation, a global leader in the manufacture of self-lubricating bushings and bearings for almost a century, produces GRAPHALLOY, a graphite/metal alloy bearing material used in the manufacture of self-lubricating bearings and components for pumps, machinery, and process systems.
Graphite Metallizing Corporation, the manufacturer of self-lubricating GRAPHALLOY® bushing materials, is pleased to announce that NSF® International, has just certified two grades of GRAPHALLOY material for use in municipal well pumps and water treatment plant applications.
The two newly certified GRAPHALLOY Grades are certified to NSF/ANSI Standard 61 - “Drinking Water System Components/Health Effects” - and approved in the category for Multiple Water Contact Materials (MLTPL) up to 180˚F.
NSF certification is the result of Graphite Metallizing’s rigorous product testing to ensure the highest quality GRAPHALLOY products for the market. These newly certified grades are used in the manufacture of pump bushings and bearings for both vertical and horizontal pumps.
GRAPHALLOY is currently the product of choice for many deep well water pump applications in the western U.S., Hawaii and around the world.
NSF International is the independent, not-for-profit/non-governmental organization that provides materials evaluation, standards testing and product certification services involving public health and safety issues.
Graphite Metallizing Corporation, a global leader in the manufacture of self-lubricating bushings and bearings for almost a century, produces GRAPHALLOY, a graphite/metal alloy bearing material used in the manufacture of self-lubricating bearings and components for pumps, machinery, and process systems.
Thursday, September 2, 2010
Chemical Plant Experiences Bushing Failure in Gear Pumps
The Competition Said "No" but GRAPHALLOY® Said "Yes"
A chemical plant in Tennessee was experiencing rapid bushing failure in their gear pumps. These bushings were failing after only a few weeks of operation.
When plant representatives contacted this carbon bushing manufacturer about the problem, they were told that there was "no solution". The bushing manufacturer - our competitor - claimed that the viscosity of the polymer being pumped was simply too thick.
Unhappy with this response, the chemical plant engineers contacted Graphite Metallizing for assistance. After studying the problem, our engineers promptly responded by saying "yes, we can help" and that GRAPHALLOY bushings were the solution.
The pump that was failing was a positive displacement, herringbone-type gear pump with
internal bushings lubricated by the pumped liquid. The pumpage is a polymer with heavy viscosity (150 -10,000 CPS) similar to a thick latex paint. The temperature can range from 80 degrees to 140 degrees F with a speed of 520 -1,750 RPMs and a load of 155 - 1,980 pounds. This pump has very high bushing loads because of the meshing gear forces. The calculated PV values were up to 500,000 - over four times the maximum recommended level for GRAPHALLOY in submerged services.
The GRAPHALLOY engineers provided a solution designed for applications involving the transfer of viscous liquids. Grade GM 119.3 bushings were recommended because of their load-bearing and corrosion-resistant capabilities. GRAPHALLOY engineers also recommended slight design changes to improve reliability.
The initial order was shipped to the customer and immediately installed.
The pumps fitted with GRAPHALLOY bushings have been operating for over one year without failure...six times the life of the competitor's bushings.
The success of these GRAPHALLOY bearings demonstrates the potential for GRAPHALLOY upgrades in chemical plants. If you have a pump that may benefit from GRAPHALLOY, please contact us with details about your application.
A chemical plant in Tennessee was experiencing rapid bushing failure in their gear pumps. These bushings were failing after only a few weeks of operation.
When plant representatives contacted this carbon bushing manufacturer about the problem, they were told that there was "no solution". The bushing manufacturer - our competitor - claimed that the viscosity of the polymer being pumped was simply too thick.
Unhappy with this response, the chemical plant engineers contacted Graphite Metallizing for assistance. After studying the problem, our engineers promptly responded by saying "yes, we can help" and that GRAPHALLOY bushings were the solution.
The pump that was failing was a positive displacement, herringbone-type gear pump with
internal bushings lubricated by the pumped liquid. The pumpage is a polymer with heavy viscosity (150 -10,000 CPS) similar to a thick latex paint. The temperature can range from 80 degrees to 140 degrees F with a speed of 520 -1,750 RPMs and a load of 155 - 1,980 pounds. This pump has very high bushing loads because of the meshing gear forces. The calculated PV values were up to 500,000 - over four times the maximum recommended level for GRAPHALLOY in submerged services.The GRAPHALLOY engineers provided a solution designed for applications involving the transfer of viscous liquids. Grade GM 119.3 bushings were recommended because of their load-bearing and corrosion-resistant capabilities. GRAPHALLOY engineers also recommended slight design changes to improve reliability.
The initial order was shipped to the customer and immediately installed.
The pumps fitted with GRAPHALLOY bushings have been operating for over one year without failure...six times the life of the competitor's bushings.
The success of these GRAPHALLOY bearings demonstrates the potential for GRAPHALLOY upgrades in chemical plants. If you have a pump that may benefit from GRAPHALLOY, please contact us with details about your application.
Friday, December 26, 2008
How will Graphalloy handle our jet fuel pump application?
The principal bearing issue for Jet fuel is its very low specific gravity which makes jet fuel a poor lubricant.
Graphalloy bearings have many applications in very low gravity pumpages (lng, ethane, propane, benzene, CO2 etc.). Graphalloy is excellent for these applications because in these low specific gravity fluids Graphalloy provides a margin of safety allowing moving parts to contact without galling or seizing.
We have a history with aircraft fuel gear pumps (from memory I think these go back to the 60's). Our primarily pump business is in high HP centrifugal boiler feed and process pumps (vertical and horizontal) where low lubricity, flashing or run dry conditions are a possibility. Graphalloy bearings will allow the pump to survive an upset. So we have lots of related experience and are confident that the materials can handle a jet fuel pump but we encourage you to do you own testing in as close to real world environment as possible.
We mostly supply finished bearings/bushings and generally these are custom sized for a specific manufacturer's equipment. Pumps are a large part of our bushing applications. The key Graphalloy material advantage is the ability to run dry or in very light fluids (jet fuel for example) without galling. This permits the pump to run dry for a period and then re-establish pumping without failing. (FYI http://www.graphalloy.com/html/pump.html ).
For a metal pump, the usual design is to install, with a press fit, directly into the housing of the pump. The bushings can be supplied with a metal backing but this is normally not necessary. One advantage to the press fit installation directly into the housing of the pump is that as the temperature of the housing changes the bearing can be designed to maintain both secure mounting and a constant clearance to the shaft over a wide range of operating conditions.
In order to proceed to a design, our engineers will need: pump cross sections and dimensions on housing and shafts, materials of construction, rpm, expected loads and pumpages.
Graphalloy bearings have many applications in very low gravity pumpages (lng, ethane, propane, benzene, CO2 etc.). Graphalloy is excellent for these applications because in these low specific gravity fluids Graphalloy provides a margin of safety allowing moving parts to contact without galling or seizing.
We have a history with aircraft fuel gear pumps (from memory I think these go back to the 60's). Our primarily pump business is in high HP centrifugal boiler feed and process pumps (vertical and horizontal) where low lubricity, flashing or run dry conditions are a possibility. Graphalloy bearings will allow the pump to survive an upset. So we have lots of related experience and are confident that the materials can handle a jet fuel pump but we encourage you to do you own testing in as close to real world environment as possible.
We mostly supply finished bearings/bushings and generally these are custom sized for a specific manufacturer's equipment. Pumps are a large part of our bushing applications. The key Graphalloy material advantage is the ability to run dry or in very light fluids (jet fuel for example) without galling. This permits the pump to run dry for a period and then re-establish pumping without failing. (FYI http://www.graphalloy.com/html/pump.html ).
For a metal pump, the usual design is to install, with a press fit, directly into the housing of the pump. The bushings can be supplied with a metal backing but this is normally not necessary. One advantage to the press fit installation directly into the housing of the pump is that as the temperature of the housing changes the bearing can be designed to maintain both secure mounting and a constant clearance to the shaft over a wide range of operating conditions.
In order to proceed to a design, our engineers will need: pump cross sections and dimensions on housing and shafts, materials of construction, rpm, expected loads and pumpages.
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