Tag Archives: hilube

Vesconite Hilube Plate Proves Itself in Rotary Vacuum Filter

A large food-processing company replaced several of the polyethylene plates on its rotary vacuum filters with plates made of the low-friction, high-compressive strength polymer known as Vesconite Hilube.


Rotary vacuum filters are used for dewatering, washing and clarification, and rely on a vacuum to suck the water content out of a slurry mixture in which a vacuum drum rotates. After dewatering is completed, a dry cake remains on a cloth-covered drum, while the clarified liquid in the drum is transported out of the drum through a series of pipes.

Vesconite Hilube wear plates have been successfully used at the interface between the vacuum drum and the exiting pipes at the client’s facility.

The processor’s mechanical department maintenance coordinator informs that the 800-millimetre-diameter (31.5 inches) 25-millimetre-thick (1 inch) Vesconite Hilube wear plates need to ensure that there is an adequate seal that prevents the liquid from leaking.

They also need to have sufficient compressive strength to be secured by a trunnion plate, he says, noting that the equipment agent’s wear plates were of a much softer material and that this resulted in wear and eventual leaking.

In addition, they need to have the correct pipe exiting alignment, with 16 holes in place for some of the rotary vacuum drum designs and 14 for other of the designs.

Testing continues to verify the comparative wear life of the polyethylene wear plates and their replacement Vesconite Hilube wear plates.

The processing company’s maintenance coordinator reports that the Vesconite Hilube plates have outlasted the polyethylene plates, but the exact wear life of both the polyethylene and Vesconite Hilube wear plates is unknown. Continue reading Vesconite Hilube Plate Proves Itself in Rotary Vacuum Filter

Vesconite Hilube for Pump Applications

Vesconite Hilube can last up to ten times the life of bronze

Vesconite - Hilube for Spindle PumpsVesconite Hilube is a thermopolymer, designed for particularly difficult operating environments. Hilube is specifically recommended for moist and underwater applications. These include the pump and marine industry, where regular maintenance is not practically feasible or cost-effective. Displaying superior wear life, especially in poorly lubricated and dirty conditions, Vesconite Hilube has been shown to offer up to ten times the life of bronze bushings.

Vesconite Hilube incorporates an internal lubricant that translates into an exceptionally low friction coefficient. With excellent dimensional stability, low wear rates, and a high load-bearing capacity, Hilube excels in difficult applications.


Vesconite Hilube has been used for decades in a wide range of specialized pump bearing applications.

The material thrives in water, keeping to machined sizes without swelling and with zero delamination.

Other advantages are that it does not corrode, and helps prevent the corrosion between metal components especially in salt water; is resistant to oils and fuels; and is easy to machine, fit and remove – and prolongs shaft life.

In addition, it allows dry startup for up to 1 minute.

Vesconite Hilube is recommended for most pump bearing applications, such as:  Continue reading Vesconite Hilube for Pump Applications

Vesconite Hilube Wear Rings Save Money for Pump OEM

Vesconite Hilube Saves Energy Costs for Pump OEM

The installation of Vesconite Hilube wear rings can result in electricity savings that more-than-pay for the wear ring.

picture of hilube wear ringsThis was the result of a study by a large pump original equipment manufacturer (OEM) that compared energy usage on a typical submersible pump when Vesconite Hilube wear rings were in place versus stainless steel wear rings that had been previously installed.

Vesconite Hilube is a low-friction wear-resistant polymer. Wear rings made from the material are designed to seal the pressure leakage of the liquid between the inlet and the impeller and the pump casing, and should result in a higher pumping efficiency due to lower by-pass.

Vesconite Bearing technical pump consultant Phillip de Villiers was pleased when the pump OEM’s results independently proved Vesconite Hilube’s ability to improve pumping efficiency and decrease electricity usage.

The study showed a 0.11kW/h energy reduction when operation of the pump with a large diameter stainless steel wear was compared with operation of the same pump type with a dimensionally-identical Vesconite Hilube wear ring.

Assuming the Vesconite Hilube wear rings use on an industrial pump, operating 24 hours a day, 365 days a year, the electricity savings from installing a Vesconite Hilube wear ring add up, particularly when the pump is operated in a jurisdictions in which electricity charges are high.

In the specific pump that was studied by the OEM, the wear ring would have a three-month payback even where a low electricity cost was assumed, notes De Villiers.

He adds that electricity savings for a five-to-ten stage submersible pump can be significant if the electricity savings of each stage are added together.

With concerns about global CO2 emissions from electricity generation – which reached 12Gt in 2010 – as well as an awareness that pumps account for 10% of global electrical energy consumption, technological interventions are valued by pump manufacturers and pump users.

They are also of interest to state and national governments that are interested in reducing carbon emissions to keep global warming under 1.5°C.


The original article can be found on Vesconite’s website.

For more information about Vesconite’s Hilube or other bearings and bushings, please contact Gallagher Fluid Seals’ engineering department.

Vesconite Bushings Ensure Glue Pump Restarts Successfully After Down Time

One of Vesconite’s customers, a large independent polyurethane and plastic foam manufacturer, restarted an important gear pump without difficulty after the company’s closed period from December through January. This gear pump is used to pump glue to rebound foam chips.

Because it pumps viscous adhesive liquid at one of the company’s two chip plants, the gear pump can fail to restart if component parts are immobilized by glue after a long period of inactivity.

Viking Pump Restarts With Ease With Hilube

However, with the introduction of Vesconite Hilube polymer bushings in the well-known Viking internal gear pump, the company’s pump restarted with ease.

Vesconite HilubeNot only that, the Vesconite Hilube pump bushings, which were inspected at the time of the restart, showed no wear.

The foam manufacturer service manager noted that the self-lubricating hard-wearing Vesconite Hilube polymer bushings replaced carbon graphite ones, which had tended to crack in the warm operating environment, in which the viscous glue-like chemicals needed to be heated to be applied to the foam chips.

This did not occur with the Vesconite Hilube, which had the added advantage of being self-lubricating and being able to move in the high-friction environment.

“You can’t use an ordinary plastic bush,” says the service manager.

The gum dries out and sticks to the bush if you try. After the December break and after long weekends, the gear pumps ceased to operate before we used Vesconite Hilube.

The company manufacturers 800 tons per year of chip mattress blocks, which are used for bus seats, gymnasium mats, restaurant seats, mattresses, and other high-density furniture/bedding applications.

The service manager said that the Vesconite Hilube bushing was currently on it’s eight month, and is pleased it has survived and continued to operate after the holiday period.

He has installed Vesconite Hilube bushings on several gear pumps at the factory, including several pumps where temperatures can reach 65°C.

He believes that this is a low-maintenance solution for a challenging operating environment.


For the original article, visit Vesconite’s website.

Gallagher Fluid Seals is an authorized distributor for Vesconite products. For information or to see if it is a right fit for your application, contact us today.

Vesconite Bushings Fitted to Guinness World Record Steam Train

About Vesconite’s Hilube

Internally-lubricated, the ultra-low friction Hilube polymer has no stick-slip, doesn’t swell and provides a wear life ten times that of bronze. It machines to +/-0.001″, making it ideal for applications with tight tolerances.

Breaking World Records with Hilube

The team that was awarded the Guinness World Record in 2017 for the longest distance covered by a miniature steam train is setting its sights on improving its record.steam engine vesconite

Keyser Locomotive Works, together with the Pietermaritzburg Model Engineering Society was able to cover 330km (205 miles) in 24 hours in its record-breaking attempt, which outstripped the previous 1994 record of 269km covered in 24 hours.

It did so for a number of reasons, one of which was the self-lubricating Vesconite polymer bushings that were fitted to the connecting and coupling rods.

These internal, hard-to-reach turning components did not need to be oiled, and this helped reduce stopping times during the record attempt.

“You can’t oil these bushings on the run,” says the locomotive owner Andries Keyser.

This was not the case with many of the original bronze bushings that had to be oiled every hour when the locomotives stopped and the drivers were changed.

Six of the main crank bushings are currently made from Vesconite polymer bushings on the record-breaking locomotive named Doreen, but the intention is to replace all the bushings with Vesconite eventually so as to reduce oiling requirements in future record-breaking bids.

“The Vesconite has no heat expansion and, using a sloppy fit, didn’t heat up at all” Keyser notes.

“The engine output was not compromised in any way and still runs today on the same bushes, two years and many kilometers later,” he says.

Looking to the future with Vesconite Hilube

Another innovation that will assist Keyser to further improve the record is the fact that he is building the longest straightest track that he can in the Stellenbosch Winelands, in South Africa. This will enable the locomotive to run at higher speeds on a track gauge of only 184mm.

Known as the Winelands Light Railway, Keyser is establishing a theme park with 1/3-scale trains, matching buildings, bridges and tunnels, and a hobbies expo for locomotive enthusiasts once a year. Presently there are four steam and one electric locomotive in the engine shed, with 13 wagons able to haul up to 50 people per train. Everything is hand made and based on narrow-gauge prototypes from all over the world.

Starting on the 14th of December 2019, the park will be open on weekends, public and school holidays if the weather allows. This unique attraction aims to become the biggest family-friendly destination in the Western Cape within the next 10 years. 

Keyser will make another world-record attempt sometime in the near future, and expects that between 30 and 60km will be added to the current distance record.


The original article was written by Vesconite and can be found on their blog here.

Gallagher Fluid Seals is a preferred distributor of Vesconite in the United States. For more information about their bearings or bushings, please contact our engineering department.

Vesconite Bushings for Railway, Transportation

Vesconite has over several decades been successfully used in a number of railway applications. The material’s self-lubricating properties make it well suited to railway components that are prone to metal on metal wear and require regular greasing. Not only will a switch to Vesconite bushings avoid long periods of downtime, the noise and squeal issues commonly associated with rolling stock, is significantly reduced. With a resultant reduction in rolling resistance, considerable power savings have been noted with the use of Vesconite components.

Vesconite Hilube on Tram Drive Bushings

Vesconite - Tram Bushings for RailAustralia – An Australian tram operator continues to order approximately 100 Vesconite Hilube motor axle bushings a year, following its successful introduction to the product in 2006. The motor axle bushings, which require no lubrication and are wear resistant, have completely replaced the standard metal main drive H-class-tram bushings, which had been in use prior to the introduction of the polymer product.

Continue reading Vesconite Bushings for Railway, Transportation

Vesconite for Transportation/Automotive Industries

Transportation / Automotive bushings require regular maintenance and greasing, and are prone to wear especially in wet or dirty conditions. Self-lubricating Vesconite and Vesconite Hilube eliminate the need for continual greasing and at the same time increases bushing life. Vesconite and Vesconite Hilube are tough and durable and perform well under the mechanical stress that occurs on vehicle suspension systems.

Rail container trailers fitted with Vesconite

Vesconite Pivot BushingsSouth Africa – Vesconite flanged pivot bushings have been successfully installed and used on container trailers at the national rail utility. The Vesconite bushes, with a flange of 205 mm diameter and a bore of 165 mm, were fitted to the walking beam center pivot bearing that equalizes component parts of the rear axle bogies. This heavy duty application required a material which had high load carrying capacity, low friction, high wear resistance and good dimensional stability. Vesconite, with all these characteristics, was used on the trailers that are used to transport 12-m-long general purpose containers.

Continue reading Vesconite for Transportation/Automotive Industries

Vesconite Ensures Smoother Operation

Vesconite HilubeUSA – An aeration windmill manufacturer installed Vesconite Hilube bushings on its windmills, leading to smoother and more efficient operation. The bushings are an essential component in aeration windmills, which aerate ponds in private and public spaces, since fan rotation is key to ensuring that the diaphragm moves up; compressed air is taken in; and the compressor builds up pressure, which is released into the air line leading to the water. Because of this, the windmills are more efficient at reducing algae and foul smells, controlling mosquitos and creating a healthier environment for fish.

Vesconite for Renewable Energy

Vesconite Hilube bushings reduce energy costs in renewable energy applications. Turbines associated with these applications need to move rapidly and easily to produce efficient power, meaning wind, wave, tidal and current-driven turbines require a low coefficient of friction. Reduced energy losses as a result of the lower friction present in Vesconite Hilube bushings, allow turbines to rotate easily, producing electricity faster and at a reduced cost.

Continue reading Vesconite Ensures Smoother Operation

Vesconite Rudder Bearings Reduce Wear

Brazil, Paraguay and Argentina –  The waters of the Parana River tend to be wide and deep, with significant suspended debris and sand. Due to these abrasive conditions, rudder bearings on tug boats operating on the river are susceptible to rapid wear. The result is frequent dry docking for repairs. In response, Vesconite bushings have been successfully fitted to 20 tug boats working the Parana River. The combination of exceptionally low wear, self-lubrication and easy installation makes it an ideal material for this application.

Vesconite for Marine Applications

Rudder BearingVesconite, and Vesconite Hilube in particular, are ideal for the submerged and corrosive conditions of the marine industry. Suited to both dry and underwater applications, Vesconite’s internal lubricants allow for prolonged life where the setting is characterized by irregular greasing schedules, or no greasing at all. Unlike most bearing materials, Vesconite offers long wear life and a high load-bearing capacity with no distortion or delamination, despite the wet and abrasive working environment. Vesconite is easily removed and refitted, saving in costly downtime.

Continue reading Vesconite Rudder Bearings Reduce Wear

Vesconite Pump Application Case Studies

Vesconite - Hilube for Pump ApplicationsThermal Power Station Condensate Pump

Texas, USA – A thermal power station required a high-wearing, low maintenance bearing alternative for a condensate pump assembly. The line shaft and pump bowl bearings used in this vertical spindle pump operate in pure water conditions at a temperature ranging between 30˚C and 60˚C (86°F to 140°F). Removal and maintenance cost on the pump are high. Vesconite Hilube bearings were manufactured and fitted. Resultant performance has been impressive – the replacement bearings have run without fault for four years, on a pump assembly that has a seven yearly maintenance rebuild schedule.

Water Utility Uses Hilube on Vertical Spindle Pumps

Vesconite - Hilube for Spindle Pumps

Texas, USA – A water utility in Texas had over the years experimented with different  grades of nylon bearings in its vertical spindle pumps, but with little success. The pumps operated in the abrasive conditions found in pit-wells. The combination of debris and sand would eventually lead to excessive wear of the original bushings and eventual seizure. The original parts were subsequently replaced with Vesconite Hilube, which requires no lubrication, does not swell and can operate in dirty conditions as characterized by the above. The re-fitted pumps have since been running without incident for over a year now.


Why Use Vesconite in Pumps?

Vesconite has been used for decades in a wide range of specialized pump bushing applications. The material thrives in water and exhibits excellent dimensional stability, with zero delamination. The result is low downtime and associated hassle factor. Its friction coefficient range of 0.1 – 0.2 allows for dry starting – an issue commonly associated with high wear rates in traditional bushing materials. Corrosion of the bushing is entirely eliminated with Vesconite, Vesconite Hilube is recommended for most pump applications.

Continue reading Vesconite Pump Application Case Studies