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 many pump applications.

Vesconite Pumps Resources

Benefits for Pumps

Vesconite does not swell or distort in water.

Vesconite does not delaminate.

Vesconite does not corrode.

Vesconite requires no lubrication for up to 1 minute after start-up.

Vesconite is resistant to oils and fuels.

Vesconite bushings are easy to fit and remove.

Vesconite prolongs shaft life.

Material Comparison

Between the pump impeller and casing wear rings, tight clearances are required. Swelling and corrosion can be an issue with traditional materials.

This is not the case with Vesconite due to its virtually zero water absorption rate and dimensional stability, and no bimetallic corrosion.

Unlike bronze or rubber bushings, fresh and saltwater serves as an effective  lubricant for Vesconite Hilube. This makes it an ideal material for pump bowl bushings and stuffing box bushings.

Vesconite Pumps Case Studies
Independent tests by a major pump manufacturer prove corrosion-free Vesconite Hilube wear rings safely allow reduced running clearances and improve pump efficiency.
APE Pumps, a pump supplier to many countries, including Zambia, Iraq and South Africa, replaced every pump bushing that it was able to with Vesconite. The company had tried many different types of bushings but was impressed with Vesconite’s toughness, long-life and self-lubricating qualities.
When a large energy company in Africa required lineshaft and bowl bearings for condensate pumps at its 4,000 MW power station, it turned to Hitemp 150, an engineered polymer produced by Vesconite Bearings, that can survive temperatures up to 150°C (300°F). The condensate pumps in question reach temperatures of 110°C (230°F), so the contractor to the power producer is satisfied that the pumps will last and that the bearings will not melt, as would be the case with many other polymers.
One of South Africa’s largest independent polyurethane and plastic foam manufacturers restarted an important gear pump, used to pump glue to rebound foam chips, without difficulty after the company’s December-January closed period. Not only that, the Vesconite Hilube pump bushings, which were inspected at the time of the restart, showed no wear.
A large pump original equipment manufacturer compared energy usage on a typical submersible pump when a Vesconite Hilube wear ring was in place and when a bronze wear ring had been installed. The results independently proved Vesconite Hilube’s ability to improve pumping efficiency and decrease electricity usage.
When the team responsible for the maintenance of the irrigation system at one of South Africa’s premier golf courses was confronted with high levels of debris and pumps running dry for periods, it shifted to a high temperature resistant, high wear resistant polymer, Hitemp 150, for replacement pump bowl bushings. The bushings lasted a year without a scratch.
A thermal power station required a low-wearing, low maintenance bearing alternative for a condensate pump assembly.
A Turkish OEM that supplied a Nile River project with one of its pumps that had been fitted with Vesconite Hilube polymer components in late 2018 reports that the line shaft bushings continue to operate well. The project is associated with abrasive water with a large proportion of sand particulates for which hard-wearing Vesconite Hilube is ideal.
A Southern African pump manufacturer has received its order for Vesconite low-swell hard-wearing water-flingers for four of its pump sizes. The manufacturer designed a water flinger (deflector) solution that attaches to the shaft release collar. This results in excess water from the gland packing being deflected as the shaft rotates.
The Australian distributor of Vesconite and Vesconite Hilube continues to supply the company that first proved Vesconite’s suitability for pump applications over 30 years ago. Some 40 to 80 sets of bearings end up in various pumps that this Australian branch of a global pump company uses in repairs or for unique applications, including models of different sizes employed in a variety of conditions.
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