GRAPHALLOY Bushings and Bearings

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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.

Thursday, June 12, 2014

GRAPHALLOY® Bearings Operate at -269°C

Turbomachinery International magazine reported on a project at Vienna University of Technology's Atominstitut using GRAPHALLOY at -269°C.

The article - "Maintaining Lubricity at Cryogenic Temperatures" - describes the key role of GRAPHALLOY in building a Rotating Sample Magnetometer to measure magnetic properties of samples, usually at temperatures near zero.

"When designing pumps, compressors, valves and ancillary components for cryogenic applications, one is concerned with more than the ability of the components to withstand the low temperatures without shrinking, becoming brittle, losing strength or cracking. 

Whenever there are moving parts, there is the need to minimize friction and wear, and to prevent sticking or galling. Unlike higher-temperature applications, the use of fluid lubricants in low temperatures is out of the question... 

Recently, the GRAPHALLOY material hit a new record low temperature application in a magnetometer. It was not quite as low as what the CAL will reach, since those can only be achieved in space, but it was not much warmer.

Click here to read the full article.