What do the experts say?

HEINZ BLOCH, P.E.
“Magnetic seals are the ONLY practical bearing housing closure.”

“...they (magnetic seals) represent the ideal choice of bearing housing seal to prevent both egress of lube oil and ingress of atmospheric contaminants.”

“Bearing protector / isolators perform better than lip seals and / or labyrinth seals.”

Reference: Bearing Protection Devices and Equipment Reliability, By HEINZ BLOCH, P.E., Consulting Engineer, Published in Pumps and Systems Magazine, September 2001.
   
AESSEAL MagTecta Range Further Information



"AESSEAL, Inc. (Rotherham, U.K.; www.aesseal.com) has unveiled a double-face mechanical seal for bearing isolation, that corrects the shortcomings of the widely used lip and labyrinth seals, and costs less to operate."

Click Here to read what CEP (Chemical Engineering Progress Magazine) have to say about the MagTecta II.

To download the file to disk 'right click' and 'save target as' on the link above to a location on your machine. Once downloaded the file can be opened as normal. (37kb)
"Magnetic seals obtain lubrication and
cooling from the ever-present oil fog that
surrounds oil-lubricated bearings. Properly
designed, using appropriate face materials
and applying suitable selection criteria, they
represent the ideal choice of bearing-housing
seal to prevent both egress of lube oil and
ingress of atmospheric contaminants."

Click Here to read what Heinz Bloch wrote about bearing protectors in Pumps and Systems Magazine.

To download the file to disk 'right click' and 'save target as' on the link above to a location on your machine. Once downloaded the file can be opened as normal. (784 kb)

API 610 is considered, by many, as the premium equipment specification for Centrifugal Pumps in the Petroleum, Petrochemical and Natural Gas Industries. It is reported to be technically equivalent to ISO 13709.

The very latest edition (9th) recognises the need for proper bearing protection. The following text is an API610 v9 specification extract.

5.10.2.7 - Bearing housings for rolling element bearings shall be designed to prevent contamination by moisture, dust and other foreign matter. This shall be achieved without the requirement for external service for example, air purge. Bearing housings shall be equipped with replaceable labyrinth-type or magnetic-type end seals and deflectors where the shaft passes through the housing. Lip-type seals shall not be used.

The seals and deflectors shall be made of non sparking materials. The design of the seals and deflectors shall effectively retain oil in the housing and prevent entry of foreign material into the housing.

5.1.25 - Oil reservoirs and housings that enclose moving lubricated parts such as bearings, shaft seals, highly polished parts, instruments, and control elements shall be designed to minimise contamination by moisture, dust, and other foreign matter during periods of operation and idleness.

AESSEAL anticipated this industry requirement with the introduction of the MagTecta™ in 2002.
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