Flowserve ISC2 Series User Manual
Page 4
To provide lubrication, a film of liquid must always be present
between the seal faces. The sealing surfaces are separated from
each other by the seal liquid film during shaft rotation and in
principle run without contact and thus minimal wear under these
conditions.
1.3 Explosion Protection
The ISC2 mechanical seal is a standard cartridge seal and as
such regarded as a machine element. Machine elements do not
need to comply with Directive 9/9/EC (ATEX 95 product guide)
as these are regarded as an integral part of a larger piece of
machinery (pump, agitator). This has been confirmed by both
the EC ATEX standing committee as well as the European Sealing
Association (ESA).Reference is made to following web-sites:
EC ATEX standing committee:
http://ec.europa.eu/enterprise/atex/rotating.htm
ESA position statement:
http://www.europeansealing.com/statements.html
For applications which require information on expected surface
temperatures of the mechanical seal faces, Flowserve document
“ATEX 137 information declaration” is available upon request.
This document allows users to determine typical surface tem-
peratures based upon seal design, operating conditions and face
materials and may be used by the users to comply with ATEX
1999/92/EC (ATEX 137).
1.4 Functional requirements
The proper functioning of a mechanical seal is only achieved once
the following conditions have been met: