T R EL L EB O RG S E A L I N G S O LU T I O N S
Flexfinish
™
UNIQUE FINISHING SOLUTION FOR LARGE DIAMETER O-RINGS
A new surface finishing option from Trelleborg Sealing Solutions virtually eradicates
leak paths, offering customers increased performance and extended life in high vacuum
environments or toxic and explosive gas applications.
Leak paths can be a problem in any sealing environment,
reducing performance and sometimes leading to failure,
replacement or redesign. Certain applications, however,
require an additional level of security and peace of mind.
Traditionally, tumbling is used for small O-Rings and is useful
for high-vacuum or gas applications. However, large diameter
O-Rings become knotted using this method, so grinding is
employed. This can lead to cater-cornered scratches, which
act as leak paths in high-vacuum applications.
Flexfinish™ employs a unique combination of techniques to
give large diameter seals an outstandingly even surface finish
and the lowest possible flash height.
In combination with Trelleborg’s unique FlexiMold™ process,
O-Rings can be produced from 200 mm / 7.874 inches to
almost infinite diameters with the full visual and dimensional
integrity of a molded product, while incurring no additional
tooling costs.
Features:
• Designed with high vacuum, explosive, toxic gas and
semiconductor applications in mind
• Offers a smoother surface finish than traditional methods,
virtually eradicating leak paths
• Flash heights in accordance with ISO 3601-3 grade S
• Surface quality to ISO 3601-3 grade N or S for O-Rings with
greater than 200 mm / 7.874 inches inside diameters
• Improves performance for high vacuum environments
• Increases safety for toxic and explosive gas applications
• Can be combined with Trelleborg Sealing Solutions
proprietary FlexiMold™ technology
• O-Rings can conform to ISO 3601-1 or other national
standard sizes upon request
• Available in FKM, NBR, EPDM, Isolast® FFKM and other
materials upon request
YO U R PA R T N ER F O R S E A L I N G T EC H N O LO GY
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OUTSTANDING SURFACE FINISH QUALITY GIVING IMPROVED APPLICATION PERFORMANCE
O-Ring without surface and deflashing
treatment showing flash
O-Ring following traditional deflashing
methods with probable leak paths
O-Ring following Flexfinish™ process with
smooth surface finish and flash heights
down to grade S
Case Study: Planetary Reactor
Sealing/O-Ring
Process Vacuum
Chamber
Vacuum
Side
Turbo Pump
Fore Vacuum Pump
Over
pressure
after the
pump
Planetary reactor (source: Aixtron SE)
Pump Purge (N2)
Washer/Burner
The diagram shows a high vacuum chamber
including a fore pump and a turbo pump. O-Rings
produced using FlexfinishTM prevent leak paths for
gases, ensuring maximum sealing integrity.
LARGE DIAMETER SEALS: FLEXIMOLD™
O-Rings manufactured using the unique FlexiMold™ process
additional tooling costs are charged. FlexiMold™ seals are
available in a wide variety of elastomer materials, including
the proprietary Isolast® FFKM range
and high performance Resifluor™
fluoroelastomers.
99GBY5BROEE0514
offer the full visual and dimensional integrity of a molded
product and are available from 200 mm / 7.874 inches
to almost infinite diameters or with ISO 3601-1 standard
sizes. When designed to a standard cross section size, no
© 2014 Trelleborg Group. At time of publication the information contained in this literature is believed to be correct and accurate.
Vacuum Chamber Door
W W W.T S S.T R EL L EB O RG .C O M
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