The Silcosteel
®
-UHV layer is rugged and durable enough to stand up to the sealing requirements
needed to attain a UHV environment. Figure 2 shows the knife-edge of a Silcosteel
®
-UHV-treated
Conflat
®
sealing surface. The knife-edge penetrates and seals in the copper O-ring seatedwithin
the Conflat
®
surface. Even aftermultiple executions of this sealing process, the Silcosteel
®
-UHV
layer remains intact.
Initial workwith applying a Silcosteel
®
-UHV layer to Conflat
®
fitting bolts—without using anti-seize
material—has demonstrated a decrease in galling. After sealing and thermal cycling, the bolts
were easily removed from the Conflat
®
flangewithout galling.
Silcosteel
®
-UHV treatment is a custom service, available exclusively fromRestek Corporation. For
information on treating system componentswith Silcosteel
®
-UHV passivation, contact Restek, or
your Restek representative.
Restek (U.S.):
110 Benner Circle
Bellefonte, PA 16823
800-356-1688
• 814-353-1300
fax: 814-353-1309
Restek France:
phone: 01 60 78 32 10
Restek GmbH:
49 06172 2797 0
Thames Restek U.K., Ltd.:
01494 563377
Restek Ireland:
44 28 9081 4576
Lit. Cat. #
59532
©Copyright 2003,
RestekCorporation
Restek trademarks:
Silcosteel, Siltek, Sulfinert, and the
Restek logo.
Other trademarks:
Conflat (Varian
Associates, Inc.)
At-a-Glance
Product
Information
fromRestek
Figure 2
The durable Silcosteel
®
-UHV layer will
withstand the sealing requirements of UHV,
maintaining knife edge integrity.
Silcosteel
®
-UHV
Dramatically Reduce Outgassing inUHVSystems
About Us
Restek's involvement in coatings began in 1987. The focus of our initial workwas to produce a
coating on stainless steel that was inert to low-level reactive organic compounds, such as explo-
sives and volatile organic compounds (VOCs). The end product
from thisworkwas the Silcosteel
®
coating for stainless steel tub-
ing. Silcosteel
®
coated tubing currently is used for construction of
analytical testing equipment by all majormanufacturers of gas
chromatography sampling and testing equipment.
Since this initial project, Restek's coatings experts have developed
a family of coatings to address other specific needs and thereby
enhance the performance of system components. In brief, these
coatings are:
•
Silcosteel
®
—A general purpose passivation layer for steel and
stainless steel.
•
Silcosteel
®
-CR
—A corrosion resistant layer that increases the
lifetime of system components in acidic environments
containing hydrochloric, nitric, or sulfuric acid. Patent pending.
•
Silcosteel
®
-UHV
—Used to reduce outgassing by components of ultra-high vacuum systems.
Patent pending.
•
Silcosteel
®
-AC
—Dramatically reduces carbon buildup on stainless steel components. Patented.
•
Siltek
™
—Provides the ultimate passivation of coated components, from glass to high nickel
alloys of steel. Patented.
•
Sulfinert
™
—A required coating onmetal componentswhen analyzing for parts-per-billion levels
of organo-sulfur compounds. Patented.
Restek coatings are now used inmany applications, spanningmultiple industries andmarket
areas. Restek coated components increase the lifetime of stackmonitoring equipment exposed to
sulfuric acid. Coated injector nozzles have longer service life because coking is inhibited.
Sulfinert
™
-coated sampling equipment increases the reliability of processmeasurements in refiner-
ies and petrochemical plants. Amass spectrometermanufacturer demands Silcosteel
®
-coated
parts to increase instrument sensitivity for analyzing pesticides. Restek coated air sampling equip-
ment is used to sample diverse environments, from city air to submarine cabins. Let us solve
your
surface activity problems. Contact Dave Smith at 800-356-1688 or 814-353-1300, x 2154, or by
email at
.
Patent pending.
Restek’s headquarters are in
Bellefonte, Pennsylvania,
USA, with distributors and
representatives in over 60
countries.
The Silcosteel
®
layer is a general
purpose passiva-
tion layer for
metals.
Siltek
™
provides
the ultimate
passivation for
many surfaces,
from glass to
high nickel alloys
of steel.
Sulfinert
™
coating
onmetal compo-
nents is required
when analyzing
for parts-per-bil-
lion levels of
organo-sulfur
compounds.
