ADV01-05_1-298

12 / 298

• 10 • 800-356-1688
Swagelok® fittings are world-renowned for meeting
demanding standards. Now, Restek is pleased to set
the new standard for inert or corrosion-resistant
tubing system components: Swagelok® products with
Restek's unparalleled surface treatments—Siltek™
or Silcosteel®-CR treatment—available from stock.
Siltek™ treatment, which is equivalent to Sulfinert®
treatment, is the ideal choice for ultimate inertness,
intended specifically for systems used to collect,
store, and transfer active compounds. The most
reactive sample components can be stored and
transferred via a Siltek™ treated system: even at
parts-per-billion levels, sulfur-containing or other
very active compounds exhibit virtually no adsorp-
tion. And, unlike coatings, Siltek™ and other Restek
treatments produce a layer that is integral with the
fitting surface—it will not chip, flake, or delaminate,
even in the most stressful applications.
Silcosteel®-CR treatment is highly effective protection
for stainless steel exposed to hydrochloric, nitric, or
sulfuric acid, or to marine environments. In inde-
pendent tests, Silcosteel®-CR treatment upgraded the
corrosion resistance of 300-grade stainless steel
samples by an order of magnitude (Table 1) and
totally protected them against crevice corrosion
(Figure 1).
Inert, High-Quality Fittings
and Tubing for
Demanding Applications
by Gary Barone, Restek Performance Coatings Division
Siltek™/Sulfinert® and Silcosteel®-CR Treated Swagelok® Fittings
✔ Siltek™/Sulfinert® treatment* ensures ultimate inertness.
✔ Silcosteel®-CR treatment enhances acid resistance tenfold, or more.
✔ Restek treatments cannot chip, flake, or delaminate.
✔ Custom treatment available.
Fitting Type Similar to Siltek ™/Sulfinert® Silcosteel®-CR
Size Swagelok® # qty. cat.# price qty. cat.# price
Union 1/16" SS-100-6 ea. 22540 ea. 22575
1/8 " SS-200-6 ea. 22541 ea. 22576
1/4 " SS-400-6 ea. 22542 ea. 22577
Tee 1/16" SS-100-3 ea. 22543 ea. 22578
1/8 " SS-200-3 ea. 22544 ea. 22579
1/4 " SS-400-3 ea. 22545 ea. 22580
Reducing Union 1 /8" to 1/16" SS-200-6-1 ea. 22546 ea. 22581
1 /4" to 1/16" SS-400-6-1 ea. 22547 ea. 22582
1/4" to 1 /8" SS-400-6-2 ea. 22548 ea. 22583
Union Elbow 1/8 " SS-200-9 ea. 22549 ea. 22584
1/4 " SS-400-9 ea. 22550 ea. 22585
Plug 1/16" SS-100-P ea. 22572 ea. 22619
1/8 " SS-200-P ea. 22573 ea. 22620
1/4 " SS-400-P ea. 22574 ea. 22597
Cross 1/8 " SS-200-4 ea. 22551 ea. 22586
1/4 " SS-400-4 ea. 22552 ea. 22587
Tube End Reducer 1/8" tube to 1/16" SS-100-R-2 ea. 22553 ea. 22588
1/4" tube to 1/16" SS-100-R-4 ea. 22554 ea. 22589
1/8" tube to 1 /4" SS-400-R-2 ea. 22555 ea. 22590
1/4" tube to 1 /8" SS-200-R-4 ea. 22556 ea. 22591
Port Connector 1/8 " SS-201-PC ea. 22557 ea. 22592
1/4 " SS-401-PC ea. 22558 ea. 22593
1/8" tube to 1 /4" SS-401-PC-2 ea. 22559 ea. 22594
Male Connector 1/8 " to 1/8" NPT SS-200-1-2 ea. 22561 ea. 22595
1/4 " to 1/4" NPT SS-400-1-4 ea. 22562 ea. 22596
1/16" to 1/8" NPT SS-100-1-2 ea. 22563 ea. 22610
1/8 " to 1/4" NPT SS-200-1-4 ea. 22564 ea. 22611
1/4 " to 1/8" NPT SS-400-1-2 ea. 22565 ea. 22612
Female Connector 1/8 " to 1/8" NPT SS-200-7-2 ea. 22566 ea. 22613
1/4 " to 1/4" NPT SS-400-7-4 ea. 22567 ea. 22614
1/4 " to 1/8" NPT SS-400-7-2 ea. 22568 ea. 22615
1/8 " to 1/4" NPT SS-200-7-4 ea. 22569 ea. 22616
Bulkhead Union 1/8 " SS-200-61 ea. 22570 ea. 22617
1/4 " SS-400-61 ea. 22571 ea. 22618
Figure 1 Silcosteel®-CR treated 316L stainless
steel coupons show no crevice corrosion and
only slight pitting corrosion (top), while bare
316L stainless steel coupons exhibit severe
crevice corrosion (bottom).
Table 1 Silcosteel®-CR treated stainless steel
coupons show little weight loss after exposure to
6% w/w ferric chloride solution.
Sample Weight Loss (g/m2 )
Silcosteel®-CR 17 19
Silcosteel®-CR 28 25
Silcosteel®-CR 47 25
Bare Steel 27 231
Bare Steel 34 209
Bare Steel 37 228
If you need to construct a system for a demanding
application, you will not find more suitable fittings
than Restek treated Swagelok® fittings. Siltek™,
Silcosteel®-CR, or other Restek surface treatments
can be applied to other fittings or parts on
request—contact our Technical Service chemists or
your Restek representative.