• 3 •
800-356-1688
Vespel
®
Ring Inlet Seal
Seals the First Time, Every Time
0.8mm IDVespel Ring Inlet Seal (washers included)
2-pk.
10-pk.
Gold-Plated
21562
21563
Silcosteel
®
21564
21565
Stainless Steel
21560
21561
1.2mm IDVespel Ring Inlet Seal (washers included)*
2-pk.
10-pk.
Gold-Plated
21568
21569
Silcosteel
®
21570
21571
Stainless Steel
21566
21567
Ordering Information
| Vespel
®
Ring Inlet Seals for Agilent 5890/6890 and 6850GCs
Gas leaks in your GC system can increase detector
noise, cause baseline instability, waste carrier gas,
and damage valuable analytical columns. Leak
checks should be a regular part of your GCmainte-
nance program. The new LeakDetective
™
II
elec-
tronic leak detector is the affordable solution for
detecting gas leaks. It will identifyminute gas leaks
that might go undetected by liquid leak detectors.*
The LeakDetective
™
II
electronic leak detector
incorporatesmicro-chip technology and a new
by Donna Lidgett, GCAccessories Product MarketingManager
ACompact, Sensitive Leak
Detector For EveryGCAnalyst
The Restek Leak Detective
™
II
✔
Fast results—responds to trace leaks in less than 2 seconds.
✔
Sensitive—detects trace leaks at 1 x 10
-4
cc/sec.; as low as 100ppm.
✔
Micro-chip design improves sensitivity and response time over previousmodels.
✔
Compact, ergonomic design is easy to hold and operatewith one hand.
✔
Battery-operated for portability (one 9 volt) instant auto-zeroing.
Description
qty.
cat.#
Leak Detective
™
II
Leak
Detector
(9 volt, Battery-Operated)
ea.
20413
Ordering Information
| Leak Detective
II
™
✔
Easy-to-use, patent-pending designmakes a better seal, easily.
✔
Prevents oxygen from damaging your columns.
✔
Reduceswear on the injection port body.
by Donna Lidgett, GCAccessories Product MarketingManager
In Agilent split/splitless injection ports, it can be dif-
ficult tomake andmaintain a good seal with a con-
ventional metal inlet disk. Themetal-to-metal seal
dictates that the analyst apply considerable torque to
the reducing nut, and, based on our testing, this
does not ensure a leak-tight seal. Over the course
of oven temperature cycling, metal seals are prone
to leaks, which ultimately can degrade the capillary
column, and cause other analytical difficulties.
Our Vespel
®
Ring Inlet Seal greatly improves injec-
tion port performance—it seals even after repeated
temperature cycles andwithout retightening the
reducing nut! This seal features a Vespel
®
ring
embedded into its face. This soft Vespel
®
ring will
not harm the critical seal on the injector body, and
is outside the sample flow path. Tests using a high
sensitivity helium leak detector indicate the Vespel
®
Ring Inlet Seal seals equally effectively at torques of
5lb. or 60lb. (Figure 1).
Why trust ametal-to-metal seal when you canmake
leak-tight seals quickly and easily—andmore reli-
ably—with the Restek Vespel
®
Ring Inlet Seal? Use
the stainless steel seal for analysis of unreactive
compounds. To reduce breakdown and adsorption
of active compounds, use the gold-plated or
design, to give you better sensitivity and faster
response time in amore compact unit. An auto-zero
feature allows you to instantly zero the leak detector
with a push of a button, and the ergonomic design
brings all the controls to your fingertips for easy use.
The unit responds in less than two seconds to trace
leaks of gases with thermal conductivities different
than air. Leaks are indicated by an audible alarm, as
well as by an LED readout. For easy, sensitive, and
reliable leak detection, order a new LeakDetective
™
II
electronic leak detector today.
*Never use liquid leak detectors on a capillary system
because liquids can be drawn into the column.
Caution:
NOT designed for determining leaks of com-
bustible gases. A combustible gas detector should be
used for determining combustible gas leaks in possibly
hazardous conditions.
new
*For dual-column installations.
Figure 1
The Vespel
®
Ring Inlet Seal achieves
leak-tight seals even at low torque, reducing
the chance of leaks.
Leak Rate (Log
10
atm cc/sec.)
0 10 20
30
40
0.01
1E-3
1E-4
1E-5
1E-6
1E-7
1E-8
1E-9
1E-10
50
60
Vespel
®
Ring Inlet Seal
stainless steel
original equipment
inlet seal
Torque (in lbs.)
Vespel
®
ring
minimizes leaks
Silcosteel
®
-treated seals. The gold surface offers
better inertness than standard stainless steel;
Silcosteel
®
treatment provides inertness similar to
that of fused silica capillary columns.
