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Vespel® Ring Inlet Seal
Seals the First Time, Every Time
0.8mm ID Vespel® Ring Inlet Seal (washers included) 2-pk. 10-pk.
Gold-Plated 21562 21563
Silcosteel® 21564 21565
Stainless Steel 21560 21561
1.2mm ID Vespel® 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 6850 GCs
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 GC mainte-
nance program. The new Leak Detective ™ II elec-
tronic leak detector is the sensitive, affordable solu-
tion for detecting gas leaks.*
Microchip technology and a new design give you bet-
ter sensitivity and faster response time in a more
compact unit. You can instantly zero the leak detector
by Donna Lidgett, GC Accessories Product Marketing Manager
A Compact, Sensitive Leak
Detector For Every GC Analyst
The Restek Leak Detective™ II
✔ Fast results—responds to trace leaks in less than 2 seconds.
✔ Sensitive—detects trace leaks at 1 x 10-4cc/sec.; as low as 100ppm.
✔ Microchip design improves sensitivity and response time over previous models.
✔ Compact, ergonomic design is easy to hold and operate with one hand.
✔ Battery-operated for portability (one 9 volt); instant auto-zeroing.
Description qty. cat.# price
Leak Detective™ II Leak
Detector ea. 20413
Ordering Information | Leak Detective II™
✔ Easy-to-use, patent-pending design makes a better seal, easily.
✔ Prevents oxygen from damaging your columns.
✔ Reduces wear on the injection port body.
by Donna Lidgett, GC Accessories Product Marketing Manager
In Agilent split/splitless injection ports, it can be dif-
ficult to make and maintain a good seal with a con-
ventional metal inlet disk. The metal-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 stays sealed even after
repeated temperature cycles, without 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
from 5 in. lb. to 60 in. lb. (Figure 1).
Why trust a metal-to-metal seal when you can make
leak-tight seals quickly and easily—and more 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
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 dif-
ferent than air: detect helium, hydrogen, or nitro-
gen at 1x10-4cc/sec or at an absolute concentration
as low as 100ppm. Leaks are indicated by an audi-
ble alarm, as well as by an LED readout. For easy,
sensitive, and reliable leak detection, order a new
Leak Detective™ 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.
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.
Figure 1
The Vespel ® Ring Inlet Seal achieves
leak-tight seals even at low torque, reducing
the chance of leak-related problems.