ms-NoVent
TM
Replacement Parts
A56
Scientific Instrument Services, Inc.
TM
Phone: 908-788-5550
www.sisweb.com/catalog/08/A56
5 minute GC/MS Column Changeover
-
Change GC columns without venting the MS
-
Isolates MS while the GC column is being changed
-
Prevents air from entering the MS by using an
innovative helium purge system
-
Restricts gas flow into the MS using a restricted
transfer line specific to the MS pumping system
-
Improves MS productivity
-
Reduce MS downtime
-
Available for Agilent,Varian and Shimadzu systems
T
he ms-NoVent allows a capillary column to be changed without venting the MS and the mass spectrometer can be
operational almost immediately. The ms-NoVent prevents air and water from entering the MS during column change-over. The
key to the ms-NoVent is the unique Flow Director Orifice and deactivated fused silica interface tube, which are located at the
MS inter face as part of the ms-NoVent Tee.
Before the column is removed from the interface, a helium purge is turned on. The fused silica restrictor/interface tube limits the flow
of helium into the mass spectrometer. As shown in
Figure 1
, after the column has been removed from the ms-NoVent Tee, the Flow
Director Orifice prevents air from entering the mass spectrometer. Thus, the flow of helium through the orifice acts as a dynamic seal
preventing air being sucked back into the MS.
Normal Operation Mode
In normal operation mode the Helium purge is turned
off. The column flow is directed through to the MS via the
fused silica transfer tube. (See
Figure 2
)
Column Change Mode
In the column change mode a Helium purge is applied
to the Interface Tee. the column can then be disconnected
without shutting down or `venting' the MS. The existing col-
umn, or a new column, can then be connected and the ms-
NoVent switched back to normal mode for standard opera-
tion. (See
Figure 3
)
ms NoVent Replacement Parts*
Flow Director Orifice
(dynamic seal)
Fused Silica
Restrictor/Interface Tube
into the MS Vacuum System
Glass Lined Tubing
Helium Purge
Purge Off
Column
MS
To MS
To Atmosphere
Figure 1 - The interface
tee is the heart of
the ms-NoVent
Figure 2 - Normal Operation Mode
Purge On
Helium Flow
Column
MS
Figure 3 - Column Change Mode
Ms- NoVentTM MS Restrictors and Adaptor
Part No.
Description
Pack Size
Agilent Technologies - Adaptor not required
Agilent 5970
2 Restrictors
Agilent 5971/5972
2 Restrictors
Agilent 5973
2 Restrictors
Agilent GCD
2 Restrictors
Agilent 5988A
2 Restrictors
Agilent 5989
2 Restrictors
Perkin Elmer
Turbomass/Gold
2 Restrictors
Shimadzu
MS 5000/5050
(Standard Interface)
2 Restrictors
MS 5000/5050
(WIF - wide borer interface)
2 Restrictors
Thermo
Thermo GCQ
2 Restrictors & 1 Adaptor
Thermo GCQ
2 Restrictors
Thermo SSQ7000
2 Restrictors & 1 Adaptor
Thermo SSQ7000
2 Restrictors
Thermo Voyager
2 Restrictors & 1 Adaptor
Thermo Voyager
2 Restrictors
Varian
Varian Saturn 2000
2 Restrictors & 1 Adaptor
Varian Saturn 2000
2 Restrictors
Varian Saturn 1,2 & 3
2 Restrictors & 1 Adaptor
Varian Saturn 1,2 & 3
2 Restrictors
Replacement Parts
Stainless Steel Tubing
(with rest.)
1 meter (1/16" O.D.)
SilTite
TM
Ferrules
(0.1 - 0.25mm I,D. columns)
10 Ferrules & 2 Nuts
SilTite
TM
Ferrules
(0.32 I.D. columns)
10 Ferrules & 2 Nuts
SilTite
TM
Ferrules (1/16" hole)
10 Ferrules & 2 Nuts
*Instrument specific restrictor (and adaptor if applicable) is not included and must
be ordered separately)
*See Page D8 for MS NoVent II System
tip...
