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Stainless Steel Bell Jars
Stainless steel bell jars are
designed for use with baseplates, base wells
and feedthrough collars. A dovetail groove in the
jar's base flange holds a Viton® elastomer gasket, which makes the vacuum seal with one
of the aforementioned components. All stainless steel bell jars are fitted
with a four inch view diameter Pyrex® viewport.
All vacuum welds are internal and provide UHV compatibility. For added
convenience, all bell jars are fitted with a hoist or lift-ring that is
welded to the chamber's domed top. These chambers can be purchased with an
optional electropolished finish.
Feedthrough
Collars
feedthrough
collars are used to expand the capabilities of conventional bell jars by
providing radially oriented access ports. Four,
eight, or eighteen ports fitted with either 2-3/4 inch Del-Seal™ CF
metal seal flanges or ISO KF NW40 Kwik-Flange™
flanges are available. These ports accept a variety of standard vacuum
components such as electrical, fluid and motion feedthroughs.
Installation of a feedthrough collar also
requires the use of an baseplate. The feedthrough collar is positioned between a bell jar and
the baseplate. The feedthrough
collar / baseplate seal is made with either an
L-gasket or circular cross section elastomer,
depending on which collar model is used. The feedthrough
collar seal is made with an L-gasket elastomer.
Stainless steel bell jars would use a circular cross section elastomer in the jar's dovetail groove to make this
seal.
Baseplates
Base plates are required
for installation of both bell jars and feedthrough
collars. They provide a flat and stable platform upon which bell jar
systems can be built. Baseplates are typically
mounted atop a vacuum pump or the gate valve fitted to the pump. offers
three baseplate interface flanges for mating with
standard pumps or gate valves. Interface flanges include ANSI ASA elastomer seal flanges, Del-Seal™ CF metal seal
flanges and bolt style Large-Flange™ ISO LF elastomer
seal flanges. Baseplates are available with baseplate flange diameters suitable for 12, 18 and 24
inch chamber body diameters.
Base Wells
Base wells
are the product of integrating both a baseplate
and a feedthrough collar. They provide the
functionality of both components and replace one vacuum seal with a weld
joint. They are available with radially oriented
access ports in four, eight, or eighteen port configurations and are fitted
with either 2-3/4 inch Del-Seal™ CF metal seal flanges or ISO KF NW40 Kwik-Flange™ flanges. These ports accept a
variety of standard vacuum components such as electrical, fluid and motion feedthroughs. Both baseplates
and base wells connect to the vacuum pumping system with a choice of
standard smooth face ASA ANSI flanges, optional Del-Seal™ CF metal
seal flanges or ISO LF bolt-style Large-Flange™ flanges. Gasket seals
for any flange or port are not included with baseplates
or base wells and must be purchased separately. For pump port or access
port flange hardware, refer to individual flange specifications in the
Flanges & Fittings section.
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