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VCR® Tube fittings are designed for rapid make-up in tube, pipe and welded systems.
They are zero clearance fittings, ideal for installation in limited space. Sealing is
accomplished with the compression of a removable copper metal gasket.
This type of fitting is ideally suited for gas admission into UHV systems.
Swagelok® compression fittings are an economical alternative to the VCR® fitting.
They do not require gaskets and seal by swaging the stainless steel tube to which
they are mated.
The MDC fluid feedthrough product line is divided into two main categories, general
service and cryogenic service. General service fluid feedthroughs are .035 inch
single wall tube construction and designed for the transmission of water as a cooling
Watercooled fluid feedthroughs are an economical and reliable method of introducing water into a vacuum system.
They are available with either style of tube fitting as described above. Cryogenic service
fluid feedthroughs are designed for transmission of liquid nitrogen as the cooling
medium. Because of the extreme thermal gradients encountered with liquid nitrogen,
these feedthroughs are constructed with dual and coaxial tube geometries. The coaxial cavity
between these tubes is on the vacuum side of the feedthrough assembly and provides a thermal
barrier that reduces condensation and ice buildup on the atmosphere side of the assembly. Ice buildup
at the mounting flange interface would be detrimental to flange mount seal integrity
especially in the case of elastomer seal types.
Three vacuum mount styles are available for all versions of fluid feedthroughs including
Del-Seal™ CF metal seal flanges, Kwik-Flange™ ISO KF elastomer gasket seal flanges and 1" bolt baseplate
mounts with elastomer gasket seals.
Del-Seal™ CF metal seal flanges employ a Conflat® compatible knife-edge sealing
mechanism that produces a cold-flow deformation of a metal copper gasket. They are ideally suited for use in
ultrahigh vacuum environments to 1x10-13 Torr and 450°C bakeout.
Kwik-Flange™ ISO KF flanges are ideal for vacuum environments requiring frequent
assembly and disassembly. Fastening and sealing is achieved by a hinged radial clamp,
which provides compression of an elastomer gasket. Kwik-Flange™ mounts comply with
all ISO specifications for vacuum mount hardware. This style of mount is suitable for
high vacuum service to 1x10-8 Torr and 150°C bakeout.
The baseplate bolt mount is a self contained
vacuum mount that includes everything
necessary for installation and sealing. The
only requirement is that the chamber or
baseplate wall must have a 1 inch clearance
bore with a flat and smooth 1-3/4 inch
diameter spot face for elastomer sealing.
MDC Vacuum Products,
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