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The MDC Large-Flange™ ISO LF family of modular building-block components includes
all of the commonly used standard hardware and fittings. Virtually all standard MDC
feedthroughs and accessories are available for use with Large-Flange™ ISO LF flanges.
Reducer flanges are available to connect different size ISO components. This section
includes ISO KF and ISO LF reducer flanges for KF to KF, KF to LF and LF to LF flange
Large-Flange™ ISO LF flange combinations. Hybrid adapters are available
to connect ISO LF components to non ISO vacuum fittings and mounts. Some of these
include Del-Seal™ CF metal seal flanges, ANSI ASA flanges, Swagelok® compression
tube fittings and VCR® metal gasket tube fittings and national pipe thread fittings. For
more details and information on hybrid adapters please reference Section 1.5 in this
catalog.
MDC Large-Flange™ ISO LF flanges are available in nine standard maximum tube
sizes including 2-1/2", 3", 4", 6", 8", 10", 12-3/4", 16" and 20" diameters. Each of
these basic flanges are also offered in blanked formats which are suitable for
custom modification or to blank-off unused chamber ports. Typically, U.S. tube sizes are
specified in inches and identified by their outside diameters. MDC standard ISO LF
flange size designations are as follows...
L250 for 2.50", L300 for 3.00", L400 for 4.00", L600 for 6.00", L800 for 8.00",
L1000 for 10.0", L1200 for 12.75", L1600 for 16.0" and L2000 for 20.0" tube
diameters.
In general, MDC components compare with international components using an
inch-to millimeter ratio. U.S. sizes refer to a tube’s outside diameter, whereas international sizes
refer to a tube’s inside diameter. The chart on the right side gives a quick
comparison between inch and metric ISO flange sizes.
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