Stainless Steel Bell Jars
MDC 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 MDC vacuum components such as electrical, fluid and motion feedthroughs. Installation of a feedthrough collar also requires the use of an MDC 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.
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 MDC 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 of this catalog.
Insulator Seal (ISI) brand catalog and custom engineered ceramic to metal seal products are manufactured to ISO 9001:2008 standard utilizing our qualified hermetic brazing and joining processes.