MDC O-Ring Sealed Feedthrough Collars are designed to expand the functionality of conventional bell jars by providing radially oriented access ports. Available with four, eight, or eighteen ports, these collars come fitted with either 2-3/4 inch (69.85 mm) Conflat CF metal seal flanges or ISO KF NW40 Kwik-Flange™ flanges.

The access ports support a wide range of standard MDC vacuum components, including electrical, fluid, and motion feedthroughs, offering flexibility for diverse vacuum system requirements.

Installation requires an MDC baseplate, with the collar positioned between the bell jar and baseplate. The feedthrough collar/baseplate seal is achieved using a circular cross-section O-ring elastomer, providing a reliable vacuum seal. For stainless steel bell jars, a circular cross-section elastomer is applied within the jar’s dovetail groove to complete the seal.

Industry Applications

O-Ring Sealed Feedthrough Collars are widely used in semiconductor processing, thin film deposition, vacuum coating, surface analysis, materials research, and advanced laboratories. By providing multiple access points and secure sealing, these collars enable integration of complex vacuum instrumentation, feedthroughs, and support systems. Their reliable elastomer sealing ensures vacuum integrity, making them ideal for both research-focused and industrial-scale vacuum environments.