MDC Vacuum Products, LLC consists of three unique product divisions which include MDC Vacuum Products, Insulator Seal Inc. (ISI™), and MDC Gas Delivery Products. We also have a European division known as MDC Vacuum Limited. The MDC Vacuum Products division website is our eCommerce website where you can place orders online for products from all of our company’s divisions. The eCommerce website will display the appropriate catalog parts (US or Europe) available to you based off of your location, or you can change the catalog displayed by selecting a different region from the drop down menu located in the upper right of the website’s header.


The MDC Vacuum Products division is located at our company’s US headquarters in Hayward, CA and was formed in order to serve a rapidly expanding vacuum industry and to satisfy the increasing demand for high quality vacuum components with fast delivery and reasonable prices throughout the world. MDC established its standing in the vacuum components industry after becoming the first licensed manufacturers of Varian’s patented Conflat® metal-seal flange, known today to most MDC customers as the Del-Seal™ CF metal-seal flange. Reputation for quality, continuous process improvement, innovation and reliability have made MDC a coveted provider of vacuum instruments and components the world over.



Insulator Seal Inc. (ISI™), a division of MDC Vacuum Products, LLC, is located in Sarasota, FL and manufactures electrical & optical ceramic-to-metal sealed components for harsh environments. ISI has been the innovation leader in the industry for over 30 years. Evolving from being a high vacuum solutions provider only, ISI now delivers world-class components for harsh environmental connector applications around the globe.



MDC Gas Delivery Products specializes in the design and manufacture of ultra-high purity gas delivery lines, panels, components, complex systems, as well as UHP weldments and full gas panels and boxes. Capabilities include clean room welding of gas lines, vacuum weldments and tube bending. We offer engineering, manufacturing, and system integration solutions to the Solar, LED, Aerospace, Clean Technology, Medical Device and Semiconductor industries.