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Del Seal CF to Kwik-Flange KF

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30962 Santana Street
Hayward, California
United States

Phone : 510-265-3500
Fax     : 510-887-0626
Email :



About MDC


MDC Vacuum Products, LLC welcomes you to watch our new company overview video. We are very excited to be able to share this with you, and hope it helps you obtain a better understanding of our company, what we can do for you, and our plans for the future. This video will take you on a tour of each of our product divisions around the world including our corporate headquarters and vacuum products division in Hayward, California, our Insulator Seal (ISI) division in Sarasota, Florida, our Gas Delivery Products division in San Jose, California, and our MDC Europe division (MDC Vacuum Ltd) in Milton Keynes, United Kingdom.

MDC is a world leader in Vacuum and Ceramic Seal Solutions. MDC was founded in 1975 to serve a rapidly expanding vacuum industry and to satisfy the increasing demand for high quality vacuum components with fast delivery and reasonable prices. Over the years MDC has expanded its portfolio acquiring Insulator Seal (ISI), a ceramic to metal bonding company, Innovent Technologies, a gas and vacuum weldment company. Today MDC is a leading manufacturer engineered process solutions; in HV & UHV Vacuum, ceramic-to-metal bonding and gas delivery.

Products include flanges, fittings, valves, roughing hardware, vacuum measurement and motion and manipulation instruments, a standard line of vacuum chambers, ceramic-to-metal Feedthroughs, Optics as well as Bubblers, analytical carts and Gas Delivery solutions.

  • MDC’s Vacuum Products business (VP) builds and stocks off-the-shelf vacuum components and can build custom solutions per our customers’ request.
  • Insulator Seal (ISI™), manufactures Electrical & Optical Ceramic-to-Metal vacuum components. The 26,000 sq ft manufacturing facility, which includes a class 1000 clean room is located in Sarasota, FL. Our ceramic Seals business has achieved a global reputation for its high quality manufacturing and has thousands of our standard electrical and optical vacuum components in stock and ready to ship. Products available include from the ISI™ complete line of electrical feedthroughs, thermocouple feedthroughs, as well as single and double ended multipin instrumentation feedthroughs. We also manufacture high frequency RF power feedthroughs and in addition electrical breaks viewports and custom engineered products for exotic or demanding applications.
  • MDC’s Gas Delivery Products business unit (formerly MDC SemiSystems) specializes in the design and manufacture of ultra-high purity gas delivery lines, pallets, components, and complex systems. The 15,000 sq. ft manufacturing area is located in San Jose and includes a 1,700 sq. ft. Class 100 clean room for ultra high purity welding and assembly. Also an additional 1,800 sq ft class 10,000 area for assemblies and TIG welding. The operation includes a full line of CNC and manual tube bending capabilities, along with an integral machine shop for quick turn capabilities. The capabilities include clean room welding of gas lines, vacuum weldments, tube bending. We offer engineering, manufacturing, and system integration solutions to the Aerospace, Clean Technology, Medical Device and Semiconductor industries.
  • MDC’s Europe business serves as the local sales and distribution office for our many customers in Europe.  MDC-Europe stocks parts, provides fast delivery of products, and enables custom design consultation to Europe, Africa, and the Middle East.
MDC provides engineered solutions for a variety of industries and vacuum applications:
  • Aerospace       
  • Bio & Pharmaceutical
  • Clean Technology
  • Defense
  • General Industrial
  • Government
  • Medical Devices
  • National Labs
  • Oil & Gas
  • Research & Development
  • Semiconductor
  • LED
  • Solar
  • Nuclear

MDC Manufacturing Overview
The MDC product line has evolved against a backdrop of careful research and development as well as the implementation of the latest in automated manufacturing techniques. Multiple axis Mazak® CNC machining centers are at the heart of all metal machining operations at the Hayward, California facility. These sophisticated, robotically controlled machines are designed for continuous operation producing finished components from raw stainless steel. Engineering and design are routinely implemented using 3D Modeling/Solid-Works and Finite Element Analysis (FEA) computer work
stations networked with one central system which is accessible to all production facilities. The main manufacturing facility, located in Hayward California, contains 107,000 square feet of manufacturing space.

Insulator Seal is comprised of high and ultrahigh vacuum feedthroughs and optical viewports. Custom capabilities include the ability to produce component designs up to a Max Diameter of 11 inches (279mm) - Max Length of 4 feet (1.3m). Our Sarasota, Florida production facility has 26,000 square feet of manufacturing space and has multiple furnaces capable of brazing over 1000°C.

MDC’s Gas Delivery Products are produced at our San Jose, California facility which has 15,000 square feet of manufacturing area, with a 1,700 square foot Class 100 clean room for ultra high purity welding and assembly, an 1,800 square foot Class 10,000 area for assemblies and manual TIG welding, CNC and manual tube bending, and a machine shop.

Inventory and Basic Catalog Components
MDC maintains substantial inventory levels of its basic catalog components so it can respond quickly to urgent customer needs and requirements. Within the continental US, every effort is made to ship stock components the day after an order is received. In the event that an item is not in stock, or if the component is required with a special size, type or quantity, a firm delivery date will be established and quoted by the MDC technical sales engineers.

Worldwide Network of Distributors and Representatives
MDC has assembled a worldwide network of distributors and representatives forming an experienced staff of vacuum scientists, engineers and technicians which provide the support and communication channels necessary for a solid and long-term business partnership. This network was constructed by recruiting prominent and reputable sales organizations from around the world which share MDC’s commitment to quality and service. In the United States and Canada, sales representation is divided into smaller state and provincial territories. In the Pacific Rim market, MDC has representatives in Australia, China, Japan, Korea, Malaysia, Singapore, Taiwan and Thailand. Representation for all of the European continent is provided through the MDC Europe sales offices in the United Kingdom, France, Germany and Italy. In the Middle East, representation is available in Israel. For a current, detailed listing of all MDC sales representatives, complete with names, addresses, telephone and fax numbers, go to Find Sales Rep.

MDC is committed to producing quality products that set the industry standard. In keeping with this commitment MDC has successfully completed its registration to the ISO 9001:2008 standard. For more information on ISO please go to About ISO.

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