MDC Vacuum Limited

+44(0)1825 280 450

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About MDC

MDC Vacuum Limited

MDC maintains substantial inventory levels of its basic catalogue components so it can respond quickly to urgent customer needs and requirements. As soon as 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.

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 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 facilities, 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.