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For 50 years GNB has been known for its ability to successfully engineer and manufacture vacuum products for the most difficult of applications. GNB is the market leader for:

  • Large sized gate valves

  • High temperature gate valves 

  • Valves for highly contaminated environments

  • Valve customization 


GNB's 70,000 sqft facility in Elk Grove, CA is ISO 9000 certified and houses three large CNC mills, two smaller mills, a large CNC 5-axis waterjet, several new leak test stations, and many weld stations. 

Today we specialize in vacuum valves, vacuum chambers and vacuum hardware accessories. The two qualities that set GNB apart from our competition are our ability to make large products (if you can find a way to transport it, we have the equipment to build it) and our experience of successfully engineering products for the most difficult applications.

Products Include:

  • Gate Valves

  • Stainless steel, mild steel, and aluminum chambers

  • UHV chambers

  • Angle valves, ball valves, and slit valves

  • Flanges and fittings

  • Viewports

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