• Chemical & Petrochemical

    Lethal Media. Viscous sludge. Corrosive media. Toxic emissions. A rugged industry that demands absolute reliability,
    repeatability and safety. Our metal seated ball valves for severe service should be your first choice.


  • Oil & Gas

    Subsea to Pipeline
    In oil & gas production
    high cycles, high temperatures, heavy solids
    and high pressure are eveyday extreme conditions for valves in this field.

  • Refining

    Refining is a hot, dangerous industry.
    Attention to detail is paramount.

  • LNG/ Cryogenic

    Cornerstone Valve has solutions for your most extreme LNG/Cryogenic challenges:

  • Mining

    Mining, an industry faced with constant abrasion, corrosion, and erosion issues. The result: valves are decimated on a weekly basis. Business efficiency demands valves that can outlast the rugged conditions. Cornerstone has metal seated ball valves for these and other severe applications.

  • Power Generation

    A monumental operation.
    Leaky valves equate to loss of energy and loss of money. Replacing a valve is most often more costly than the valve itself.

Cornerstone 2013

To learn more about Cornerstone, please watch our Corporate Introduction to the left.

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Welcome to Cornerstone Valve

Thank you for coming by. Cornerstone Valve is a USA manufacturer of API 6A & 6D valves headquartered in Stafford, TX. We are privately held and ISO certified. With our in-house engineering and machine shop we are positioned to provide fast delivery on your extreme valve needs, including metal seated ball valves.  Since 1990 Cornerstone Valve has provided global leaders with flow control solutions in high pressure and high temperature applications. We welcome the opportunity to earn your business with competitive pricing and exceptional customer service.