Cornerstone Valve CV is a USA manufacturer headquartered in Stafford TX. With our streamlined engineering and manufacturing process we are positioned to provide custom engineered valve solutions for your application usually with a shorter delivery than our competitors. CV produces soft and metal seated ball valves from ANSI 150 to API 10K ANSI 4500 and metal seated ball valves to API 20K . Since 1990 Cornerstone Valve has provided global leaders with flow control solutions in high pressure erosive slurry and high low temperature applications. Providing valves to the oil and gas industry chemical and refining industry sub sea power nuclear and many other industries our clients require quick turn around. Our conservative robust valve configurations and exacting engineering and manufacturing methods will provide you with the safest most reliable valves on the market.