Privately held and growing, Cornerstone Valve is an API 6A & 6D licensed corporation. We are ISO certified with manufacturing headquarters in Houston, TX USA. We specialize in trunnion mounted, floating ball, gate/globe/check, and thru conduit expanding gate valves and provide a variety of severe service valves. Our products are engineered-to-order, with domestic or hand-picked international sourcing options with quality every step of the way. With quick turnaround and competitive pricing, Cornerstone Valve would be proud to earn your business.

Cornerstone Valve manufactures API 6A & 6D valves in Houston, TX USA.

We serve the following markets: Power, Oil & Gas - Subsea to Pipeline, LNG/Cryogenic, Mining, Refining, Chemical & Petrochemical markets with engineered valves for high pressure and high temperature and more.

We have a global presence, innovative in-house engineering and a large machine shop.

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.