Proudly American, Cornerstone Valve has been at the forefront of American Manufacturing for over 30 years.

Born as innovators, we spearheaded the early commercialization of custom engineered valves tailored for the most demanding service applications. Today, our reputation as a leading manufacturer of these specialized ball valves is unrivaled.

Every product we craft embodies the spirit of American ingenuity and quality. Our entire operation – from design to assembly – unfolds under one roof in the heart of Houston, Texas, the place we’ve proudly called home since 1990. Most of our suppliers hail from within the USA, many from Texas, ensuring a robust and responsive supply chain. This, in turn, guarantees our industry-leading turnaround times for made-to-order products and enables our 24×7 after-market support.

Our unwavering commitment to excellence is further underscored by our adherence to ISO 9001 quality management system standards since 1997, a testament to the high-quality craftsmanship you can expect from every Cornerstone Valve product.

When you choose Cornerstone Valve, you’re not just purchasing a valve; you’re buying into a legacy of American manufacturing excellence, supported by a tradition of innovation and a dedication to quality unmatched in the industry.