Larner-Johnson® Flow Control Valve
Trusted for over a century, Larner-Johnson® valves deliver smooth and accurate flow control in the world’s most iconic reservoir and dam systems.
At Blackhall Engineering, we do more than manufacture water valves — we engineer peace of mind. With a heritage dating back to 1828 and an unrivalled track record in British valve innovation, we’ve become the trusted partner to the world’s most critical water infrastructure projects.
From the largest dams in the UK to international megaprojects like New York’s Ashokan Reservoir and Texas’s Integrated Pipeline, our name is synonymous with enduring performance, sustainability, and engineering excellence.
Pioneers of the 100 Year Valve®, Blackhall is redefining valve longevity for the water industry. Designed, engineered, and manufactured in the UK, our valves offer unparalleled durability and lifecycle value — backed by decades of field data and a commitment to whole-life performance.
Whether it’s a DN600 Fixed Cone Valve, a DN1800 Gate Valve, or a bespoke Larner-Johnson® flow control solution, every Blackhall product is the result of rigorous testing, advanced FEA and CFD analysis, and deep domain expertise.
Our water valves are at the heart of critical infrastructure — dams, reservoirs, hydropower schemes, and raw and treated water networks — trusted in cities from London to Riyadh, Montreal to Sydney. And behind every valve stands a team of Valvologists® — highly skilled engineers who blend precision manufacturing with personalised service to deliver unmatched value to our customers.
But Blackhall is not only about longevity. We are proud leaders in sustainable engineering, helping water utilities meet their carbon and TOTEX goals. Through our Renov8® programme, we have demonstrated that UK-based valve refurbishment can cut carbon emissions by up to 87.5% compared to importing replacements — proof that environmental responsibility and economic sense can go hand-in-hand.
In a sector undergoing transformative change — with over £96 billion earmarked for water infrastructure upgrades by 2030 — Blackhall stands ready to support clients with world-class products, proactive service, and professional training via our valveacademy®, accredited by the EUSR.
“When performance matters for the next 100 years, trust the team that builds valves for life.”
Discover our flagship water infrastructure valves—proven in performance, engineered for legacy, and built to last.
Blackhall Engineering was honoured to be spotlighted in the UK Government’s “Engineering is GREAT” campaign — a global initiative celebrating the very best of British engineering talent.
This prestigious endorsement isn’t just a logo—it’s a testament to the world-class expertise, reliability, and innovation that defines Blackhall. Our inclusion alongside Britain’s most iconic engineering names affirms our role as a leading force in high-integrity valve solutions—trusted by global infrastructure developers, energy operators, and water authorities.
Whether you're upgrading legacy infrastructure or delivering a new megaproject,
Blackhall is ready to support you with proven performance and trusted expertise.
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