HDL Products


Since 1913, Hillen de Lelie has produced a large number of machines for industrial applications whereby 'innovation' has always been the central point of focus. A process which resulted in the company making a revolutionary discovery in 1935: The Ball Check Valve. This invention has resulted in an enormous improvement of water-treatment installations both at home and abroad. The Ball Check Valve is a product with an unprecedented number of possible applications in all industrial and government-owned (waste) water systems.

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Ball Check Valves

HDL Ball check valves with unrestricted passage, resilient seated, low-resistance ball operation. A wide range of applications in waste water systems and potable water lines.