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.
HDL Ball Check Valves
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.