Valves

HDL Ball Check Valves

Cast Iron Ball Check Valves are available from 11⁄2" to 24". These valves are ideally suitable for almost all sewage and waste water applications. Their low friction loss and reliable maintenance free operation contributes to a low total cost of ownership.

For special applications other ball and housing coatings or materials are available on request.

IRIS Control Valves

Robust construction designed for continuous operation, particularly suitable for various duties. Simple installation and commissioning.

Hysteresis-free and excellent regulation characteristics: are prerequisits for regulating tasks. This is achieved by the continuously variable aperture from 0 - 100%, similar to the IRIS diaphragm of a camera, always maintaining a central flow and by an enhanced segment edge design.

Non-clogging due to the free, central flow design and the automatic, self-cleaning feature of the segment edges during valve operation.

Electric actuator for precise regulation permitting up to 1200 operations per hour, S4-25% ED; optional pneumatic actuator also available.

Examples of applications: air, blowers, sewage, sludge

Energy savings and low noise due to the enhanced design.