The HDS (hydrodynamic switch) valve is a dynamic overflow valve. By maintaining a defined differential pressure, it ensures constant pressure ratios in special components of boilers and sensor faucets.
By keeping the pressure loss at a constant level over a certain flow rate range, HDS valves ensure smooth turbine operation for power generation.
HDS valves limit the delivery pressure of DHW circulation pumps and ensure a minimum flow rate in the boiler circuit. They also avoid annoying flow noise caused by excessive differential pressure.
HDS bypass valves open as soon as the water pressure reaches a level defined by means of the force of the installed spring.
The more water flows, the wider the valve opens. The excess water is diverted past the main pipe with the device (pump or turbine), where the pressure and flow rate remain constant.
HDS bypass valves are installed in the flow direction.
Please note that bypass valves are only available for our OEM / manufacturing customers. For more details, as well as information on worldwide approvals, please see the product listing. To refine your selection, please use the following points as filters.
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All relevant technical data on NEOPERL HDS bypass valves is available for download here. Other models are available upon request.
Please contact us for help finding the right bypass valve. Neoperl offers you solutions that are completely tailored to your requirements. Our qualified staff will be happy to assist you with any questions you may have.