Quality features
- The guide on both sides ensures high plunger stability in all positions, thereby preventing natural oscillations and noise problems.
- The plunger's geometric design provides for almost constant pressure loss over wide flow rate ranges while significantly reducing the level of inherent noise.
- Integral flushing openings protect the bypass valve from contamination of the guide area.
- HDS valves are designed to be robust and compact. They are made from standard POM material and are approved for use in drinking water applications in accordance with KTW and WRAS standards.
- Difference to › check valves (backflow preventers): In HDS valves, the plunger opens dynamically with the increased water pressure and keeps the pressure loss at a constant level across wide flow rate ranges. Reliable leakage-free backflow prevention is not required here, so HDS valves have no seal between plunger and housing. In contrast, a check valve reliably prevents backflow and keeps the pressure loss low.
