Simple check valve device without housing, low hydraulic resistance in the flow direction. Perfect seal during backwater due to high surface pressure of the soft rubber flap on the narrow rim of the stainless steel outlet.
This simple back-pressure valve consists of a duck-bill shaped rubber sleeve without a housing. Medium hydraulic resistance in flow direction and a very tight seal against back pressure. Especially suitable for turbulent currents and high back-pressure.
Flood protection device without a housing, with a very low resistance in the flow direction. Perfect seal during backwater due to high surface pressure of the soft rubber flap on the narrow rim of the stainless steel outlet.
Rigid, robust rectangular flood protection device with cambered gate membrane and reinforcing frames, space-saving construction. For openings of medium size and high backpressure heads.
Rigid, rectangular flap valve with a trapezoid cross-section. A backflow prevention device particularly for overflow weirs at CSOs where high backpressure and large flows are expected.
Check valve with cone-shaped rubber membrane inside a thin-walled pipe section. Very low head loss in flow-direction provides a tight seal in reverse flow direction. Particularly suitable for installation in pipelines.
