KKL is a flap valve designed for installation on flat walls. It is used in low-pressure channels to prevent backflow and flooding, and can be installed both above and below the water surface.The flap is angled at 15° and mounted in a robust, maintenance-free rubber hinge with embedded fabric. The design provides low hydraulic resistance in the flow direction, while a soft seal between the valve and frame, as well as a wall seal, ensures reliable closure.A vertical steel reinforcement is mounted on the smooth PEHD flap to prevent buildup from surface and wastewater.KKL is made of corrosion-resistant materials, has no mechanical parts, and requires minimal maintenance.It opens easily in the direction of flow and seals securely against backflow.Applications: Low-pressure channels, protection against backflow and flooding.Operation: Automatic flap in rubber hinge. Technical specification: /* Container for specs + image */ .tech-container { display: flex; gap: 20px; align-items: flex-start; } /* Specification table column */ .tech-spec-col { width: 40%; } /* Image column */ .tech-image-col { width: 60%; text-align: center; } .tech-image-col img { max-width: 100%; height: auto; display: block; margin: 0 auto; } /* Mobile: stack table and image */ @media (max-width: 768px) { .tech-container { flex-direction: column; } .tech-spec-col, .tech-image-col { width: 100%; } .tech-image-col { margin-top: 12px; } } Name: KKL Flap Gate 500x500 Opening Pressure: 63 mmHO Thickness Flange: 35mm Weight: 71kg # Bolt holes (#B): 8- Dimension (D): 500mm Height (H): 720mm Height center opening (H2): 360mm Length closed (L): 340mm Length Open (L2): 710mm Width (W): 800mm Horizontal c-c (hcc): 150mm Vertical c-c (vcc): 150mm Ø Bolt Holes (ØB): 16mm