{"product_id":"kkl_500x500","title":"KKL_500x500","description":"\u003cp\u003e\u003cspan\u003eKKL is a flap valve designed for installation on flat walls. \u003c\/span\u003e\u003cspan\u003eIt is used in low-pressure channels to prevent backflow and flooding, and can be installed both above and below the water surface.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eThe flap is angled at 15° and mounted in a robust, maintenance-free rubber hinge with embedded fabric. \u003c\/span\u003e\u003cspan\u003eThe 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.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eA vertical steel reinforcement is mounted on the smooth PEHD flap to prevent buildup from surface and wastewater.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eKKL is made of corrosion-resistant materials, has no mechanical parts, and requires minimal maintenance.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eIt opens easily in the direction of flow and seals securely against backflow.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eApplications: Low-pressure channels, protection against backflow and flooding.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eOperation: Automatic flap in rubber hinge.\u003c\/span\u003e\u003c\/p\u003e\n\u003c!-- ns-spec:start --\u003e\u003cdiv class=\"ns-spec\" style=\"margin-top:28px;border-top:1px solid #e6e9ee;padding-top:22px\"\u003e\n\u003ch3 style=\"font-size:20px;color:#0d1b2a;margin:0 0 14px\"\u003eTechnical specification\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;font-size:14.5px;line-height:1.5\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eOpening Pressure\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e63 mm H₂O (2.5 inh2o)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eThickness Flange\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e35 mm (1.4 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e71 kg (156.5 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003e# Bolt holes (#B)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eDimension\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e500 mm (19.7 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eHeight\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e720 mm (28.3 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eHeight center opening (H2)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e360 mm (14.2 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eLength closed\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e340 mm (13.4 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eLength Open (L2)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e710 mm (28 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eWidth\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e800 mm (31.5 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eHorizontal c-c (hcc)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e150 mm (5.9 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eVertical c-c (vcc)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e150 mm (5.9 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eØ Bolt Holes (ØB)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e16 mm (0.6 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e-25° C - +40° C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eWatertightness\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eDIN 19569-4 table no. 1 Class 5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"margin-top:20px;display:flex;flex-wrap:wrap;gap:10px\"\u003e\n\u003ca href=\"https:\/\/files.wapro.io\/flap_gate\/tech-spec_kkl_en-gb.pdf\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border:1.5px solid #019ee3;border-radius:8px;color:#019ee3;font-weight:600;text-decoration:none;font-size:14px\"\u003e↓ Product sheet (PDF)\u003c\/a\u003e\u003ca href=\"https:\/\/files.wapro.io\/flap_gate\/kkl_500x500\/tech-spec_kkl_500x500_en-gb.pdf\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border:1.5px solid #019ee3;border-radius:8px;color:#019ee3;font-weight:600;text-decoration:none;font-size:14px\"\u003e↓ Technical specification (PDF)\u003c\/a\u003e\u003ca href=\"https:\/\/files.wapro.io\/waflap_kkl\/kkl_500x500\/fig\/kkl_500x500_en.svg\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border:1.5px solid #019ee3;border-radius:8px;color:#019ee3;font-weight:600;text-decoration:none;font-size:14px\"\u003e↓ Dimensional drawing (PDF)\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c!-- ns-spec:end --\u003e","brand":"Nord Seal","offers":[{"title":"Default Title","offer_id":47822619803862,"sku":null,"price":3364.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/5446\/2422\/files\/Untitleddesign-2026-02-07T190932.780.png?v=1770473521","url":"https:\/\/nordseal.com\/products\/kkl_500x500","provider":"NordSeal","version":"1.0","type":"link"}