{"title":"WAFLAP FLAP VALVE","description":"\u003cp\u003eThe \u003cstrong\u003eWaFlap™ Flap Valve\u003c\/strong\u003e provides reliable backflow prevention at open-channel drainage outfalls and coastal structures. No electricity required — seals automatically under backpressure. Corrosion-resistant construction. Supplied across the UK and Ireland by NordSeal. \u003ca href=\"\/pages\/contact\"\u003eContact us\u003c\/a\u003e for sizing and specifications.\u003c\/p\u003e","products":[{"product_id":"kvd_200-dn-od-200","title":"KVD_200 - DN\/OD 200","description":"\u003cp\u003eThe KVD 200–630 flap valve installs in piping systems to prevent backflow, such as at outlets to channels or pump stations. Its 15° inclined flap with a robust rubber hinge provides low hydraulic resistance in flow direction while ensuring reliable closure in case of backflow. Made of corrosion-resistant materials, it requires minimal maintenance and allows straightforward installation.\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\"\u003eNominal diameter\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eDN\/OD 200 (NPS\/OD 8)\u003c\/td\u003e\n\u003c\/tr\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\"\u003e48 mm H₂O (1.9 inh2o)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003ePressure\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e5 m H₂O (16.4 fth2o)\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\"\u003e5 kg (11 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\"\u003eBolt Circle Diameter (BCD)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e295 mm (11.6 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eHeight center opening (H2)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e170 mm (6.7 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eTotal Height (Ht)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e331 mm (13 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eValve body length (L)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e319 mm (12.6 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eLength Open (L2)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e459 mm (18.1 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eOuter Ø (OD)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e200 mm (7.9 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eWidth\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\"\u003eØ Bolt Holes (ØB)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e22 mm (0.9 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eFlange bolt pattern\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eHole Pattern Acc. to EN1092-1:2018, PN10\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\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eValve body\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003ePolyethylene (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eFlap\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003ePolyethylene (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eFlap seal\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eEPDM\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_kvd_flap_valve_200-630_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\/kvd_200\/tech-spec_kvd_200_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\/flap_gate\/kvd_200\/kvd_200_en.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↓ 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":47822565310678,"sku":null,"price":1205.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/5446\/2422\/files\/Untitleddesign-2026-02-07T184001.743.png?v=1770471609"},{"product_id":"kvd_450-dn-od-450","title":"KVD_450 - DN\/OD 450","description":"\u003cp\u003eThe KVD 450 flap valve installs in piping systems to prevent backflow, such as at outlets to channels or pump stations. Its 15° inclined flap with a robust rubber hinge provides low hydraulic resistance in flow direction while ensuring reliable closure in case of backflow. Made of corrosion-resistant materials, it requires minimal maintenance and allows straightforward installation.\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\"\u003eNominal diameter\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eDN\/OD 450 (NPS\/OD 18)\u003c\/td\u003e\n\u003c\/tr\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\"\u003e59 mm H₂O (2.3 inh2o)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003ePressure\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e5 m H₂O (16.4 fth2o)\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\"\u003e27 kg (59.5 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\"\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eBolt Circle Diameter (BCD)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e565 mm (22.2 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eHeight center opening (H2)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e307.5 mm (12.1 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eTotal Height (Ht)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e627 mm (24.7 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eValve body length (L)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e586 mm (23.1 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\"\u003e935 mm (36.8 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eOuter Ø (OD)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e450 mm (17.7 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eWidth\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e615 mm (24.2 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eØ Bolt Holes (ØB)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e26 mm (1 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eFlange bolt pattern\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eHole Pattern Acc. to ISO 2084-1974 (E), PN10\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\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eValve body\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003ePolyethylene (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eFlap\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003ePolyethylene (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eFlap seal\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eEPDM\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_kvd_flap_valve_200-630_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\/kvd_450\/tech-spec_kvd_450_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\/flap_gate\/kvd_450\/kvd_450_en.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↓ 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":47822584611030,"sku":null,"price":2960.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/5446\/2422\/files\/Untitleddesign-2026-02-07T184001.743.png?v=1770471609"},{"product_id":"kvi_225-dn-od-225","title":"KVI_225 - DN\/OD 225","description":"\u003cp\u003e\u003cspan\u003eKVI 180–630 is a flap valve designed for installation in existing plastic, concrete, or steel pipes (ID to be specified when ordering).\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eIt is used to prevent backflow, for example at the outlet from sewer systems to open channels or pump stations. The flap 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 less than 15° and mounted in a maintenance-free rubber hinge with embedded fabric reinforcement.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eThis design ensures low hydraulic resistance in the flow direction, while a flexible seal provides reliable closure in the event of backflow. The valve seals against the existing pipe using dual rubber rings.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eKVI 180–630 is made of corrosion-resistant materials and contains no mechanical components.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eIt is easy to install, requires minimal maintenance, and offers smooth opening in the flow direction with secure closure against reverse flow.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eApplications: Sewer systems, channels, and pump stations.\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\"\u003eNominal diameter\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eDN\/OD 225 (NPS\/OD 9)\u003c\/td\u003e\n\u003c\/tr\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\"\u003e48 mm H₂O (1.9 inh2o)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003ePressure\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e5 m H₂O (16.4 fth2o)\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\"\u003e6 kg (13.2 lb)\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\"\u003e123 mm (4.8 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eTotal Height (Ht)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e298 mm (11.7 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eValve body length (L)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e353 mm (13.9 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eLength Open (L2)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e513 mm (20.2 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eOuter Ø (OD)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e225 mm (8.9 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eOuter Ø min. (Od_min)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e205 mm (8.1 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eV\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e60 ° (60 °)\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\"\u003e250 mm (9.8 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\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eValve body\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003ePolyethylene (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eFlap\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003ePolyethylene (PE)\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_kvi_180-630_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\/kvi_225\/tech-spec_kvi_225_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\/flap_gate\/kvi_225\/kvi_225_en.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↓ 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":47822611611862,"sku":null,"price":1265.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/5446\/2422\/files\/Untitleddesign-2026-02-07T185316.408.png?v=1770472407"},{"product_id":"kvi_500-dn-od-450","title":"KVI_500 - DN\/OD 450","description":"\u003cp\u003e\u003cspan\u003eKVI 180–630 is a flap valve designed for installation in existing plastic, concrete, or steel pipes (ID to be specified when ordering).\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eIt is used to prevent backflow, for example at the outlet from sewer systems to open channels or pump stations. The flap 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 less than 15° and mounted in a maintenance-free rubber hinge with embedded fabric reinforcement.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eThis design ensures low hydraulic resistance in the flow direction, while a flexible seal provides reliable closure in the event of backflow. The valve seals against the existing pipe using dual rubber rings.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eKVI 180–630 is made of corrosion-resistant materials and contains no mechanical components.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eIt is easy to install, requires minimal maintenance, and offers smooth opening in the flow direction with secure closure against reverse flow.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eApplications: Sewer systems, channels, and pump stations.\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\"\u003eNominal diameter\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eDN\/OD 450 (NPS\/OD 18)\u003c\/td\u003e\n\u003c\/tr\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\"\u003ePressure\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e5 m H₂O (16.4 fth2o)\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\"\u003e34 kg (75 lb)\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\"\u003e283 mm (11.1 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eTotal Height (Ht)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e618 mm (24.3 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eValve body length (L)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e641 mm (25.2 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 Open (L2)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e1015 mm (40 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eOuter Ø (OD)\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\"\u003eOuter Ø min. (Od_min)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e450 mm (17.7 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eV\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e60 ° (60 °)\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\"\u003e560 mm (22 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\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eValve body\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003ePolyethylene (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eFlap\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003ePolyethylene (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eFlap seal\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eEPDM\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_kvi_180-630_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\/kvi_500\/tech-spec_kvi_500_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\/flap_gate\/kvi_500\/kvi_500_en.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↓ 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":47822612463830,"sku":null,"price":3117.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/5446\/2422\/files\/Untitleddesign-2026-02-07T185316.408.png?v=1770472407"},{"product_id":"kvi_630-dn-od-630","title":"KVI_630 - DN\/OD 630","description":"\u003cp\u003e\u003cspan\u003eKVI 180–630 is a flap valve designed for installation in existing plastic, concrete, or steel pipes (ID to be specified when ordering).\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eIt is used to prevent backflow, for example at the outlet from sewer systems to open channels or pump stations. The flap 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 less than 15° and mounted in a maintenance-free rubber hinge with embedded fabric reinforcement.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eThis design ensures low hydraulic resistance in the flow direction, while a flexible seal provides reliable closure in the event of backflow. The valve seals against the existing pipe using dual rubber rings.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eKVI 180–630 is made of corrosion-resistant materials and contains no mechanical components.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eIt is easy to install, requires minimal maintenance, and offers smooth opening in the flow direction with secure closure against reverse flow.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eApplications: Sewer systems, channels, and pump stations.\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\"\u003eNominal diameter\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eDN\/OD 630 (NPS\/OD 25)\u003c\/td\u003e\n\u003c\/tr\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\"\u003e74 mm H₂O (2.9 inh2o)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003ePressure\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e5 m H₂O (16.4 fth2o)\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\"\u003e64 kg (141.1 lb)\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\"\u003e357 mm (14.1 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eTotal Height (Ht)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e786 mm (30.9 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eValve body length (L)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e764 mm (30.1 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\"\u003e1260 mm (49.6 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eOuter Ø (OD)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e630 mm (24.8 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eOuter Ø min. (Od_min)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e558 mm (22 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eV\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e60 ° (60 °)\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\"\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\"\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\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eValve body\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003ePolyethylene (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eFlap\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003ePolyethylene (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eFlap seal\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eEPDM\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_kvi_180-630_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\/kvi_630\/tech-spec_kvi_630_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\/flap_gate\/kvi_630\/kvi_630_en.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↓ 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":47822612660438,"sku":null,"price":5543.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/5446\/2422\/files\/Untitleddesign-2026-02-07T185316.408.png?v=1770472407"},{"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"},{"product_id":"kkl_1000x1000","title":"KKL_1000x1000","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\"\u003e121 mm H₂O (4.8 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\"\u003e205 kg (451.9 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\"\u003e18\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\"\u003e1000 mm (39.4 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eHeight\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e1300 mm (51.2 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eHeight center opening (H2)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e650 mm (25.6 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eLength closed\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e490 mm (19.3 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eLength Open (L2)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e1180 mm (46.5 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eWidth\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003e1220 mm (48 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\"\u003e18 mm (0.7 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\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\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eValve body\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003ePolyethylene (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eFlap\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003ePolyethylene (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eGasket\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eEPDM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 14px 6px 0;color:#5f6e80;white-space:nowrap\"\u003eHinge\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;font-weight:600;color:#0d1b2a\"\u003eFiber Reinforced Sbr\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_1000x1000\/tech-spec_kkl_1000x1000_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_1000x1000\/fig\/kkl_1000x1000_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":47822621475030,"sku":null,"price":9223.0,"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\/collections\/waflap-flap-valve.oembed","provider":"NordSeal","version":"1.0","type":"link"}