The KVD 200630 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. Technical specification Nominal diameter DN/OD 200 (NPS/OD 8) Opening Pressure 48 mm HO (1.9 inh2o) Pressure 5 m HO (16.4 fth2o) Weight 5 kg (11 lb) # Bolt holes (#B) 8 Bolt Circle Diameter (BCD) 295 mm (11.6 in) Height center opening (H2) 170 mm (6.7 in) Total Height (Ht) 331 mm (13 in) Valve body length (L) 319 mm (12.6 in) Length Open (L2) 459 mm (18.1 in) Outer Ø (OD) 200 mm (7.9 in) Width 340 mm (13.4 in) Ø Bolt Holes (ØB) 22 mm (0.9 in) Flange bolt pattern Hole Pattern Acc. to EN1092-1:2018, PN10 Operating Temperature -25° C - +40° C Watertightness DIN 19569-4 table no. 1 Class 5 Valve body Polyethylene (PE) Flap Polyethylene (PE) Flap seal EPDM Product sheet (PDF) Technical specification (PDF) Dimensional drawing (PDF)