flap valve
Product Description
Flap Valve
Flap valves are designed for use on the discharge end of pipes to prevent backflow or intrusion into the pipe. Typical applications include discharges to reservoirs, ponding basins and standpipes. Permits the outflow of water from a pipe or structure while preventing backflow. Used in reservoirs, tidal basins, ponding basins, pump stands and storm drain systems where seating heads are less than ten feet.
Features and Benefit
·Material as FRP, carbon steel, stainless steel, cast iron, HDPE for select
·Wide supply range(100mm to 3000mm or larger), customized designs available
·Reliable backflow prevention
·Smart design eliminates maintenance
·Corrosion resistant, will not warp or freeze open or shut
·No cracking pressure needed, low head loss, can be completely open to flood discharge
·Environmentally-friendly
Specifications
Nominal diameter: | DN25mm to DN3000mm, customizing design available |
Maximum working pressure: | 25 meter water |
Operating temperature: | -20℃-100℃(for usual) |
Open angle | >90 Deg |
Corrosion resistance | Yes |
Applicable media | Sea water, drinking water, slurry, industrial sewage. |
Components/Materials/Functions
NO. | Components | Materials | Functions | |
1 | Seat | By Request | Support | |
2 | Flange | By Request | Fasten | |
3 | Gate | By Request | Flow Control | |
4 | Seal | By Request | Seal | |
5 | Sleeve | HDPE | Anti-abrasion | |
6 | Hinge Pine | SS 304 | Hinge | |
7 | Nut | SS 304 | Fasten | |
8 | Cotter Pin | SS 304 | Fasten | |
9 | Eye Bolt | SS 304 | Support |
Design of FRP Flap Valves:
Design of HDPE Flap Valves:
Note:
Usually the flange drilling standard is based on DIN PN6, other standards available as ANSI CLASS150/300, DIN PN16/25, JIS10 etc. For special application, please contact GYLDT for detailed design.
Product Categories : Flap Valve