The existing 2000mm diameter outfall flaps and a 600mm dia flap were installed in 1998, to prevent the River Tees backing up the Lustrum…
Flapvalves- simple yet effective protection
- Quick and Easy to install
- Lightweight yet robust
- Low head losses
- Virtually maintenance free
- Various mounting arrangements
- Fish friendly solutions available
ACE KRK Flap valves are available in a wide range of models, chosen to suit our customer’s individual needs. They are manufactured in HDPE and Stainless Steel 316L, making them lightweight for ease of handling and installation, without compromising strength. HDPE is very shock absorbent, and does not crack if struck, making it ideal for this type of equipment.
KRK Flapvalves are either bolted to a wall using resin anchors, or pipe mounted using a number of quick and easy methods depending on applications, all of which do not usually require grouting- typically KRK flapvalves take a matter of hours to fit, with minimal setting-dry and no curing time. The benefits to cost and time saving are clear when compared with more traditional types.
Using self lubricating hinges, KRK Flapvalves only require occasional visual inspection to check for obstruction, and no greasing is required. The EPDM seal also allows for some wear, offering reliable protection throughout the lifetime of the product.
Although HDPE is lightweight yet robust, it is also partially buoyant in water, so when the KRK flapvalve is fitted with it’s counterweight, it is perfectly balanced; the upstream head required to open it is minimal, but full closure is ensured as soon as it’s needed.
As some outfalls require reliable protection from flooding, but in doing so create a barrier to fish migration, ACE offer a number of fish friendly flap valves, and are more than happy to discuss your requirements to provide a suitable solution- please contact us for more details.
If fitted to a pumped outfall, or to a sea outfall, more heavy duty flap valves are also available, so please contact ACE if you have requirement in a more aggressive environment, and we will be happy to help.
Although ACE stock a wide variety of sizes of KRK flapvalve for quick dispatch (100-800mm), our flapvalves can be customised to suit specific requirements, either to adhere to particular specifications, or to save complicated construction, or modification to existing structures.
Since introduction of the HDPE KRK Flap valve range, the material has become synonymous with high quality, reliable flood defences, offering extremely good value for money over it’s life- it’s not just any “plastic” valve!
For more information on our previous flap valve projects, please see our case studies.