flapvalve

Application

KWT valves are very varied and are used in connection to surface, sewer and process water systems. They are a very simple yet effective way to reliably prevent back flow into the system.

Operation

The correct flapvalve can be easily calculated by using an advanced calculation program. Dynamic preconditions play a decisive role, in particular in relation to certain applications as well as static conditions. KWT advises and supplies the correct flapvalve for all applications, regardless of whether they are being used in tidal, pumped or gravitational outflow applications. All our products are carefully calculated regarding strength and are produced using only pure, high-quality materials.
A flapvalve consists mainly of a plate that is hinged on the top side, connected to a mounting frame. It therefore forms an on-seated seal on the front of the culvert/pipe. Water discharging from the pipe opens the flap, however when the head increases on the downstream side, the
flap is pressed against it’s seal, preventing backflow. KWT flapvalves require only a small head in the pipe to open the flap, as HDPE floats in water- the flapvalves are fitted with a counterweight to balance the flap correctly. The flapvalve is light in weight, making the flapvalves easy to install, very responsive and also very reliable. The valves are available in various forms, such as the vertically hung flat wall mounted type, as well as pipe mounted, flange mounted and angled wall mounted (mounted on a 15° backward angle to reduce the effect of waves and ensure a good seal).KWT produces discharge and pump valves as standard in sizes from 100mm diameter upwards, and are happy to assist where something special is required. Please contact our sales department for more information or advice.

Benefits

Easy to install.
Relatively light in weight because HDPE is used.
Virtually maintenance free

Specifications

Sizes: Ø 100 mm to Ø 500 mm

Operating pressure:  Maximum 5 MwC
valve cover angle:     15° as standard except for flat-mounted wall models
Higher pressures and larger dimensions on request.
Various connection options such as: PVC/HDPE tube, flange,
wall, under an angle, concrete/SPIROsol.