Coanda 2 1/2 Intake Screen

The new smaller PowerSpout Coanda 2 intake screen comes in 2 sizes. This 1/2 screen version is rated for 3 l/s. Click here for the full sized version.

This Coanda 2 intake removes rubbish, stones, leaves and aquatic life forms from the water flow prior to entering the supply pipe. A poor intake screen is normally the cause of most water supply problems. Poor intakes may allow debris and aquatic life to enter the pipe that can block water supply pipes.

Our Coanda 2 intake screen is not limited to domestic water supplies, it can also be used for small flow hydro schemes, such as our range of PLT turbines. This small screen will find applications for domestic, farm, village and small-village water supplies.

Our Coanda 2 intake screens are designed to provide cost effective and low maintenance screening solutions for water intakes without the need for any moving parts. The self-cleaning ability and high abstraction flow capacity is due to the shape of the screen and the arrangement of the wedge wires that make up the screen.

The Coanda 2 screen uses the Coanda effect, which is the phenomena in which a jet flow attaches itself to a solid surface and remains attached, even when the surface curves away from the initial direction. The screen is built from wedge-shaped wires that have suitably angled faces to which the flow attaches.

Water is directed over the screen in a fast-moving sheet, and the bars deflect it into a tank below whilst debris continues straight on and is washed off by the surplus flow.

Water and some fine silt particles (<2.0mm) pass through the screen, whilst larger silt and debris is excluded and deposited downstream. During times of low river flow the screen capacity may be greater than the available water. Under these conditions debris can build up on the lower parts of the screen. This will be washed off the next time the river flow rises above the demand/screen capacity.

You can order your intake with a 2" BSP male thread or an 2" NPT female thread (small surcharge applies for a BSP to NPT an adaptor fitting).

Once the pipe is connected to the intake it can be concreted over to help protect from floods. It is very unlikely you will ever need to separate the intake tank from the pipe again. Once concreted in stainless screen and aluminium catchment tank face are still by 4 x M8 fixings. So even if you do sustain damage in a large flood event, with luck it can still be repaired.

For more details and assembly instructions, read our PowerSpout Coanda 2 Intake screen specification and general advice guide.

Please note that the safety/install/maintenance instructions are not repeated, as they are identical to our larger Coanda manual instructions that you must read here for this important information.

Refer to PowerSpout Document Index Links for a complete index of documents.