Description

Specialist rainwater filter for installation directly in the ground, for heavily contaminated traffic areas up to 100m². The filter function is an up-flow process and this allows for a design with little height difference between inlet and outlet. The cleaned water has an excellent water quality. The rainwater is cleaned by basic operation of the following processes: Sedimentation, Adsorption, Filtration, and Chemical Precipitation. Incoming rainwater is led down to the basal section of the filter shaft. A hydrodynamic separator built in the base section promotes particulate sedimentation.

The water is led into this separator tangentially and generates a radial flow pattern. Particles settle into the silt trap located below the separation chamber. As there is no current there is little remobilisation (washout) of the retained sediment. Above the separation chamber is the filter element, occupying the full shaft width and so all water must flow up through it. The Siltation of this filter is slowed due to the upwards flow, and the fact that the filter is below the water level. The filter is easily exchanged. The complete single filter element is removed using the handle inside the overflow pipe. Under normal conditions the filter will last for 2 years, maintenance free.

How it works

1. The rainwater from the connected area is fed into the basal section of the filter housing. The angled inlet generates a radial flow pattern.
2. The hydrodynamic separator converts turbulent waters into a radial laminar flow pattern, generating particle sedimentation, particularly of the sand fraction.
3. This takes place over an inlet to the lower section of the filter shaft. The sediment is retained in a silt trap chamber below the separator. The silt trap can be withdrawn for cleaning, and has an integral cleaning port to the side to ease dirt removal, (see 6).
4. In the central section of the filter housing is the actual filter, Filter Roof. The filter element filters out the fine materials in an up-flow process and dissolved materials are precipitated and adsorbed. The filter is backwashed from above. When exhausted the filter is easily exchanged.
5. The filter element is easily pulled up and removed from the shaft housing.

Technical Data

Rainwater filter complying with DIN 1989-2, Type b. For traffic areas to 100m². Connections at DN110.

Filter Element:
Material: Filter Substrate: Traffic
Weight 25 kg

Housing:
Material: Polyethylene
Housing: 7 kg

Telescopic Extension Tube:
Material: Polyethylene
Weight: 5 kg

Total weight: 37 kg (without Telescopic Extension).

For installations directly in the ground the 3P Telescopic Extension can be used (see Plate above). The 3P Telescopic Extension can be used between a minimum of 250mm and a maximum of 750mm.

Produktaufbau

1. Rainwater Inlet.
2. Separator.
3. Silt Trap to trap sediments.
4. Opening for cleaning.
5. Filter Element with overflow pipe and removal handle.
6. Outlet to rainwater tank and or soakaway system.
7. Lid.
8. Bayonet Fitting lugs for fitting telescopic extensions.

Example

The 3P Hydrosystem 400 Heavy Traffic, for heavily contaminated highway drainage. Picture is schematic for illustration only.

Accessories

3P Telescopic Extension, Art No 1000560.
Plastic telescopic extension shaft for installation direct in the ground.
Material: Polyethylene.

Accessories

3P Filter Element Heavy Traffic:
Art No 110042 For the 3P Hydrosystem 400 heavy traffic.

Definition of “Traffic”

Heavily contaminated waters defined as drainage from over 5000 vehicles per day.