3P Volume filter VF3

Industrial filter

Operating principle

  1. As water arrives the level builds up and overtops the filter lip, so ensuring it is distributed evenly across the whole width of the filter cascade.
  2. Pre cleaning through the cascades. Largest dirt particles are led across the primary filter cascades directly to the sewer.
  3. Pre filtered water then flows over the secondary filter sieve (Mesh size 0,4 x 1 mm). Due to the special mesh structure of the sieve, any dirt falls directly down onto the bottom of the shaft. In case of heavy rainfalls, the filter has more loss, as the water washes away the filtered dirt into the sewer.
  4. The cleaned water is being absorbed in the lower tank and directed through a tube DN 150 into the storage.
  5. Dirt goes to the sewer through the shaft.

Rainwater filter for bigger roof areas. The 3P Volume Filter has to be installed in a shaft (Ø 1000 mm).

Normally standard concrete shafts are used. The filter can be delivered to the site pre-assembled in the shaft.

Two step cleaning system, therefore high level of filtering efficiency, independent of flow rate.

Due to the steep inclination of the filter cartridge the dirt is continuously washed away into the sewer.

The connection to the sewer is installed at the shaft. The dirt falls down on the bottom of the shaft and is washed away with the next strong rainfall.

Technical Data

Relative connection capacity according to DIN 1986:

for roof areas up to 1347 m² at a rainfall intensity of 300 l/(sxha)

Because of a Bypass-Installation a bigger area can be connected.

Maximum flow rate of filter sieve: 4.5 l/sec = 16.2 m³ clean water per hour.

Rainwater inlet: 2x DN 200

Outlet to storage: DN 150

Outlet to sewer: DN 200

Height difference between inlet and outlet: 320 mm

The filter has to be cleaned depending on the dirt 1 - 2 times during the year

Mesh size: 0.390 x 0.980 mm

Weight: 33.2 kg

A 670 mm
B 540 mm
C 525 mm
D 980 mm
E 320 mm
F 275 mm
G 880 mm

Filter test

Average rainfall in Germany 80% less than 15 l (sxha), resulting in a volume flow of 2.02 l/s for a roof area of 1347 m².

Pipe diameter: DN 200
max. flow rate: 40,4 l/s
connectable area at max. 200 l/(sxha): 2020 m²
connectable area at max. 300 l/(sxha): 1347 m²

Application

Installation of a large filter in the foreshaft

Use in front of several concrete cisterns connected in series

If the size of the roof area or the pipe diameters deviate from the specifications, a DIN-compliant installation can be carried out as shown below.

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