3P Volume filter VF7

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.

The arrangement of the various screen surfaces guaranteed an optimum maximum yield, depending on the volumetric flow to be cleaned.

If on low flows, solids which leave the lower sieves get dirty successively, they are flushed at higher volume flows again and deposited on the outer cascade.

This principle of self-cleaning combined to the different screen surfaces granted minimal maintenance while maintaining consistently high water yield.

The height difference between inlet and outlet is in spite of the maximum connectable surfaces of 2433 m² only 12.5 cm. These are – compared to the competitors up to 30 cm less.This allows addition of lighter schedule also maximizing the storage volumes.

Technical Data

Connectable area: 2433 m²

Maximum Flow Rate Sieve insert: 11 l/sec = 39.6 m³ clean water per hour

Rainwater inlet: 2 x DN 250

Connection inlet: DN 250

Outlet into tank: DN 200

Application

Installation of volume filters in the pre-chute

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

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