WiPa Sifter units Type WS and WK

The air classifiers of the WS and WK series serve to separate materials of different specific densities and/or sizes. Materials with low specific density are “sucked in” by using negative pressure (i.e. vacuum).

 

WiPa Zigzag sifter Type WS

The materials are fed into the top of the sifter. The materials to be separated are given unpressurized over a rotary valve into the shaft of the zigzag sifter. Due to the gravity forces, the material trickles down and hits against every single bend of the unit continuously. A conveyor fan that serves to discharge the small or light particles, creates a counterflow in the zigzag channel. After each bend, the materials have to pass through the counterflow, whereby the light materials get separated from the heavy ones. The heavy materials are discharged from the bottom of the channel and get transported either pneumatically or mechanically to the downstream equipment.
Selectivity can be controlled either manually by means of a throttle valve, or electronically via a frequency inverter.

Possible applications:

Agglomeration -> Separation of fines and not-agglomerated materials from the product and cooling down of the materials at the same time
Household waste-> Separation of foils and thick-walled plastic or synthetic particles
Pelletizing-> Dedusting of the granules and cooling down of the materials at the same time
PET bottle processing -> Separation of PET flakes and PE/PP labels
Cable recycling - > Separation of PE/PVC -  cable sheathing and copper
Profile production -> Separation of protective foils from profiles, (on the end parts or blends)

 

WiPa Conical sifter Type WK

The materials are fed into the top of the sifter and, due to gravity forces, fall down onto the cone located underneath. The fines are sucked up through a pipeline which is connected sideways in the upper area. The heavy particles fall downwards out of the sifter unit. Selectivity can be controlled either manually by means of a throttle valve, or electronically via a frequency inverter.

The sifter unit type WK can be integrated into pipelines or Big Bag stations at a later time.

Agglomeration -> Separation of fines from the product, just before bagging it up in PET recycling, for example
Pelletizing -> Dedusting of granules, before bagging it up