PTFE (Polytetrafluoroethylene) filter bags are used in very aggressive environments, where the continuous working temperature reaches up to 260°C.
Due to the fiber properties, this excellent chemical resistant PTFE needle felt is available in weights beginning at 600 g /m2. To reach an air permeability of approx. 100 l/dm 2 * min, the area weight of the material should be 750 g/m2.
This material provides very high filtration efficiency and the highest possible among all needle felts chemical resistance against acids, alkalis, hydrolysis, solvents, and oxidizing.
In the oil and water repellent version, which is most often obtained by a deep resin full-bath, the needle felt achieves even better parameters in terms of non-adhesiveness and the risk of condensation of water vapor.
Please note that, due to mechanical sensitivity of this polymer, the supporting cages (used for the bags made of this needle felt) should provide a sufficiently dense support.
Applicable in the following industrial sectors:
- energy industry
- heating plants
- desulfurization plants
- incinerator plants