Pall Rings are designed to have a low pressure drop while still offering excellent mass transfer capabilities. Their str

Pall rings are the most widely recognized type of arbitrary pressing. They are like Lessing rings and were created from

They are made of polypropylene pall ring, Polyethylene pall ring, RPP pall ring, PVDF pall ring, PVC pall ring, and

 so that a gas and a liquid can more efficiently come into contact with each other, achieving a lower pressure loss