Peristaltic hose pump, Verderflex VF, is simple by design in its construction and operation. The medium to be pumped does not come into contact with any moving parts and is totally contained within a robust, heavy-duty hose, which usually consists of an inner layer, two – six reinforcement layers and an outer layer. A rotor passes along the length of the hose, compressing it. This motion forces the contents of the hose directly in front of the rotor to move forward along the length of the hose in a ‘positive displacement’, peristaltic movement. In the wake of the rotor’s compressing action, the natural elasticity of the polymer reinforced rubber forces the hose to open and regain its round profile, creating suction pressure, which recharges the pump