Abstract: A peristaltic pump having an array of compressible tubes in parallel substantially coplanar relationship with each other. A cylindrical rotor assembly including a series of equally spaced rollers around its periphery is located adjacent one side of the array of tubes, and a resiliently mounted platen assembly is located adjacent the other side of the array in position to urge the tubes into contact with the rollers. The platen assembly is provided with a first arcuate ledge portion which defines a first pair of spaced occlusion points and a second arcuate ledge portion which defines a second pair of spaced occlusion points.