Disclosed is a fluid isolating pump. The fluid isolating pump includes a rotating cage, one or more roller assemblies mounted on the rotating cage, a cam plate, and a non-rotating central shaft. The cage includes a front plate and a back plate connected by multiple connecting rods. Each roller assembly is rotatably attached to a corresponding connecting rod of the cage. Each roller assembly includes one or more arms rotatably attached to the connecting rod, a connecting bar coupled to the one or more arms, one or more levers rotatably attached to the connecting rod, one or more suspensions, and a roller. Each suspension is coupled to at least one arm and to at least one lever. The roller is coupled to the one or more levers. The cam plate includes multiple openings having a first end and a second end. The connecting rod of each roller assembly is configured to slide from the first end of the opening to the second end of a corresponding opening.