A study on the pulsation reduction effect of a valve composed of elastic bodies.

The peristaltic pump is the most widely used actuator in a situation where constant deliver is important. The purpose of this study is to completely control the flow pulsation generated in the process of suctioning and transmitting fluid by the peristaltic pump. The study was began based on the flow that comes out when a small hole is made in a water filled balloon. We have manufactured a valve composed of an elastic body such as rubber balloon, it could be possible to remove all pulsation of the fluid passing through the pump. In this paper, the manufacturing and experimental method of the elastic body is explained. We measured a pulsation using piezoelectric effects for comparing with commercial constant valve. We prove that pulsation can be effectively reduced when the elastic body is used. The obtained maximum reduction ratio of flow fluctuation is 98.03%. Maximum reduction ratio of Commercial constant valve is 85.46%. This means that the softvalve we manufactured is useful.