There are many ways to eliminate pulsation in a peristaltic pump, mainly divided into internal optimization and external coordination.
1. Internal Optimization: This refers to solving the problem from the principle of the peristaltic pump itself. It can be addressed by optimizing the pump’s structure. There are two effective methods:
1) Reducing the number of rollers: Generally, increasing the number of rollers to 4, 6, 8, or 10 is the best way to reduce pulsation. It increases accuracy with low cost, but significantly reduces flow rate.
2) Increasing the number of pump head channels: This can also be understood as dual-pump operation, merging the outlet channels into a single pipe. This method offers higher accuracy and increased flow rate, but at a higher cost.
2. External Coordination: This refers to adding external components to the peristaltic pump to reduce pulsation. Common methods include installing dampers and optimizing the piping.
1) Installing a Damper: Connected in series in the outlet pipe, it uses the principle of peak and trough flow to balance the pulsation problem. The advantage is that pulsation can be reduced by more than 90%, but the cost increase is very high.
2) Optimize the pipeline: This mainly involves extending the length of the outlet pipeline, allowing the liquid to slow down automatically within a certain length of pipeline space, thus reducing pulsation.