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A pulsation dampener that decreases pump energy consumption

By Mary Page Bailey |

A new pulsation dampener benefits from a design that can reportedly decrease energy usage. The Expulse, a flexible, inline pulsation dampener recently released by Flowrox Inc. (Linthicum, Md; www.flowrox.us), consists of a reinforced outer hose and an expansive inner hose, with compressed-air filler gas between the layers. Along with stabilizing flow and reducing noise, the Expulse can also decrease pump energy usage by 10%, according to the company. In cases of high discharge pressure, the energy created by flow stoppage and kickback is temporarily stored in the Expulse’s inner hose and filler gas. Since some of the energy remains inside the dampener, flow kickback is decreased. In laboratory tests, the company observed a 15% increase in flow when using the dampener, meaning that with the dampener installed, desired flowrates could be achieved at a lower pump speed. Decreasing the pump speed while still achieving desired flowrates translates into around 10% energy savings for the pump. These energy savings, along with reduced vibrations and pulsations, lead to longer lifetimes for bearings and gearboxes. With its inner hose constructed of a specially made elastomer, the Expulse’s flexibility also sets it apart from steel-based…
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