Pulsation dampeners are vessels filled with compressed gas and process fluid, separated most often by a flexible bladder or diaphragm. The vessel is pre-charged with gas at a calculated value below the average system pressure before liquids are introduced.

Once the pumping system starts, fluid will enter the vessel and deform the bladder until the gas and fluid pressures equalize. When the system fluid pressure increases and decreases, the gas expands and contracts to reduce the magnitude of pressure pulsations - leading to smoother flow.

In other words, pulsation dampeners absorb the kinetic energy of your moving fluid, smoothing out the flow and pressure of your system – which means they minimize the damage caused by system fluctuations.