Do I need a pulsation dampener?
Pulsation dampeners are commonly used wherever a positive displacement pump discharges flow in an unsteady manner, and where the pulse is not desired for the piping system. Air operated double diaphragm, metering and hose/peristaltic pumps typically benefit from a pulsation dampener.
What is the purpose of a pulsation dampener?
The pulsation dampener serves to reduce pulsation produced in operation and to assure stable discharge flow and pressure. When pulsations occur with pump operation, it will result in the pressure in Chamber B being greater than that in Chamber A.
What do pulsation dampeners do?
Why is the size of a pulsation dampener important?
More important, pulsation dampeners must be properly sized for the system. A dampener that is undersized cannot adequately compensate for pressure and flow fluctuations. An oversized dampener will act as an accumulator, storing too much fluid.
Can a pulsation dampener be installed in a pump nozzle?
Note: A pulsation dampener removes pulses only from the line downstream of the dampener—not upstream. That’s why it’s always recommended that discharge dampeners be installed as close to pump discharge nozzles as possible.
What happens to a dampener when it is undersized?
A dampener that is undersized cannot adequately compensate for pressure and flow fluctuations. An oversized dampener will act as an accumulator, storing too much fluid. This will cause slow stabilization and a delayed response to system changes. The first step in sizing a dampener is to quantitatively define the acceptable performance.
How is the pump constant of a dampener determined?
To determine the pump constant, the volume from a single pulse of the pump must first be determined. Then an initial estimate of dampener size is made, and the corresponding value of dampener volume is applied. The amount of gas in the dampener will be less than the total dampener volume, which needs to be factored into the calculation.