FELUWA MULTISAFE® double hose-diaphragm pumps
for abrasive, aggressive and toxic media
 

Pulsation dampening

A typical characteristic of oscillating displacement pumps is the hydro-dynamic independency of the delivery flow from the pressure and vice versa.

The reason is due to the mechanics of pressure generation by means of a displacement piston which prevents backflow and thus an escape of the displaced volume into the pipework. This principle allows for the achievement of extraordinarily high efficiencies. Conversely, the oscillating movement causes undesirable flow fluctuations and pressure pulsations.

To avoid such pressure pulsations, an array of different pulsation dampeners is employed. Dependent on the actual working conditions, traditional pulsation dampeners (pressure air vessels) with air or gas cushion or so-called hose-diaphragm pulsation dampeners (PULSORBER) with nitrogen-filled accumulators are applied.

Pulsation dampening by means of FELUWA pulsation dampeners with additional air vessel function

1. Hose-diaphragm pulsation dampener
2. Bladder-type accumulator
3. Pressure gauge
4. Piping with conveyed fluid
5. Check valve
6. Oscillating displacement pump

Delivery flow characteristics