Pulsation Dampeners for AODD Pumps

A.O.D.D. Pump Pulsation Dampener Standard Installations. How to ensure lowest in place cost and most pulsation dampener performance by standard installation methods. Pump 3 times farther with no greater air A.O.D.D. supply, make flow as smooth as a turbine, install Plastic or SS + Elastomer or "FlexFlon" pulsation dampeners.

Flow fluctuation occurs from an AODD because of the pause for direction change between strokes, left and right. The pause in flow, from AODDs, is compensated for by the peaks of that have been accumulated. By accumulating the peak flow to fill the pauses, the flow becomes nearer to constant flow. Flow from accumulating without fluctuating flow, removes the need for sudden flow acceleration and deceleration. The pressure caused by constant flow is constant pressure, and because there is no pressure pulsation from a flow fluctuation, these devices are mis-named "dampeners". As the pressure pulsation had been prevented in the first place, there was none to be "dampened". So, these devices must be flow fluctuation accumulators, not pressure pulsation dampeners.

"Dampeners" for flow fluctuation accumulating on AODDs are in many materials and configurations:

Below 40psi (approx. 3 BarG) the pressure used to drive a liquid of more than 50 cP into a halt, back out again from a "T" piece, and leave pulsation in the system. If you want smooth flow below 40psi, or to be able to flush your system, then always use a FLOW-THROUGH two connection pulsation dampener.

Accumulating the flow fluctuations from AODDs can be done with pulsation dampeners using one connection on a "T" because they stroke so slowly that there is enough time to flow up, stop, & come back out one pulsation dampener connection. Single connection pulse dampeners are available, but flow-thru is standard. Single connection is more costly. You can always take a 2 connection and use one & the other for system drain.

Plastic or Stainless wetted + Elastomer FlexTube is for high viscosity, and food or beverage applications. All boltings are in “thread-certs” end faces to ANSI 150# or DIN PN10. Hydraulically (water) operated, double ended diaphragm pump up to 275psi or 19 Bar. Flow fluctuation accumulating, with viscous liquids requires a flow-through pulsation dampener configuration otherwise there is insufficient time, considering the "velocity drag", to flow in, stop, & come back out one of the pulsation dampeners connections.

For your PTFE compatible applications we offer LDi “FlexFlon”, which is PTFE that has been remelted and molded to provide flexibility without elastomeric backing.

The susceptibility to damage of plastics and the lower cost of our all stainless dampeners make PipeGuard the safer and better value choice.

Pulsation Dampener Selection for AODD Pumps

The time delay of direction change governs dampener size. The essential is a large air hose to drive the pump. With large air supply, the pulse to be filled is only one sixth of the volume displaced per stroke end.