Air Operated Double-Ended Diaphragm (A.O.D.D.) Pump Pulsation Dampeners

    

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. How to ensure lowest in place cost and most performance by standard pulsation dampener installation methods.

1. Plastic with Elastomer Bladder / Application Example

2. Plastic with PTFE Diaphragm / A.O.D.D. Pump Flow Fluctuation Smoothing

3. Stainless with PTFE Diaphragm / Cushion Pre-Fill Pressure and Installation

4. Stainless with Elastomer Bladder / Plastic or Stainless Wetted with Elastomer Flex Tube

AIR OPERATED DOUBLE-END DIAPHRAGM (A.O.D.D.) Flow Fluctuation Figure

Make a note of this pump's F number, also known as its Flow Fluctuation Figure. Use the F number with the % residual fluctuation required figure from the smoothness shown for each type of application. These two figures, the F figure and the % figure, applied to the size selection formula give you the smallest practicable dampener size.

Find the "F" Valve of Your Pump - "F" is a correction Factor on the square of number of displacers.
Example, Centrifugals are intrinsically good - have a high F, Sandwich diaphragm metering pumps have a low F.
F = 1.8

The F figure assumes that the air supply to the A.O.D.D. is enough to ensure no return stroke delay.
An air operated double end diaphragm pump empties a 40 gals. drum in 4 mins., on a 2 second cycle
10 gals per minute x 231 in3 per gallon / 2 diaphragms per cycle x 30 cycles per min. = 38 in3 per end @ 1.0 Hz.

Dampeners shown are for preventing piping systems from converting diaphragm changeover pause, into pressure pulses. Two connection dampeners are standard lowest cost. Where no OSHA requirement for in place flush before service, nor process need for 1st in 1st out, constant temperature, change of liquid pumped, interception of pressure pulsation, use second connection to save a "T" for RV. PI, or system drain.

Additional AODD Pump Pulsation Dampeners Information:
Pulsation Dampener | Pulsation Dampener Drawings | Pulsation Dampener Safety