impeller.net The Online Pump Magazine

13.11.2015

Verder Introduces the New Double Acting High Pressure AODD

For applications where the discharge pressure is higher than the available compressed air pressure and for filter- press applications, Verder now offers the new VA25-HP (DA) high pressure double acting diaphragm pump.


The new VA25-HD (DA) high pressure diaphragm pump is not only having the common high pressure pump advantages, such as:

  • Stalling against closed discharge, no safety pressure valve required
  • Boosting up pressure to 2 x the compressed air pressure
  • No need for ancillary equipment to regulate flow at raising discharge pressures

But also:
  • The same maximal flow rate as a standard Verderair VA25 diaphragm pump
  • Double acting; stable and efficient flow
  • Low to high pressure switch to be more efficient.


And is therefore the ideal pump for filter press applications.
The already existing range of high pressure diaphragm pumps, are of a single acting pump type, which is delivering fluid pressures up to 2 times the supplied compressed air pressure. This results in a pulsating flow, a high compressed air consumption and a reduction of the flow rate of 50%.

Pressure Switch
In addition the VA25-HP (DA) is having a switch to change the pump operation from low pressure to high pressure. At low pressure setting the pump is operating in normal, low pressure mode with an optimum use of the compressed air. At high pressure mode the pump is boosting up the liquid pressure to 2 x the compressed air pressure with flow rates that double the flow rate of the single acting high pressure pump.

Source: Verder Liquids

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