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Verder Pumps South Africa introduces a new double-acting high-pressure AODD pump
Industrial pump manufacturer and dis-
tributor Verder Pumps South Africa now
offers a new, FDA-approved high-pressure,
double-acting diaphragm pump, suitable for
filter-press applications where the discharge
pressure is higher than the available com-
pressed air pressure.
The new VA25-HD (DA) high-pressure
diaphragm pump features the traditional
advantages associated with high-pressure
pumps, including
• stalling against closed discharge, which
means that no safety pressure valve is
required;
• boosting pressure double the com-
pressed air pressure;
• no need for ancillary equipment to regu-
late flow at raising discharge pressures.
Some features that are unique to this pump
include:
• The new model has the same maximal
flow rate as a standard Verderair VA25
diaphragm pump
• It is double acting, therefore produces
stable and efficient flow;
• It has a low to high-pressure switch that
allows for it to be more efficient.
The VA25-HP (DA) is, therefore, the ideal
pump for filter-press applications.
The existing range of high-pressure
diaphragm pumps, which are single-acting
pumps, can deliver fluid pressures of up to
double the supplied compressed air pres-
sure. This results in a pulsating flow, high
compressed air consumption and a 50 %
reduction of the flow rate.
In addition, the VA25-HP (DA) pump has
a switch to change the pump operation
from low pressure to high pressure. At the
low-pressure setting the pump operates in
normal, low-pressure mode with optimum
use of the compressed air. When operating
in high-pressuremode, the pump boosts the
liquid pressure to double the compressed
air pressure; with flow rates double that of
a single-acting, high-pressure pump.
For more information: Verder Pumps South
Africa, email
FOCUS ON PUMPS &VALVES
Example of a filter
press application
with Verderair
VA25-HP (DA)