Compressed Air Supply - ProMinent Duodos 10 Assembly And Operating Instructions Manual

Assembly

4.4 Compressed air supply

Lubrication of the air valves
Moisture in the air line
14
Compressed air supply
The double diaphragm pump must be connected to a
compressed air supply in accordance with the current
state of the art (ISO 8573-1). We require unoiled,
residual oil-free (residual oil from the compressors of
maximum 0.1 mg/m³ for HEES-liquids, bio-oils or max.
5mg/m³ permitted for mineral oils) and appropriately
dried compressed air (ISO 8573-1, class 4 with 3 °C
PDP).
Our recommendation is that the pressure dew point
must be at least 10 °C below the ambient temperature.
Suitable compressed air supply
The system operator is responsible for the provision of
a suitable compressed air supply. In doing so, observe
ISO 8573.
Layout the compressed air supply with generous dimensions. Your
compressed air supply must be able to supply the double dia‐
phragm pump with sufficient compressed air at any time and under
all operating statutes. In this respect also consider the air con‐
sumption of other devices and machinery connected to the same
compressed air supply. Considerable pressure fluctuations can
occur in the compressed air supply when switching compressed air
consumers on and off.
The air pressure of the supplied air must not exceed 7 bar (100
psi). Connect the air inlet of the double diaphragm pump to a com‐
pressed air supply, which is designed to provide the required pump
capacity in terms of air quantity and pressure. To guarantee the
supply pressure remains within the specified values, a control
valve should be connected upstream of the double diaphragm
pump.
In there is a rigid air supply line insert a short piece of flexible hose
between the double diaphragm pump and the pipework.
The weight of the air supply line, control valve, and filters must not
weigh upon the air connection fitting of the double diaphragm
pump, rather it must be supported in a suitable manner. Otherwise
the double diaphragm pump can be damaged.
Based on their design, the air valve and the pilot valve do not
require any lubrication and indeed must not be lubricated.
Water in the compressed air can lead to the exhaust air freezing or
the double diaphragm pump icing up. The possible consequences
are malfunctions or failure of the double diaphragm pump. It is rec‐
ommended that an air dryer is fitted. This extracts the water from
the compressed air and protects against icing up.