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4.4 Compressed air supply
Compressed air supply
Do not lubricate the air valves
Moisture in the air line
INFO: Suitable compressed air supply. The system operator is
responsible for the provision of a suitable compressed air supply.
When doing so, observe ISO 8573.
Connect the double diaphragm pump to a compressed air supply in
accordance with the current state of the art (ISO 8573-1).
Requirements:
Compressed air free of residual oil: Compressor residual oil:
n
–
maximum 0.1 mg/m³ for HEES liquids and bio-oils,
–
or maximum 5 mg/m³ for mineral oils.
Dried compressed air: ISO 8573-1, Class 4 with 3 °C pressure
n
dew point.
Our recommendation: ensure that the pressure dew point is at
least 10 °C below the ambient temperature.
1.
Design the compressed air supply to have generous dimen‐
sions. Your compressed air supply must be capable of sup‐
plying the double diaphragm pump with sufficient com‐
pressed air at any time and under all operating statuses. In
this respect, consider the air consumption of other equipment
and machines operated by the same compressed air supply.
Considerable pressure fluctuations can occur in the com‐
pressed air supply when switching compressed air con‐
sumers on and off.
2.
Do not allow the air pressure of the supplied air to exceed
7 bar (100 psi). Connect the air inlet of the double diaphragm
pump to a compressed air supply, which is designed to pro‐
vide the required pump capacity in terms of air volume and
pressure. Connect a control valve upstream of the double
diaphragm pump to guarantee the supply pressure remains
within the specified values.
3.
If there is a rigid air supply line, insert a short section of flex‐
ible hose between the double diaphragm pump and the pipe‐
work.
4.
Make sure that the weight of the air supply line, control valve,
and filters does not weigh down on the air connection fitting
of the double diaphragm pump, instead support it in a suit‐
able manner. Otherwise the double diaphragm pump can be
damaged.
INFO: Do not lubricate the air valves. Due to their design, the air
valves do not require any lubrication and must not be lubricated.
INFO: Moisture in the air line. Water in the compressed air can
lead to the exhaust air freezing or the double diaphragm pump
icing up. Possible consequences include malfunctions or failure of
the double diaphragm pump. We recommend installing an air dryer
in the compressed air supply. The air dryer extracts water from the
compressed air and protects it from icing up.
Assembly of the pump
15
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