Compressed Air Supply - ProMinent Duodos 50 PPS Assembly And Operating Instructions Manual

4.4 Compressed air supply

Lubrication of the air valves
Moisture in the air line
Compressed air supply
Connect the double diaphragm pump to a com‐
pressed 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. 5 mg/ 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 provi‐
sion of a suitable compressed air supply. When
doing so, observe ISO 8573.
Design the compressed air supply to have generous dimensions.
Your compressed air supply must be capable of supplying the
double diaphragm pump with sufficient compressed air at any time
and under all operating statuses. In this respect also consider the
air consumption of other devices and machinery connected to the
same compressed air supply. Considerable pressure fluctuations
can occur in the compressed air supply when switching com‐
pressed air consumers on and off.
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 provide the required
pump capacity in terms of air volume and pressure. Connect a con‐
trol valve upstream of the double diaphragm pump to guarantee
the supply pressure remains within the specified values.
If there is a rigid air supply line, insert a short section of flexible
hose between the double diaphragm pump and the pipework.
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 suitable manner.
Otherwise the double diaphragm pump can be damaged.
Due to their design, the air valve and the pilot valve do not require
any lubrication and must also not be lubricated.
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 fitting an air dryer. The air dryer extracts the water
from the compressed air and protects it from icing up.
Assembly
15