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risk of lime deposits forming within the machine,
affecting its performance. In such cases, appropriate
measures should be taken, such as the addition of
water softeners or the installation of an ionic
accelerator. These measures help mitigate the risk of
lime deposits and ensure smooth Operation.
It is essential to select an operating liquid that meets
the specific requirements of the liquid ring machine
and the application. Considering the properties of the
operating liquid and taking necessary precautions
helps maintain the machine's performance, longevity,
and safety.
CAUTION!
Risk of Damage Due to Calcification
Over time, hard lime layers can develop and eventually
break open, leading to potential erosion damage to
components. It is crucial to implement preventive
measures to continuously prevent the formation of
lime deposits or perform regular removal procedures.
WARNING!
Risk of Environmental Damage
If the operating liquid used is harmful to the
environment, it is crucial not to drain it off into the
open. Instead, it must be circulated in a closed circuit
with forced circulation to prevent any potential
environmental damage.
5.2.3 Types of Liquid Compressant
There are two variants of the operating Liquid in
liquid ring machines depending on the internal
routing and cooling requirements:
1. Normal Cooling (Economy Circulation): This is
the standard design for the machine. In normal
cooling, a portion of the operating liquid that is
discharged from the machine is recirculated back into
NBE O & M Document No. NES/NBE/O&M
the system. This recirculation helps maintain the
desired operating liquid flow and temperature. The
volumetric flow rate of the operating liquid
corresponds to the values specified in the machine's
specifications.
2. Increased Cooling (Refrigeration Circulation):
This design is specific to certain vacuum pump models
and is the standard design for compressors. Increased
cooling is used when operating conditions are
unusual, such as handling gases at high temperatures
or when higher suction capabilities are required. In
this case, the operating liquid is completely removed
from the machine and replaced with new, cooler
Liquid. The internal partial circuit is closed, and the
necessary adjustments, such as mounting plugs, are
made for permanent use. The volumetric flow rate of
the operating liquid is doubled compared to the
specifications for vacuum pumps mentioned in the
specifications.
The choice between normal cooling and increased
cooling depends on the specific requirements and
operating conditions of the liquid ring machine.
Consulting with the manufacturer or a qualified
service provider can help determine the most suitable
variant for a given application.
5.3 Draining and Flushing
Draining: For draining and flushing the machine,
open the shut-off valve.
• Locate the shut-off valve on the drainpipe connected
to the draining and flushing connection.
• Place a suitably large catch container beneath the end
shields of the machine.
• Unscrew the plug to completely drain the liquid
from the end shields.
After fully draining the machine:
• Close the shut-off valve for draining and flushing.
• Reinstall the plug in its original position.
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