7.
Look at the pressure gauge in the inlet pipeline:
▪
If the pressure is increasing, immediately shut down the dry pumping
system and contact us.
▪
If the pressure is decreasing, continue to step 9.
8.
Visually check the purge gas dial pressure gauge on the rear of the pump to
ensure that the purge gas is being delivered to the pump. Continue to check
the dial pressure gauge regularly as the dry pumping system is used.
9.
After the dry pumping system is commissioned:
▪
To continue to operate the dry pumping system, refer to
on
page 103.
▪
Otherwise, shut down the dry pumping system. Refer to
on
page 104.
6.13.
Install additional safety equipment
WARNING:
If the control system needs to know the total flow rate of purge gas to the dry
pumping system for safety reasons, install suitable measurement equipment in
the purge gas supply pipeline.
WARNING:
If the gas purges are used to dilute dangerous gases to a safe level, ensure that
the dry pumping system shuts down if the purge gas supply to the dry pumping
system fails.
If the total flow rate of purge gas to the dry pumping system is required to be
known for safety reasons, suitable measurement equipment should be fitted in
the purge gas supply pipeline. If fitting a rotameter, ensure that it is suitable for
use with the purge gas and that it is correctly calibrated.
Ensure that the installation is configured so that it remains safe if there is a failure
of the purge gas supply to the dry pumping system.
If an alarm condition is detected, the dry pumping system will shut down
automatically. Ensure that the installation remains safe if the dry pumping system
shuts down automatically.
6.14.
Purge gas set up
For the dry pumping system, the shaft seal purge is always on. The HV shaft seal
purge is default set to high vacuum mode to keep high ultimate performance of
the pump. It can be adjusted to high flow mode by the manual valve (MV3, refer
to
on page 12) when necessary, ultimate performance might be
affected when MV3 is set to this mode.
There are also two manual valves for gas ballast control, they were set at the
close position as default. Different gas ballast flow rate can be achieved by
adjusting MV1 and MV2 manually, for details refer to
.
07/2021 - ©Atlas Copco
Page 99
1950840208_A
Installation
