Instruction manual

3.8 Connect the DP180 to your exhaust-extraction system
WARNING
Pipe the exhaust to a suitable treatment plant to prevent the discharge of dangerous gases
or vapours to the surrounding atmosphere.
WARNING
Use a catchpot to prevent the drainage of condensate back into the DP180. Condensate
which drains back into the DP180 could damage it.
When you connect the DP180 to your exhaust-extraction system, take note of the following:
•
Incorporate flexible pipelines in the exhaust pipeline to reduce the transmission of vibration
and to prevent loading of the coupling-joints. If you use flexible pipelines, you must use
flexible pipelines which have a maximum pressure rating which is greater than the highest
pressure that can be generated in your system. We recommend that you use BOC Edwards
braided flexible pipelines.
• You must be able to isolate the pump exhaust from the atmosphere if you have pumped or
produced corrosive chemicals.
• You must adequately support exhaust pipelines to prevent the transmission of stress to the
coupling-joints.
Use NW40 fittings to connect the outlet-flange of the DP180 to your exhaust-extraction system.
3.9 Gas-ballast boost system
3.9.1 Gas-ballast boost not in use
When the gas-ballast boost is not in use (that is, the solenoid-valve is closed), some process gas
may leak in the reverse direction to atmosphere.
We therefore recommend that you either remove the air-filter and fit an NW10 blanking-plate or
use a positive-pressure nitrogen supply when you pump toxic, pyrophoric or flammable gases,
in order to prevent the leakage of gases into the atmosphere.
3.9.2 Standard air gas-ballast boost
As supplied, the DP180 has a gas-ballast boost system which delivers air to the gas-ballast boost
inlet of the pump. To use this system, connect the solenoid-valve to the electrical supply as
described in Section 3.5.5.
DP180 Dry Vacuum Pump 17