Instruction manual

4 OPERATION
WARNING
Take all appropriate safety precautions when you pump oxidants or pyrophoric or
flammable gases.
4.1 Start-up
Use the following procedure below to start up the pump.
1. Check the gearbox oil-level in the sight-glass on the side of the pump (Figure 4, item 4). The
oil-level must be between the MIN and MAX marks when the pump is cold and at rest. If
necessary, pour more oil into the pump (refer to Section 3.3) or drain oil from the pump (refer
to Section 5.5).
2. Switch on the electrical supply, the cooling-water supply, the nitrogen supply and the
exhaust-extraction system (if fitted).
3. Check all of the water, nitrogen system, exhaust-extraction system (if any) and vacuum
system connections.
4. Switch on the DP180.
5. If required, use your control equipment to open the gas-ballast boost solenoid-valve. Set
your nitrogen supply pressure and flows to suit your process conditions.
4.2 Shut-down
Use the following procedure to shut down the DP180.
1. Isolate the pump-inlet from your vacuum system and operate the DP180 for 15 minutes with
the gas-ballast boost solenoid-valve open.
2. Close the gas-ballast boost solenoid-valve and switch off your nitrogen supply (if fitted).
3. Switch off the DP180.
4. Turn off the cooling-water supply and your exhaust-extraction system (if fitted).
DP180 Dry Vacuum Pump 21