Instruction manual

1.3 Gas-ballast boost
The DP180 has a gas-ballast boost system which delivers air to the pump gas-ballast boost inlet.
The flow of air is filtered and is controlled by a solenoid-valve. You can connect the
solenoid-valve to your control equipment to operate the solenoid-valve.
If you wish, you can connect a nitrogen supply to the system in order to deliver nitrogen to the
pump instead of air.
1.4 Temperature control system
The pump is cooled by water which flows through an integral cooling-jacket. The pump is
maintained at a constant operating temperature by a thermostatic control-valve (TCV) which
controls the supply of cooling-water to the pump.
The pump-motor is air-cooled by a cooling-fan which is integral to the motor.
A thermal snap-switch is fitted to the pump-body. This switch shuts down the pump if the pump
is too hot. The switch (which is normally-closed) is connected to the overload control loop of the
pump-motor starter. When the temperature of the pump-body rises to 71
o
C, the switch opens
and the pump-motor is switched off.
1.5 Accessories
If the DP180 pump is to be used on clean applications, the pump-outlet can be fitted with a
stainless steel flap-valve accessory. On dirty applications, if the use of an outlet-valve is
necessary, we recommend that you fit a fluoroelastomer flap-valve accessory.
A full list of the accessories available for the DP180 pump is given in Section 7.
2 DP180 Dry Vacuum Pump