Pfeiffer DUO 3 - Refilling operating fluid

4
3
5
2
1
Fig. 12: Gas ballast valve with inert gas connection
1 Dosing screw 4 O-ring
2 Hexagon socket screw, 2× 5 Valve housing
3 Hose connection, G 1/8" (locking screw removed)
Avoiding shearing of hexagon socket screws
Fit the hose connection G 1/8" on the valve housing before you fit the valve housing on the
vacuum pump, in order to prevent shearing of the hexagon socket screws.
Connecting gas ballast valve with inert gas connection
1. Unscrew and remove the locking screw from the gas ballast valve.
2. Fit the G 1/8" hose connection (scope of delivery) on the valve housing.
–
Be careful with the o-ring.
–
Tightening torque: 3.0 Nm
3. Install the valve housing with the hexagon head screws on the vacuum pump.
–
Be careful with the o-ring.
–
Tightening torque: 1.0 Nm
4. Connect a hose (DN 5 mm) to the hose connection with a hose clamp, or use the G 1/8" threaded
connector directly.
Establishing inert gas supply
1. Select the type and quantity of the inert gas used according to the specific process.
–
Consult Pfeiffer Vacuum if necessary.
2. Set the inert gas pressure to max. 1500 hPa (absolute).
3. Make sure that the inert gas pressure is greater than the respective intake pressure.
4. Set the desired gas quantity using the dosing screw.
–
Observe the technical data (gas ballast flow).
–
Turn the dosing screw to the right in order to close the valve.
–
Turn the dosing screw to the left in order to open the valve.
6.4 Refilling operating fluid
WARNING
Danger of poisoning from toxic vapors
Igniting and heating synthetic operating fluid generates toxic vapors. Danger of poisoning if inhaled.
►
Observe the application instructions and precautions.
►
Do not allow tobacco products to come into contact with the operating fluid.
Required tools
●
Allen key, WAF 5
●
Calibrated torque wrench (tightening factor ≤ 2.5)
Operation
33/64