Clean The Intake Strainer - Pfeiffer Vacuum HENA 26 Betriebsanleitung

Maintenance
Clean the float valve and operating fluid return line
1. Clean the float valve.
2. Clean operating fluid return line with compressed air.
Mounting the float valve
1. Check the function of the float valve.
2. Mount the float valve in the correct installation position in the valve holder.
3. Mount the valve holder with a new o-ring onto the operating fluid separator.
4. Mount the elbow union and the operating fluid return line.
5. Refill the operating fluid.
6. Start up the vacuum pump.
7. Perform a final pressure test on the operating fluid return line to check for leaks.
7.7 Clean the intake strainer
The intake strainer in the vacuum connection upper section must be cleaned:
● when the throughput decreases
● if there is visible contamination
Prerequisites
● Vacuum pump switched off
● Vacuum pump is vented to atmospheric pressure on the suction side
● Vacuum pump cooled
Required tools
● Hexagonal wrench, WAF 13
● Calibrated torque wrench
Fig. 21:
1 Cylinder screw (4x)
2 Washer (4x)
Dismantling the intake strainer
1. Dismantle the intake line.
2. Unscrew cylinder screws.
3. Remove the vacuum connection.
4. Remove the intake strainer from the intake duct.
5. Dismantle the part of the non-return valve resting in the intake duct.
110/130
– Make sure that the float moves easily by its own weight.
– Make sure that the axial sealing surface on the floater is clean.
Dismantling / assembling the intake strainer
– Pay attention to the washers.
1
2
3
4
3 Vacuum connection
4 Intake strainer