BOLLFILTER TYPE-6.48: LUBE AUTO BACKWASH FILTER MAINTENANCE / CLEANING PROCEDURE

BOLLFILTER TYPE-6.48: FILTER CLEANING PROCEDURE:
Preparatory work

1.0 Take the plant out of operation or open the shut-off valves of the by-pass line.

2.0 Close the shut-off valves on the connection lines. Secure the shut-off valve to prevent it from being switched on unintentionally.

3.0 Drain the filter. Carefully open the drain hole.

4.0 Close the drain hole.

5.0 Unfasten the threaded connector on the cover.

6.0 Lift the cover off the housing.

Figure: Top cover removing

Removing the filter insert with filter candles

1.0 Pull the filter insert, including the flushing arms and the cog wheel, out of the housing towards the rotary axis of the flushing arm shaft.

Figure: Backflushing arm removing

2.0 Allow the filter insert to drip dry in a suitable container.

3.0 Unfasten the screws on the top flushing arm and remove the flushing arm from the flushing arm shaft by pulling it upwards. For secure fastening, use one of the screws (1) as a jacking bolt, whereby you screw it into the free threaded hole and tighten lightly.

4.0 Remove the cover plate after unfastening the screws.

Figure: Back flashing arm

5.0 Carefully push or pull all filter elements out of the filter insert using the filter candle removing tool.

6.0 Place the filter elements in a container of cleaning agent.

7.0 Remove loose particles which float on the top of the cleaning agent during the soaking stage.

8.0 Clean the individual filter elements over the entire length, from the outside to the inside, using a high-pressure cleaner. When using a rotary nozzle for cleaning, the filter elements can be cleaned from the inside to the outside by inserting the cleaning lance into the filter candle and moving it up and down. Always hold the filter elements so that the soiling can run off unhindered.

9.0 Then rinse out the filter elements in fresh cleaning agent.

10.0 Allow the filter elements to dry with one opening pointing downwards or blow the filter elements dry with compressed air.

11.0 Then check all filter elements for damage. Replace any damaged filter elements or seals as necessary.

12.0 Remove any soiling from the other components of the filter element before inserting the filter insert.

Figure: Filter Candle

13.0 Insert the cleaned filter elements into the filter insert from above with the chamfered end first and push the filter elements all the way into the filter insert. Make sure you do not damage the filter elements as you do so.

14.0 Make sure that the seals are properly in place.

15.0 Re-assembly is performed by repeating the steps for disassembly in reverse order.