ARRANGEMENT FOR CLEANING FILTER APPARATUS OF ROCK DRILLING RIG

摘要

The invention relates to a method for cleaning a filter apparatus of a rock drilling rig, a filter apparatus and a rock drilling rig The filter apparatus (12) comprises several filter units (19), and the filters (20) therein separate solid matter (21) from the filtering flow The filter apparatus comprises a cleaning apparatus (23) with a pressure channel (24) enabling to provide the filter unit (19a) to be cleaned with a pressure pulse The cleaning apparatus (23) also comprises mechanical sealing means (26) for preventing the filtering flow through the filter unit (19a) to be cleaned during cleaning.