2.33. Check of fastening of the case of a butterfly valve
The tightening of this connection is necessary in case of violation of tightness and an air podsasyvaniye (through a hose in length about 60 cm about the basis of the case are listened hissing). Remove the air filter, previously having designated and having disconnected hoses, and tighten nuts and bolts of the case of a butterfly valve with the set moment. If pulling up does not give results, remove the case of a zaslonka and replace laying (Hl. 4). Establish the filter and attach hoses.