2.33. Check of fastening of the case of a butterfly valve

Tightening of this connection is necessary in case of violation of tightness and a podsasyvaniye of air (through a hose about 60 cm long about the basis of the case hissing is listened). 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 yield results, then remove the case of the gate and replace laying (Hl. 4). Install the filter and attach hoses.