Shenyang ventilation pipeline The muffler device in the project construction shall conform to the following rules

(1) The muffler frame must be firm, the size of the diaphragm of the resonance chamber is close and correct, and the shell at the junction of the diaphragm and the wall plate is tight without leakage.

(2) The direction of silencer device must be correct, and a separate support (hanger) shall be set.

(3) The fixed end of the silencing plate must be firm after it is installed separately, and the distance between pieces must be uniform.

(4) The anechoic sheet data shall be firmly bonded and flat, and the scattered data shall be evenly filled without obvious subsidence.

(5) The silencing duplex data are spliced along the air flow direction without damage; Perforated plates shall be free of burrs, and the hole spacing shall be placed evenly.

The closed valve device shall conform to the following rules

(1) The device shall be checked before installation, and its sealing performance shall meet the product skill requirements.

(2) When installing, the direction of the arrow mark on the valve is consistent with the direction of the shock wave.

(3) The orientation of the switch indicator light shall be the same as the actual opening and closing orientation of the valve plate, and the operating orientation of the opening and closing handle shall be accurate.

（4） Ventilation engineering Construction valves shall be fixed with hooks or supports.

The pressure measuring device shall conform to the following rules

(1) The piezometric pipe shall be connected by welding, and shall be fully welded without air leakage.

(2) Pipeline valves shall be closely connected with fittings.

(3) The measuring pressure plate shall be subject to anti-corrosion treatment and fixed with expansion screws.

(4) Pressure measuring instruments shall be placed horizontally.

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