Shenyang Ventilation Engineering Muffler installation during construction shall meet the following requirements

(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 and leak free.

(2) The muffler must be installed in the correct direction, and a separate support (hanger) shall be set.

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

(4) The anechoic sheet material is firmly and smoothly bonded, and the bulk material is evenly filled without obvious subsidence.

(5) The silencing compound material is spliced along the air flow direction without damage; The perforated plate shall be free of burrs and the hole spacing shall be evenly arranged.

The installation of closed valves shall meet the following requirements

(1) Inspection shall be carried out before installation, and its sealing performance shall meet the technical requirements of the product.

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

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

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

The installation of pressure measuring device shall meet the following requirements

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

(2) The pipeline valves and fittings shall be tightly connected.

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

(4) The pressure measuring instrument shall be placed horizontally.

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