Smoke fire protection setting and application of pneumatic valve in the system

. On the main entrance of smoke exhaust fan should be set when the flue gas temperature exceeds ℃ can automatically close the pneumatic valve, smoke fire and should be with exhaust fan chain, when the smoke fire pneumatic valve closing, fan to stop running. Smoke extraction fan min should guarantee the continuous ℃ during work. To be sure, smoke fire pneumatic valve installed in the exhaust fan before and after, flexible according to the specific circumstances to determine. In the basement exhaust system, for example:
( When is only a layer of basement, and smoke exhaust by the vertical duct to the outdoor, smoke fire pneumatic valve should be set up on the exhaust fan inlet manifold.
　　( When the basement layer on the second floor and second floor above, when sharing a smoke exhaust shaft of each layer, each layer of smoke fire pneumatic valve should be set on the exhaust fan outlet manifold, which abuts set exhaust shaft side.
　　. Both vertical layout of footpath exhaust system and exhaust system, horizontal layout room shall be YanZhi removal pipe with vertical duct joint set ℃ when smoke fire pneumatic valve can automatically shut down.
smoke fire pneumatic valve set normally open or normally closed, the room exhaust system, when the burden of a fireproof partition of exhaust pipeline with multiple partition of the smoke, smoke prevention should be set on the main fire partition normally open the pneumatic valve, smoke fire and the smoke partition normally closed exhaust port is set on branch or exhaust gas dynamic valve; For aisle exhaust system, it can be reference to related provisions in the next article.
　　. Transverse mechanical smoke exhaust system should be in accordance with the fire zone Settings, each layer of horizontal duct should not pass through the fire partition, but some engineering some floor area is larger, the fire zone set exhaust system with difficulty, must travel, should be set in the crossing ℃ when smoke fire pneumatic valve can automatically shut down.
smoke fire pneumatic valve set normally open or normally closed, depending on the exhaust mouth in the form of.
　　( When the set normally closed smoke, row YanZhi pipe set normally open smoke fire prevention pneumatic valve;
　　( When the general normally open type tuyere row YanZhi pipe pneumatic valve normally closed smoke fire prevention;
　　( When a normally closed type special fire smoke, the platoon YanZhi without smoke fire pneumatic valve on the pipe.
　　. Set the mechanical smoke extraction in the basement of should be considered in wind facilities, when the mechanical ventilation system, should be set up on the fan inlet pipe ℃ fusing fire pneumatic valve.
　　. For mechanical pressurized air supply system, can be set up on the pressure blower inlet pipe ℃ fusing fire pneumatic valve, in order to prevent the air inlet, threatened by the fire and the smoke flue gas transfer onto the floor.