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原文：
  高层及其它各类现代建筑大都设有通风、空调及防排烟系统，一旦发生火灾，这些系统中的管道将成为火焰、烟气蔓延的通道。为了阻止火势通过风管蔓延扩大，在《建筑设计防火规范》GBJ16-87和《高层民用建筑设计防火规范》GB50045-95中均明确规定了防火阀、排烟阀的设置要求。 防火阀用在通风、空调系统的送、回风管路上，平时呈开启状态，当火灾一旦发生，管道内气体温度达到70℃时即自行关闭，并在一定时间内能满足耐火稳定性和耐火完整性要求，起隔烟阻火作用。排烟阀用在排烟系统管道上或排烟风机的吸入口处，平时呈关闭状态，当火灾发生时，通过火灾报警信号手动或自动开启阀门，根据系统功能配合排烟，当管道内烟气温度达到280℃时自动关闭，并能在一定时间内满足耐火稳定性和耐火完整性要求，起隔烟阻火作用。

“ Exhaust valves and fire dampers main purpose”是由中国旋塞阀网提供的国际阀门新闻，译文仅供参考。另外，中国旋塞阀网还提供相关产品搜索： 二通旋塞阀、 三通旋塞阀、 油密封旋塞阀、 更多旋塞阀产品、 旋塞阀价格、等。

译文：
Exhaust valves and fire dampers main purpose And other types of modern high-rise buildings with most of the ventilation, air conditioning and smoke control systems, in the event of fire, these systems will become the pipeline fire, smoke spread channel. In order to prevent the fire from spreading through the duct to expand, in the "building design for fire protection" GBJ16-87 and "fire protection design of tall buildings" GB50045-95 are clearly defined in the damper, exhaust valve setup requirements. Dampers used in ventilation and air conditioning systems to send, return air duct on the road, usually was open, when a fire occurs, the gas pipeline that is when the temperature reaches 70 ℃ itself off, and within a certain time to meet the fire-resistant stability and fire integrity requirements, smoke from the fire retardant effect. Exhaust valve in the exhaust system or exhaust pipe on the suction fan at the entrance, usually showing off, when a fire occurs, fire alarm signals by opening the valve manually or automatically, according to the system functions with the smoke, when the pipe flue gas temperature reaches 280 ℃ automatically shut down, and can fire at a certain time to meet the stability and fire integrity requirements, smoke from the fire retardant effect.

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原文来源：http://www.1xuansaifa.com/

2011-12-27 07:03

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