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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。

“The main purpose of the exhaust valves, fire dampers”是由中国针型阀网提供的国际阀门新闻，译文仅供参考。另外，中国针型阀网还提供相关产品搜索： 仪表阀组、 仪表球阀(气动管路球阀)、 仪表截止阀(气动管路截止阀)、 更多针型阀产品、 针型阀价格等。

译文：
The main purpose of the exhaust valves, fire dampers Mostly high-level and other types of modern architecture with a ventilating, air conditioning and smoke control system in the event of fire, these systems in the pipeline will become a flame, flue gas spread of the channel. In order to prevent the fire spread through the air tube to expand, building design and fire safety regulations GBJ16-87 and of tall buildings for fire protection design specification "GB50045-95 are clearly defined fire dampers, exhaust valve settings. Fire dampers used in ventilation and air conditioning system to send back the way duct usually was turned on when the case of fire, the gas pipeline temperature reach 70 ° C, to turn itself off, and within a certain time to meet the fire resistance stability and fire integrity requirements, from the role of the fire. Exhaust valves used in the exhaust system pipe or suction at the entrance of the exhaust fan, usually was turned off, open the valve, manual or automatic fire alarm signal when the fire broke out, according to the system functions with the smoke, when the pipeline automatically close the flue gas temperature reaches 280 ° C, and within a certain time to meet fire-resistant stability and fire integrity requirements, from the role of the fire.

更多新闻：

• 防火阀的选用要点
• 针型阀门驱动装置
• 阀门按用途和作用分类

原文来源：
http://www.1zhenxingfa.com/

2012-02-03 08:23

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