Work principle and classification of the flame damper applied in petrochemical unit together with the factors should be considered in selection were introduced.
2
介绍了阻火器的类型与阻火原理，结合有关国家标准和行业标准论述了选用阻火器的步骤和注意事项。
Types of fire arrestor and work principles are described. Combined with national standards and professional standards, procedures to select fire arrestors and points to be noticed are analyzed.
3
阻火器是应用火焰通过热导体的狭小孔隙时，由于热量损失而熄灭的原理设计制造。
Flame arrester is application by hot conductor, due to the small pore of the heat loss and out of the principle design and manufacture.
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