Smoke proof valve
Release：Zhengyang air conditioning | Time：2018/8/20 15:05:03
Performance:
1. Normally open state, when the temperature of the valve reaches 70 degrees Celsius, easy to fuse, the valve closed under partial gravity or spring force, cut off the spread of smoke.
2. rectangular valve L=250mm, round valve L= +50mm.
3. full resistance coefficient L is less than 0.5.
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