HY-FYD-S Handle type butterfly round air damper
1. Single plate structure without flange. Handle type.
2. According to old standard, the length of damper body is 150mm.
3. The size of this structure should not be too large.
HY-FYD-L Chain type butterfly round air damper
1. Single plate structure without flange and handle. It is switched on and off by pull rod and chain.
2. According to old standard, the length of damper body is 150mm.
3. The size of this structure should not be too large.
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