Fire door auto drop seal

Product features:

Product Advantage;

1)  Soft and hard co-extrusion adhesive strip

2)  Heavy duty plunger can be automatically locked after adjustment, not easy to loose, durable and stable sealing effect.

3)  Internal case can draw out as a whole, convenient to install and maintenance.

4)  Optional for brackets installation or top installation.

5)  The top installation is convenient and diversified,  extract the whole lifting mechanism to install, or only extract sealing strip to install.

6)  Internal four-bar linkage mechanism, flexible movement, stable structure, stronger anti – wind pressure.