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![](https://beteccad.com/wp-content/uploads/2021/04/msfd-20-all-c1-1-450x450.jpg)
MSFD-GB-21C1-A-R
Galvanized construction, 1.5-hour, Class 1 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/remaning-all-450x450.jpg)
MSFD-GB-21C2-A-R
Galvanized construction, 1.5-hour, Class 2 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm, operating temperature 250° C up to 2 hours
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![](https://beteccad.com/wp-content/uploads/2021/04/remaning-all-450x450.jpg)
MSFD-GB-21C2-A-R
Galvanized construction, 1.5-hour, Class 2 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/remaning-all-450x450.jpg)
MSFD-GB-21C3-A-R
Galvanized construction, 1.5-hour, Class 3 leakage at 350° F, 3V single skin blade, 4 in. wg, 2000 fpm, operating temperature 250° C up to 2 hours
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![](https://beteccad.com/wp-content/uploads/2021/04/gb-21-c-3-450x450.jpg)
MSFD-GB-21C3-A-R
Galvanized construction, 1.5-hour, Class 3 leakage at 350° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/b-31-c1-all-450x450.jpg)
MSFD-GB-31C1-A-R
Galvanized construction, 3-hour, Class 1 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/b-31-c1-all-450x450.jpg)
MSFD-GB-31C1-A-R
Galvanized construction, 3-hour, Class 1 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm, operating temperature 250° C up to 2 hours
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![](https://beteccad.com/wp-content/uploads/2021/04/b-31-c1-all-450x450.jpg)
MSFD-GB-31C2-A-R
Galvanized construction, 3-hour, Class 2 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/b-31-c1-all-450x450.jpg)
MSFD-GB-31C2-A-R
Galvanized construction, 3-hour, Class 2 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm, operating temperature 250° C up to 2 hours
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![](https://beteccad.com/wp-content/uploads/2021/04/31-c-3-450x450.jpg)
MSFD-GB-31C3-A-R
Galvanized construction, 3-hour, Class 3 leakage at 350° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/07/31-c-3-450x450.jpg)
MSFD-GB-31C3-A-R
Galvanized construction, 3-hour, Class 3 leakage at 350° F, 3V single skin blade, 4 in. wg, 2000 fpm, operating temperature 250° C up to 2 hours
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![](https://beteccad.com/wp-content/uploads/2021/04/30-c2-450x450.jpg)
MSFD-GB-F-30C2-A-R
Galvanized construction, melting fuse, 3-hour, Class 2 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/b20-gbd-c2-1-scaled.jpg)
MSFD-GBD-20C2-A-R
Galvanized construction, 1.5-hour, Class 2 leakage at 250° F, Aerofoil blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/msfd-20-all-c1-1-450x450.jpg)
MSFD-GSB-20C1-A-R
Galvanized construction, 1.5-hour, Class 1 leakage at 250° F, 3V stainless steel single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/20-c2-scaled.jpg)
MSFD-GSB-20C2-A-R
Galvanized construction, 1.5-hour, Class 2 leakage at 250° F, 3V stainless steel single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/msfd-30-all-c1-450x450.jpg)
MSFD-GSB-30C1-A-R
Galvanized construction, 3-hour, Class 1 leakage at 250° F, 3V stainless steel single skin blade, 4 in. wg, 2000 fpm
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