Product Details
Size | Fixed Disc Assembly No. | Swing Discs Assembly No. | Weight | Type of Inlet | Material |
---|---|---|---|---|---|
3" | BF503MSB | BF503MSB | 15.1 | Flanged | Steel |
3" | BF603MSB | BF603MSB | 14.9 | Grooved | Steel |
3" | BF503ALB | BF503ALB | 11.5 | Flanged | Aluminum |
3" | BF603ALB | BF603ALB | 11.3 | Grooved | Aluminum |
4" | BF504MSB | BF504MSB | 26.0 | Flanged | Steel |
4" | BF604MSB | BF604MSB | 24.9 | Grooved | Steel |
4" | BF504ALB | BF504ALB | 16.0 | Flanged | Aluminum |
4" | BF604ALB | BF604ALB | 15.8 | Grooved | Aluminum |
![]() Manifold style valves shall not be used where compliance with NFPA385 2-7 is required. |
|||||
NOTES: 1. Standard valves have buna-N disc, cork/buna-N gasket and non-asbestos packing. 2. See section 5, page 4A for replacement parts. 3. See section 5, page 5B for part numbers and dimensions of available end drains, crossovers, etc. |

Dimensions
Size & Material | A | B | C | D | E | F | G | H |
---|---|---|---|---|---|---|---|---|
3" Steel | 3 1/8 | 12 1/2 | 5 3/4 | 11 5/16 | 5 13/16 | 9 1/8 | 10 7/16 | 8 |
3" Aluminum | 3 1/8 | 12 1/2 | 5 7/8 | 11 5/16 | 5 13/16 | 9 1/8 | 10 5/16 | 8 1/4 |
4" Steel | 3 3/4 | 15 | 6 3/4 | 12 | 6 5/16 | 11 | 12 1/4 | 8 |
4" Aluminum | 3 3/4 | 15 | 6 7/8 | 12 | 6 5/16 | 11 1/16 | 12 5/16 | 8 |
Size & Material | Flanged Inlet I.D. | Flanged Inlet O.D. | Flanged Inlet B.C. | Holes | Groove Inlet Pipe Size |
---|---|---|---|---|---|
3" Steel | 3 3/8 | 5 5/8 | 4 7/8 | 8- 7/16 | 3" |
3" Aluminum | 3 3/8 | 5 5/8 | 4 7/8 | 8- 7/16 | 3" |
4" Steel | 4 3/8 | 6 5/8 | 5 7/8 | 8- 7/16 | 4" |
4" Aluminum | 4 3/8 | 6 5/8 | 5 7/8 | 8- 7/16 | 4" |
NOTE: 3" Manifolds have 4" By-Pass flanges for mounting API Adapters. |