| Maximum Capacity |
Maximum Allowable Pressure |
Body Material |
Maximum Operating Pressure |
Connection Type |
Connection Size |
Flow Direction |
|
| B2, BI2 | 1,410 lb/hr (640 kg/hr) |
125 psig @ 353°F (8.5 barg @ 178°C) |
ASTM A48 Class 30 Cast Iron |
30 psig (2 bar) |
Screwed | 1/2″ (15 mm) |
Horizontal |
| B3, BI3 | 1,410 lb/hr (640 kg/hr) |
125 psig @ 353°F (8.5 barg @ 178°C) |
ASTM A48 Class 30 Cast Iron |
30 psig (2 bar) |
Screwed | 3/4″ (20 mm) |
Horizontal |
| B4, BI4 | 2,250 lb/hr (1,021 kg/hr) |
175 psig @ 377°F (12 barg @ 191°C) |
ASTM A48 Class 30 Cast Iron |
30 psig (2 bar) |
Screwed | 1″ (25 mm) |
Horizontal |
| B5 | 2,750 lb/hr (1,247 kg/hr) |
175 psig @ 377°F (12 barg @ 191°C) |
ASTM A48 Class 30 Cast Iron |
30 psig (2 bar) |
Screwed | 1-1/4″ (32 mm) |
Horizontal |
| B6 | 4,200 lb/hr (1,905 kg/hr) |
175 psig @ 377°F (12 barg @ 191°C) |
ASTM A48 Class 30 Cast Iron |
30 psig (2 bar) |
Screwed | 1-1/2″ (40 mm) |
Horizontal |
| B8 | 8,900 lb/hr (4,037 kg/hr) |
175 psig @ 377°F (12 barg @ 191°C) |
ASTM A48 Class 30 Cast Iron |
30 psig (2 bar) |
Screwed | 2″ (50 mm) |
Horizontal |
Armstrong B and BI Series Float & Thermostatic steam traps combine high standards of performance and long life with economy. They are ideal for heating service where continuous drainage with high air-venting capacity is required.
Due to the wide use of vacuum returns in systems of this type, the thermostatic air vent element is charged to give it the capability of compensated response to the pressure-temperature curve of steam at any pressure from less than 20″ (500 mm) Hg vacuum to 30 psig (2 bar) gauge. B and BI Series Float & Thermostatic steam traps will vent air slightly below steam temperature throughout this entire range of operation.
All B Series steam traps, except the 1/2″ (15 mm) and 3/4″ (20 mm), have inlet connections on both sides of the body to provide flexibility in piping. The BI Series Float & Thermostatic steam traps in sizes 1/2″ (15 mm), 3/4″ (20 mm) and 1″ (25 mm) feature the convenience of in-line connections with the same internals as the B Series.
