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1. Tank connection locations may vary depending on the type of tank to be installed.
2. Provide an anti-thermosyphon loop with a minimum drop of 12" to prevent gravity heating of the tank.
3. Figures 1 and 2 show where a tee would be located if multiple expansion tanks are installed.
B & G
Model 107A
High Capacity
Air Vent
From
Boiler
or HX
B & G Rolairtrol
Air Separator
Tank Purge
Valve
Pre-Charging
Air Connection
B & G Pressured
Expansion
Tank
(Series B or
Series D-Vertical)
Figure 1
Vertical Tank Installation with Rolairtrol Air Separator
B & G Model 107 A
High Capcity Air Vent
B & G Pressure
Reducing Valve
with Check
Cold
Water Fill
From Boiler
or Heat
Exchanger
B & G Model 107 A
High Capcity
Air Vent
B & G
Relief Valve
B & G Pressure Reducing Valve
with Check
Cold
Water
Fill
Drain
Pipe
From System
Figure 3 - Typical Piping with IAF In-Line
Air Separator and Airtrol Boiler Fitting
4
B & G Pressure Reducing Valve
with Check
Cold
Water
Fill
B & G Triple Duty Valve
To System
B & G #7
Pressure
or #87
Gage
Air Vent
B & G
Suction
B & G System Pump
Diffuser
Lock-Shield
Valve
See Table A for
Pipe Sizing
Drain
Valve
B & G
Relief Valve
Manual
When Required
Vent
IAF 2" to IAF 4"
Manual
Vent
B & G
Airtrol
Boiler
Fitting
Tank or
Boiler
Typical Piping
with Airtrol Boiler Fitting
FIGURE NOTES
B & G
Model 107A
High Capacity
Air Vent
From
Boiler
or HX
B & G
Rolairtrol
Air
Separator
Figure 2
Horizontal Tank Installation with Rolairtrol Air Separator
Fitting
Size, in.
1
1, 1 /
2
1 / , 2
1
2
1 B & G Model 107 A
2 / , 3
1
2
B & G Pressure
Reducing Valve
with Check Air
Cold
Water
Fill
Follow
Figure 1 or 2
for Tank and
B & G
Pump Piping
Relief Valve
Drain
Pipe
From System
Figure 4 - Tank Installation with IAS
B & G Pressurized Tank (Series D)
Tanks May be Floor Mounted
with BLZ Leg Assemblies
See Fig. 1 for Series B Tank Mounting
B & G #7 or #87
Air Vent
B & G Pressure
Reducing Valve
Pressure
with Check
Gage
Cold
3
1
Water
Fill
Tank Purge
Valve
See Table A for Pipe Size
2
Lock-Shield
Valve
Drain
B & G Suction
Valve
Diffuser
No. of Vents
Recommended
B & G Pressurized Tank (Series D)
Tanks May br Floor Mounted
1
with BLZ Leg Assemblies
See Fig. 1 for Series B Tank Mounting
2
B & G #7 or #87
Air Vent
1
B & G #7 or #87
Pressure
Air Vents
Gage
See Table
Above
Tank
Purge Valve
See Table A
on Page 5
Eliminator
For Pipe Size
Fitting
Lock-Shield
Valve
2
Dirt Leg
8" Long Minimum
Drain
Valve
Boiler
In-Line Air Separator
Pre-Charging Air
Connection
1
B & G Triple Duty Valve
To System
B & G
System
Pump
Pre-Charging Air
Connection
1
B & G Flo-Control Valve
or Triple Duty Valve
To System
B & G System Pump
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