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Figure 25a Purpose of Tappings - Steam Boilers
Size Size
(in) (in)
B 4
Plug (24-03 thru 24-06)
Supply (24-07 thru 24-12)
K
Steam Boiler
A 4 Supply
Tapping
Location
Steam Boiler
Tapping
Location
C
3 Blow-Off Valve
D 3 Return
E 3 Plug
J1 1
F 3 Plug
G 1-1/2 Safety Valve/Surface Skim Tap
Plug
J2 1 Float L.W.C.O.
3/4 Plug
M 3/4 Operating Pressure Limit Control
N 3/4
Hi Pressure
Limit Control/Manual Reset
P 1/2 Gauge Glass/#67 L.W.C.O.
Q 1/2 Steam Gauge (Bush to 1/4")
S 3/4 Tankless Heater Control
T 3/4 Firing Rate Pressure Control