172-65417MA-05 (FS21-L/FS21-H + BD2) 4 Oct 2021
20
BD2 Blowdown Valve Operation
1.
The BD2 valve is in the closed position when the BD2 is shipped from the factory.
Before attempting to operate the BD2, reconfirm that the BD2 valve is still in the
closed position. Locate the blow outlet and, during operation, stand to the side and
well clear of it, as the jet of condensate or steam could cause burns.
2.
Remain in the area the entire time the BD2 valve is in the open position. Before
opening the BD2 valve, grip the BD2 valve seat with a wrench and hold firmly in place
so that it will not rotate when the BD2 valve is loosened. Grip the BD2 valve with
another wrench and slowly loosen. Condensate and steam will discharge from the
blow outlet in a jet stream. Be careful not to loosen the BD2 valve so far that it
becomes removed from the BD2 valve seat. (If the valve stopper pin becomes
damaged, large quantities of steam will be discharged in a jet stream.)
3.
Close the BD2 valve until the flow of fluid completely stops. If the flow of fluid does
not stop, re-open the BD2
valve (as in step “2”) to blow out any scale or dirt that
may be caught in the BD2. Re-tighten the BD2 valve until the flow of fluid stops
completely.
Tightening Torques and Distance Across Flats
Part
Torque
Distance Across
Flats
N·m
(lbf·ft)
mm
(in)
BD2 Valve
30
(22)
17
(
21
/
32
)
BD2 Valve Seat (Screen Holder)
150
(110)
38
(1
1
/
2
)
NOTE: Avoid the use of excessive tightening torques,
as threaded parts may become damaged.
(1 N
m
10 kg
cm)
