172-65530MAJ-04 (P46/65 Series + BD2) 6 Oct 2021
17
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)
100
(73)
30
(1
3
/
16
)
NOTE: Avoid the use of excessive tightening torques, as
threaded parts may become damaged.
(1 N
m
10 kg
cm)
