10.1 Reassembly of Blowdown Valve
10. Optional Blowdown Valve BD2
Reassembly
• Installation, inspection, maintenance, repairs, disassembly, adjustment and valve
opening/closing should be carried out only by trained maintenance personnel.
CAUTION
• When disassembling or removing the product, wait until the internal
pressure equals atmospheric pressure and the surface of the product
has cooled to room temperature.
1. Clean the trap, BD2 threads, and sealing surfaces, and apply a small amount of anti-seize.
2. Replace gasket.
3. Carefully place the gasket over the threaded portion, and position carefully so that it does not
become off-center.
4. Fasten to the steam trap with the proper torque.
BD2
Coat with
Anti-Seize
Torque (T) and Distance Across Flats (D)
10.2 Operation Instructions for BD2
The BD2 Blowdown Valve uses internal pressure to blow out condensate or steam (and scale/dirt
in the condensate or steam) from inside the unit to atmosphere.
Note: Do not leave the vicinity while the blowdown valve is in the open position.
CAUTION
• Always wear eye protection and heat-resistant gloves when operating the
blowdown valve. Failure to do so may result in burns or other injury.
• When operating the blowdown valve, stand to the side well clear of the
outlet to avoid contact with internal fluids that will be discharged. Failure to do so may result in
burns or other injury.
• Do not use excessive force when opening the blowdown valve. Such force may break the pin
equipped as a valve stopper, causing a blowout from internal pressure resulting in burns or
other injury.
1. With two wrenches, firmly hold the BD2 Valve Seat (Screen Holder)
②
(see table above for
distance across flats) in place while slowly opening the BD2 Valve
①
(17 mm, "). Be
careful to avoid contact with fluid that will be discharged through the hole in the center of the
blowdown valve as the valve opens.
2. Close the BD2 Valve
①
and tighten to a torque of 30 N·m (22 lbf·ft), and confirm that there is
no leakage. If leakage continues, dirt or scale may prevent the valve from sealing. Open and
blow out again, then try to close once more.
3
2
21
/
BD2 Valve
①
Screen Holder Gasket
Discharge Hole
Valve Stopper Pin
BD2 Valve Seat
(Screen Holder)
Screen
②
BD2 Valve
BD2
Valve Seat
(Screen
Holder)
F46
F32
Screwed & Socket Welded
25 mm (1")
All connections and size
s
Screwed & Socket Welded
Flanged 15 - 25 mm ( "-1")
2
1
/
15, 20 mm ( ", ")
2
1
/
4
3
/
②
①
①
②
(T): 30 N
・
m (22 lbf
・
ft)
(D): 17 mm ( ")
32
21
/
(T): 100 N
・
m (73 lbf
・
ft)
(D): 30 mm (1 ")
16
3
/
(T): 60 N
・
m (43 lbf
・
ft)
(D): 22 mm ( ")
8
7
/
(T) : 150 N
・
m (110 lbf
・
ft)
(D) : 38 mm (1 ")
2
1
/
̶ 15 ̶
English
