Boiler house TDS blowdown controls
2
Dimensions/weight (approximate) in mm (ins) and kg (Ibs) A B C
D
E
Weight
40 (1.57)
110 (4.33)
74.5 (2.93)
94.5 (3.72)
73 (2.87)
0.75 (1.65)
E
A
D
B
½ " BSP/NPT
½ " BSP/NPT
2.4 4
C
Capacities Model
BCV1
BCV20
For conversion: C v (UK) = K v x 0.963 C v (US) = K v x 1.156
Orifice size
6 mm ( ¼ ")
3 mm ( 1/8 ")
Kv value
0.25
0.8
Boiler pressure
Capacities
When used for boiler blowdown purposes, the valve will be controlling a mixture of water and flash steam, so the following capacity table applies:
BCV1
BCV20
bar g
psi g
kg / h
lb / h
kg / h
lb / h
1 2 4 6 8
14.5
175
385
560
1 232
29 58
250
550
790
1 738
350
770
1 120
2 464
87
385
847
116
445
979
10
145
495
1 089
14
203
590
1 298
Head across valve
Capacities
When the BCV20 valve is used as part of the BCS2 blowdown control system, downstream of a steam trap, the following capacity table applies:
Cold water
Hot water with flash steam
m
ft
kg / h
lb / h
kg / h
lb / h
1 2 3 5
3 6 9
253
557
63
138
358
787
90
198
438
963
110
242
15
566
1 245
142
312
10
30
800
1 760
200
440
TI-P403-60 EMM Issue 6
Page 2 of 3
BCV1 and BCV20 Blowdown Valves
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