Boiler house TDS blowdown controls
2
Weights (approximate) in kg (lbs)
DN15 (½")
DN20 (¾")
DN25 (1")
DN32 (1¼")
DN40 (1½")
DN50 (2")
Size
ASME
PN
125
JIS/KS 10K JIS/KS 20K
19.5 (43)
20 (44)
23 (51)
Electric version
300
40
12 (26)
12.8 (28)
13 (29)
125
JIS/KS 10K JIS/KS 20K
30.5 (67)
31 (68)
34 (75)
Pneumatic version
300
40
Kvs values Valve size
2.4 17
DN15 (½")
DN20 (¾")
DN25 (1")
DN32 (1¼")
DN40 (1½")
DN50 (2")
For conversion: Cv (UK) = Kv x 0.963 Cv (US) = Kv x 1.156
Kvs value
0.5
0.5
0.5
1.6
1.6
1.6
BCV selection guide
DN15, DN20, DN25, DN32, DN40 and DN50 ½", ¾", 1", 1¼", 1½" and 2"
Valve size
DN15
Valve series
BCV
BCV
4 6 7 1 2 3
= = = = = =
Carbon steel Stainless steel SG iron
Body material
4
Screwed Socket weld - Not available for the BCV7_ Flanged
Connections
3
Stem sealing
H = Graphite
H
Seating
W = Stainless Steel 316L with Stellite
W
Type of trim
S = Standard trim
S
Trim-balancing
U = Unbalanced
U S S
Bonnet type
S = Standard S = Standard
Bolting
Flow coefficient
Kvs 0.5
To be specified
Connection type
Flanged ASME 300
To be specified
PN = Pneumatic
230 Vac, 110 Vac or 24 Vac/dc
Actuation
PN
EL = Electrical
Selection example DN15 - BCV 4
- Kvs 0.5 -
3
H W S U S S
Flanged ASME 300 PN
How to order Example: 1 off Spirax Sarco DN15 BCV43 pneumatically actuated control valve having flanged ASME 300 connections.
TI-P403-102 EMM Issue 9
Page 11 of 12
BCV Blowdown Control Valves DN15 to DN50 (½" to 2")
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