4.5.7
KB33 (DN32 - DN50 flanged)*
KB43 (DN32 - DN50 flanged)*
KC43 (DN32 - DN50 flanged)
KC63 (DN32 - DN50 flanged)
Control valves
Self-acting controls
Table 5 Normally open valves for heating applications
For pressure temperature relationships please refer to the pressure / temperature charts in Table 4, page 5.
* Please note: The KB31, KB33, KB43, and KB51 control valves can also be used on water applications where high P conditions exist.
SB (DN15 - DN25 screwed)
Valve selection data
NS (DN65 - DN80 flanged)
NS (DN65 - DN80 screwed)
KB31 (DN32 -
KB51 (DN32 -
KC31 (DN40 -
KC51 (DN40 -
Maximum
P (bar)
17.2
17.2
17.2
17.2
17.2
10.3
6.8
4.5
3.0
2.0
1.5
10.0
9.0
8.2
6.9
16.0
13.8
10.0
10.0
Gunmetal
Valve model
Size and pipe connections
Screwed
Flanged
Body design
BSP/NPT PN25/ANSI 150
rating
Control system options
BX2
1⁄2"
BX3
1⁄2"
BX4
1⁄2"
BX6
1⁄2"
1⁄2"
SB
3⁄4"
1"
PN25
PN25
PN25
PN25
PN25
PN25
PN25
PN25
PN25
PN25
PN25
PN25
PN25
PN25
PN25
PN25
PN25
DN65
PN25
DN80
PN25
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
KA51
KB51*
1"
11⁄4"
11⁄2"
2"
1"
11⁄4"
•
•
•
•
•
•
Balanced by
phosphor
11⁄2"
bronze bellows
KC51
Balanced by
stainless steel
bellows
2"
11⁄2"
2"
NS double
21⁄2"
sealed valve
3"
KA31 (DN15 - DN25 screwed)
KA33 (DN15 - DN25 flanged)
KA51 (DN25 screwed)
KA61 (DN15 - DN50 flanged)
KA31 (DN32 - DN50 screwed)
KA33 (DN32 - DN50 flanged)
KA43 (DN15 - DN50 flanged)
KA51 (DN32 - DN50 screwed)
KA63 (DN15 - DN50 flanged)
BM (DN15 flanged)
BMF (DN15 flanged)
BX (DN15 screwed)
KB31 (DN25 screwed)*
KB33 (DN25 flanged)
KB51 (DN25 screwed)*
DN50 screwed)*
DN50 screwed)*
DN50 screwed)
DN50 screwed)
Page 6 of 12
S
A
1
2
1
S
A
1
2
2
S
A
1
2
3
S
A
1
2
8
S
A
4
2
2
S
A
4
2
3
Balanced
Kvs
0.38
0.64
1.03
1.65
2.58
3.86
6.80
9.80
16.48
23.70
34.00
9.80
16.48
23.70
34.00
16.48
34.00
65.00
94.00
Stroke
mm
2.2
3.2
3.2
3.2
3.2
4.0
5.0
5.6
8.0
9.0
9.5
5.6
8.0
9.0
9.5
9.0
9.5
9.5
9.5
2-Port Self-acting Temperature Control Valve Selection
for Heating and Cooling Applications
TI-S21-07 CH Issue 1
Page 6 of 12
