UK Product Handbook 2026 - Volume 1

Control systems Self-acting controls

4

Cast carbon steel

Size and pipe connections

Control system options

Body design rating

Maximum  P (bar)

Stroke mm

Balanced Kvs

Valve model

Flanged

SA121 SA122 SA128

PN25

PN40 ANSI 300

BM2 BM3 BM4 BM6

DN15

DN15

PN25

0.32

17.2

2.2

DN15

DN15

PN40

0.64

17.2

3.2

DN15

DN15

PN40

1.03

17.2

3.2

DN15

DN15

PN40

1.65

17.2

3.2

DN15

DN15

PN40

2.90

17.0

3.2

DN20

DN20

PN40

4.64

10.0

4.0

DN25

DN25

PN40

9.80

4.5

5.6

KA43

DN32

DN32

PN40

16.48

3.0

8.0

DN40

DN40

PN40

23.70

2.0

9.0

DN50

DN50

PN40

34.00

1.5

9.5

DN25

DN25

PN40

9.80

10.0

5.6

4.5 9

KB43* Balanced by phosphor bronze bellows

DN32

DN32

PN40

16.48

9.0

8.0

DN40

DN40

PN40

23.70

8.2

9.0

DN50

DN50

PN40

34.00

6.9

9.5

DN32

DN32

PN40

16.48

16.0

8.0

KC43 Balanced by stainless steel bellows

DN40

DN40

PN40

16.48

16.0

9.0

DN50

DN50

PN40

34.00

13.8

9.5

TI-S21-07 CTLS Issue 6

Page 9 of 13

2-Port Self-acting Temperature Control Valve Selection for Heating and Cooling Applications

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