UK Product Handbook 2026 - Volume 1

44

Control systems Self-acting controls

Gunmetal

Size and pipe connections

Control system options

Body design rating

Maximum  P (bar)

Stroke mm

Valve model

Balanced Kvs

Screwed BSP/NPT

Flanged PN25/ANSI 150

SA121 SA122 SA128

BX2

½" ½" ½" ½" ½" ¾"

PN25

0.38

17.2

2.2

BX3

PN25

0.64

17.2

3.2

BX4

PN25

1.03

17.2

3.2

BX6

PN25

1.65

17.2

3.2

PN25

2.58

17.2

3.2

SB

PN25

3.86

10.3

4.0

1 " 1 "

PN25

6.80

6.8

5.0

PN25

9.80

10.0

5.6

KB51* Balanced by phosphor bronze bellows KC51 Balanced by stainless steel bellows

1 ¼" 1 ½"

PN25

16.48

9.0

8.0

PN25

23.70

8.2

9.0

2 "

PN25

34.00

6.9

9.5

4.5 8

1 ½"

PN25

16.48

16.0

9.0

2 "

PN25

34.00

13.8

9.5

2 ½"

DN65

PN25

65.00

10.0

9.5

NS double sealed valve

3 "

DN80

PN25

94.00

10.0

9.5

Cast iron

Size and pipe connections

Control system options

Body design rating

Maximum  P (bar)

Stroke mm

Valve model

Balanced Kvs

Screwed BSP/NPT

Flanged PN16

SA121 SA122 SA128

BMF2 BMF3 BMF4 BMF6

DN15

PN16

0.38

16.0

2.2

DN15

PN16

0.64

16.0

3.2

DN15

PN16

1.03

16.0

3.2

DN15

PN16

1.65

16.0

3.2

½" ¾"

DN15

PN16

2.90

13.0

3.2

DN20

PN16

4.64

10.3

4.0

KA31 screwed and KA33 flanged

1 "

DN25

PN16

9.80

4.5

5.6

1 ¼" 1 ½"

DN32

PN16

16.48

3.0

8.0

DN40

PN16

23.70

2.0

9.0

2 "

DN50

PN16

34.00

1.5

9.5

1 "

DN25

PN16

9.80

10.3

5.6

KB31* screwed and KB33* flanged balanced by phosphor bronze bellows

1 ¼" 1 ½"

DN32

PN16

16.48

9.0

8.0

DN40

PN16

23.70

8.2

9.0

2 "

DN50

PN16

34.00

6.9

9.5

TI-S21-07 CTLS Issue 6

Page 8 of 13

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

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