UK Product Handbook 2026 - Volume 1

44

Control systems Self-acting controls

Pressure/temperature limits

Kv values Size

¾"

1"

1½"

Cast iron valves - flanged PN16

Kv

4.64

8.96

20.29

Size

DN50

DN80

DN100

Kv

41.20

97.85

118.45

For conversion: Cv (UK) = Kv x 0.963 Cv (US) = Kv x 1.156

Pressure bar g

The product must not be used in this region.

Stroke mm Size

¾"

1"

1½"

Bronze valves - screwed

Stroke

2.7

4.3

5.9

Size

DN50

DN80

DN100

Stroke

7.7

12.4

13.9

4.5 66

Sizing See TI-GCM-09.

Pressure bar g

Cast iron

PN16

Body design conditions

Bronze

PN25

Cast iron

16 bar g @ 120 °C

Maximum design pressure

Bronze

25 bar g @ 120 °C

Cast iron

200 °C @ 13.5 bar g

Maximum design temperature

Bronze

200 °C @ 21.0 bar g

Cast iron

-10 °C

Minimum design temperature

Bronze

-90 °C

Maximum operating temperature

Cast iron

200 °C @ 13.5 bar g

Bronze

200 °C @ 21.0 bar g

Cast iron

-10 °C

Minimum operating temperature

Bronze

-20 °C

Note: For lower operating temperatures consult Spirax Sarco Maximum differential pressure ¾ ", 1" and 1 ½ " DN50, DN80 and DN100

3.4 bar

2.7 bar

Designed for a maximum cold hydraulic test pressure of:

Cast iron

24 bar g

Bronze

37.5 bar g

Leakage rate

1% of full Kv (see overleaf for Kv values)

TI-P047-01 CTLS Issue 14

Page 2 of 5

TW Three-port Self-acting Control Valve for Liquid Systems

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