UK Product Handbook 2026 - Volume 1

Control systems Self-acting controls

4

Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2020

TI-P047-01 CTLS Issue 13

Description The TW valve is a 3-port self-acting control valve for liquid systems (including sea water) and can be used for mixing or diverting applications. It is used in conjunction with a Spirax Sarco SA control system to provide a self-acting temperature control unit. Available types TW Three-port Self-acting Control Valve for Liquid Systems

¾ ", 1" and 1 ½ "

Screwed

Bronze valves

Flanged

DN50

Cast iron valves

Flanged

DN50, DN80 and DN100

4.5 65

Sizes and pipe connections Bronze valves

¾ ", 1" and 1 ½ " screwed BSP (BS 21 parallel) or NPT. DN50 standard flange EN 1092 PN25 which also meets the face-to-face dimensions of PN16 and PN10. DN50, DN80 and DN100 standard flange EN 1092 PN16 which also meets the face-to-face dimensions of PN10.

Cast iron valves

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