UK Product Handbook 2026 - Volume 1

44

Control systems Self-acting controls

Dimensions/weights (approximate) in mm (inches) and kg (lb)

A

C

B

4.5 42

KB51 and KC51 shown

KB51

KC51

Weight

Size

A

B

B

C

KB51

KC51

136 (5.35) 144 (5.67) 150 (5.91) 180 (7.09)

138 (5.43) 152 (5.98)

4.17 (9.19) 7.00 (15.4) 8.32 (18.1) 10.30 (22.1)

1"

51 (2.01)

1¼"

152 (5.98) 189 (7.44)

62 (2.44) 71 (2.80)

8.32 (18.1) 10.60 (23.4)

1½"

152 (5.98)

2"

Safety information, installation and maintenance For full details see the Installation and Maintenance instructions supplied with the product. Installation note: The valve should be fitted in a horizontal line with the actuator vertically below the pipeline.

How to order Example: 1 off Spirax Sarco 1 ¼ " screwed BSP KB51 self-acting control valve with bronze body.

TI-P078-04 CTLS Issue 10

Page 4 of 5

KB51 and KC51 Bronze Self-Acting Control Valves

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