Control valves

Self-acting controls

Kv values

Size

KA43

KB43

-

-

9.80 16.48

KC4

3

-

-

-

16.48

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

Capacities

DN40 DN50

23.70 34.00

23.70 34.00

16.48 34.00

(US) = Kv x 1.156

Spare parts

The spare parts available are shown in solid outline. Parts drawn

in broken line are not supplied as spares.

DN15 DN20 DN25 DN32

2.90

4.64

9.80 16.48

Available spares

KA43

Valve seat assembly

Set of gaskets

Set of bonnet studs and nuts (set of 4)

A, D, E, L

E, L

S

For saturated steam sizing capacities see TI-GCM-08.

For water valve sizing capacities see TI-GCM-09.

Dimensions/weights (approximate) in mm and kg

Valve seat assembly

A, B, C, D, E

(excluding bellows and stem assembly)

L, U, G

Bellows and stem assembly

G, L, N, H

Set of gaskets

B, C, E, L, U, G

Set of bonnet studs and nuts (set of 4)

S

KA43 KB43

KC43

B

B

105

105

105

138

110

152

110

152

110

152

PN25 ASME Table

KB and KC43

How to order spares

PN40

300

Size

A

A

DN15 130

130

DN20 150

150

DN25 160

162

DN32 180

180

DN40 200

202

DN50 230

232

Weight

KB43/

KA43 KC43

130

150

162

180

198

228

14.6 15.0

A

'H'

A

Always order spares by using the description given in the column

headed 'Available spares' and state the size and type of valve.

Example: 1 - Valve seat assembly for a Spirax Sarco DN20 KB43

self-acting control valve.

4.3

6.3

8.0

8.2

8.7

9.1

9.7 10.1

E

D

C

U

A

B

KB43 and KC43

KA43

B

A

X

H

G

N

Installation note:

L

The valve should be fitted in a horizontal line with the actuator

vertically below the pipeline.

How to order

Example: 1 off Spirax Sarco DN20 KA43 self-acting control valve

with steel body having flanged EN 1092 PN40 connections.

S

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions

(IM-S21-01) supplied with the product.

TI-P078-06 CH Issue 6

KA43, KB43 and KC43 Steel Self-acting Control Valves

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