Control systems Self-acting controls
4
Materials
1
4 5
3 7
6
1
8 2
12
4
5
15
3 5 7
KA43
4.5 35
8
13
12
2
15
16
No.
Part
Material
KB43 and KC43
1
Body
Steel
EN 10213 GP240 GH+N
DN15 - DN25 Steel
DIN 17243 C22.8
2
Bonnet
DN32 - DN50 Steel
EN 10213 GP240 GH+N
3 4
Valve head
Stainless steel
BS 970 431 S29
Valve seat ring
Stainless steel
BS 970 431 S29
DN15 to DN25 Mild steel
BS 1449 CS 4
Valve seat gasket
5
DN32 to DN50 Reinforced exfoliated graphite
6
Return spring
Stainless steel
BS 2056 302 S 26
KA and KB Brass
BS 2872 CZ 121
7
Stem
KC
Stainless steel
BS 970 321 S20
8
Bonnet gasket
Reinforced exfoliated graphite
Bonnet studs
Steel
BS 4439 Gr. 8.8
12
Bonnet nuts
Steel
BS 3692 Gr. 8
KB
Phosphor bronze
EN 12449 Cu Sn 6
13
Bellows
KC
Stainless steel
AISI 316 L
14 15 16
Bellows gasket (not shown) Reinforced exfoliated graphite
Bonnet bush
Brass
BS 2874 CZ 121
Plunger
Brass
BS 2874 CZ 121
TI-P078-06 CTLS Issue 9
Page 3 of 5
KA43, KB43 and KC43 Steel Self-acting Control Valves
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