Control systems Self-acting controls
4
Materials
2
KX31 Sizes ½" - 1"
6
8
3
4 5 1 7
9 2
8
KX31 Sizes 1¼" - 2"
6
4.5 47
2
8 1
3
4 5
7
8
2
No.
Part
Material
1 2 3 4
Body
Cast iron
DIN 1691 GG25
Bonnet
Cast iron
DIN 1691 GG25
Valve head
Stainless steel
BS 970 431 S29
Valve seat ring
Stainless steel
BS 970 431 S29
DN15 - DN25
Mild steel
BS 1449 CS 4
5
Valve seat gasket
DN32 - DN50
Reinforced exfoliated graphite
6 7 8
Return spring
Stainless steel
BS 2056 302 S 26
Stem
Brass
BS 2874 CZ 121
Bonnet gaskets
Reinforced exfoliated graphite
Bonnet studs
Steel
BS 4439 Gr. 8.8
9
DN32 - DN40
M10
BS 3692 Gr. 8
Bonnet nuts
DN50
M12
BS 3692 Gr. 8
TI-P078-01 CTLS Issue 10
Page 3 of 5
KX31 and KX33 Cast Iron Self-acting Control Valves
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