Control systems Self-acting controls
4
Materials
2 6 9
10 1 8 11
3 5 4
7
4.5 53
2 8
No.
Part
Material
1 2 3 4
Body
Bronze
CC491 KM
Bonnet
Bronze
CC491 KM
Valve head
Stainless steel
BS 970 431 S 29
Valve seat ring
Stainless steel
BS 970 431 S 29
1"
Mild steel
BS 1449 CS 4
5
Valve seat gasket
1¼ - 2"
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
1¼ and 1½" M10 x 35 mm (1.38")
BS 3692 Gr. 8
Bonnet nuts
2"
M12 x 35 mm (1.38")
BS 3692 Gr. 8
10
Bellows
Phosphor bronze
EN 12449 Cu Sn 6
11
Bellows gasket
Reinforced exfoliated graphite
TI-P078-03 CTLS Issue 13
Page 3 of 5
KY51 Bronze Self-acting Control Valves
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