44
Control systems Self-acting controls
Materials
BX
3 4
BXRA
5
2
2
1
4 3
8
6
4.5 22
1
7
8 6
7
No.
Part
Material
1 2 3 4 5 6 7 8
Body
Gunmetal
CC491 K or CC491 K M
Valve closure member
Stainless steel
AISI 440B
Valve seat ring
Stainless steel
BS 970 431 S29
Valve seat gasket
Copper
BS 2870 C102
Ball return spring
Stainless steel
BS 2056 302 S26
Main return spring
Stainless steel
BS 2056 302 S26
Bonnet
Brass
BS 2872 CZ 122
Bonnet gasket
Reinforced exfoliated graphite
TI-P036-02 CTLS Issue 7
Page 2 of 5
BX and BXRA Gunmetal Self-acting Control Valves
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