44
Control systems Self-acting controls
Materials
1
3
3
4 2
8
6
BM and BMF
7
4.5 16
1
5
4
3
2
8
6
BMRA and BMFRA
7
No.
Part
Material
BMF
Cast iron
DIN 1691 GG 20
1
Body
BM
Cast steel
DIN 17245 GS C25
2 3 4 5 6 7 8
Valve closure member
Stainless steel
AISI 440 B
Valve seat ring
Stainless steel
BS 970 431 S29
Valve seat gasket
Mild steel
BS 1449 CS4
Ball return spring
Stainless steel
BS 2056 302 S26
Main return spring
Stainless steel
BS 2056 302 S26
Bonnet
Steel
DIN 17243 C22.8
Bonnet gasket
Reinforced exfoliated graphite
TI-P036-01 CTLS Issue 7
Page 2 of 6
BM, BMRA, BMF and BMFRA Self-acting Control Valves
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