Control systems Pressure reducing/surplussing valves
4
Materials (continued)
11 12
9
14 13
10 (DN25 to DN100)
DN15 and DN20
DN65 to DN100
4.6 39
8
DN25
12
11
No.
Part Bush
Material
8 9
DN15 and DN20 DN25 to DN100 DN25 to DN100 DN25 to DN100
Stainless steel Stainless steel Stainless steel
BS 970 431 S29 BS 970 431 S29
Bush (part of item 10)
10 11 12 13
Balancing bellows assembly
AISI 316 (L)
Balancing bellows gasket
Reinforced exfoiliated graphite Reinforced exfoiliated graphite
Bonnet gasket
Bonnet nuts
Steel
DIN 267 Pt13 Gr. 8
DN15 to DN40
M10 M12 M16
14
Bonnet studs
DN50 and DN65 DN80 and DN100
Steel
DIN 267 Pt13 Gr. 8.8
Materials continued on next page
TI-P203-01 CTLS Issue 20
Page 5 of 15
DRV4 and DRV4G Cast Steel Pressure Reducing Valves
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