Control systems Pressure reducing/surplussing valves
4
Materials (continued)
DN32 to DN50
30
29
28
4.6 41
25
26 27
28 31
32
DN25
No.
Part
Material
DN32 to DN50
Steel zinc plated
BS 970 230 M07
25
Lock-nut
DN15 to DN25, DN65 to DN100 Steel zinc plated
BS 3692 Gr. 8
26 27 28 29 30 31 32
Spring plate
Steel zinc plated
BS 1449 Pt1 HR14
Needle bearing
Steel
Setting nut
Steel zinc plated Steel zinc plated Steel zinc plated Steel zinc plated
BS 970 230 M07
Bearing plate
DN32 to DN50 DN32 to DN50
BS 1449 Pt1 HR14
Circlip
Mounting plate
BS 1449 Pt1 HR14
Housing
Types 1(N) to 4(N)
Steel
DIN 1514 St W24
Materials continued on next page
TI-P203-01 CTLS Issue 20
Page 7 of 15
DRV4 and DRV4G Cast Steel Pressure Reducing Valves
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