44
Control systems Pressure reducing/surplussing valves
Materials (continued)
4.6 42
35
33 34
DN25
36
37
No.
Part
Material
Type 5(N)
Steel
BS EN 10025 S355 J2G3
Types 1(N)
Steel zinc plated
BS 3692 Gr. 5.6
33
Housing screws
Types 2(N), 3(N), 4(N) and 5(N) Steel zinc plated
BS 3692 Gr. 8.8
Types 1(N)
Steel zinc plated
BS 3692 Gr. 5
34
Housing nuts
Types 2(N), 3(N), 4(N) and 5(N) Steel zinc plated
BS 3692 Gr. 8
Diaphragm
EPDM fabric reinforced Nitrile fabric reinforced
35
Diaphragm suffix 'N'
36 37
Hex. headed bolt
Stainless steel
BS 6105 A2
Sealing washer
Fibre
Materials continued on next page
TI-P203-01 CTLS Issue 20
Page 8 of 15
DRV4 and DRV4G Cast Steel Pressure Reducing Valves
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