UK Product Handbook 2026 - Volume 1

Control systems Pressure reducing/surplussing valves

4

Materials (continued)

44

DN15 and DN20

DN65 to DN100

4.6 43

43

40

41

39

46

DN25

45

42

38

No.

Part

Material

38 39 40 41 42 43 44 45 46

Diaphragm clamp

Stainless steel

ASTM A351 CF8M BS 1449 Pt1 HR14

Piston

Steel zinc plated Steel zinc plated Steel zinc plated Steel zinc plated Stainless steel Stainless steel Stainless steel

Spindle

BS 970 230 M07

Mounting nuts

BS 3692 Gr. 8

Coupling

Thread insert

DN15 and DN20 DN25 to DN100 DN65 to DN100 DN65 to DN100

DTD 734

Self-locking nut

BS 6105 A2

Clamp plate

ASTM A276 316L

Clamp plate gasket

Reinforced exfoliated graphite

TI-P203-01 CTLS Issue 20

Page 9 of 15

DRV4 and DRV4G Cast Steel Pressure Reducing Valves

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