DN15 to DN50

DN80

4.6.67

25

24

Materials

No. Part

22

Main diaphragm

chamber

23

Main

diaphragm Securing

bolts

24 Main diaphragms

25 Main diaphragm plate

26 Push rod

27 Control pipe assembly

28 Plug " BSP

29 Pressure pipe union

30 Lock-nut

45

46

26

27

30

23

22

28

Securing

nuts

DIN 17245 GS C25

BS 3692 Gr. 8

BS 3692 Gr. 8.8

M12 x 50 mm

M12 x 60 mm

M12 x 65 mm

M12 x 80 mm

BS 1449 316 S31

BS 970 431 S29

BS 970 431 S29

BS 3605 304 S14

BS 3692 Gr. 8

45

46

Body studs

Body nuts

Upper main diaphragm

chamber

BS 4439 Gr. 8.8

BS 3692 Gr. 8

M12 x 40 mm

1.0619+N

Control valves

Pressure reducing/surplussing valves

Material

Cast steel

Steel

Steel

DN15 and DN20

DN25 and DN32

DN40 and DN50

DN80

Stainless

steel

Stainless

steel

Stainless

steel

Stainless

steel

Steel

Steel

Steel

No. Part

Material

Steel

Steel

DN15 to DN80

Cast steel

TI-P006-01 CH Issue 13

DP143, DP143G, DP143H and DP143Y Pilot Operated Pressure Reducing Valves with Cast Steel Bodies

Page 4 of 9

For DN15 to DN50, parts 1 to 21, see page 3