Materials

No. Part

1

Adjustment screw

2

Adjustment lock-nut

3

Washer

4

Spring housing

5

Top spring plate

6

Pressure adjustment

spring

7

Bottom spring plate

1

2

3

4

5

6

12

DN15 to DN50

Spring

Securing nuts

housing Securing studs

steel

steel

steel

8

8

9

Pilot diaphragm

Stainless

DN15 to DN50

7

29

10

10 Pilot valve housing

11 Pilot valve plunger

12 Spring housing cover

13 Pilot valve and seat unit

14 Internal strainer

15 Body gasket

16 Main valve return spring

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

M10

BS 1449

BS 3100

BS 970

BS 1449

BS 970

BS 1449

reinforced

x 30 mm

316 S31

316 C12

431 S29

304 S12

431 S29

304 S16

302 S25

431 S29

431 S29

304 S14

316 C12

9

External

11

downstream

21

pressure sensing

pipe union

13

14

15

19

16

Internal

17

balance

18

pipe

20

4.6.75

17

19 Balance pipe assembly

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

DN15 and DN20

DN25 to DN50

DN80

Cast

Stainless steel

Stainless steel

Stainless steel

DN15 and DN20

DN25 and DN32

DN40 and DN50

DN80

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

DN80 only

Stainless steel

BS 2056

BS 970

BS 970

BS 3605

BS 3100

Main valve

18 Main valve seat

20 Main valve body

21 Pilot valve

Securing nuts

housing

Securing studs

22

Main diaphragm

chamber

23 Main

Securing nuts

diaphragm Securing bolts

24 Main diaphragms

25 Main diaphragm plate

26 Pushrod

27 Control pipe assembly

28 Plug " BSP

29 Pressure pipe union

30 Lock-nut

45

Body nuts

Body studs

46

Upper main

diaphragm chamber

BS 6105 A4/80

BS 6105 A4/80

M10 x 25 mm

M12 x 30 mm

M12 x 40 mm

BS 3100 316 C12

BS 3692 Gr. 8

BS 6105 A4/80

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 970 431 S29

BS 970 316 S31

BS 6105 A4/80

BS 3692 Gr. 8

BS 6105 A4/80

M12 x 40 mm

BS 3100 316 C12

25

24

26

27

30

23

22

28

Control valves

Pressure reducing/surplussing valves

Material

Stainless

Stainless

Stainless

Stainless

Stainless

Stainless

Stainless

Stainless

steel

steel

steel

steel

steel

steel

BS 6105 A4/80

BS 6105 A4/80

BS 1449 304 S16

DIN 3100 316 C12

BS 970 431 S29

BS 2056 302 S25

BS 970 431 S29

BS 6105 A4/80

BS 6105 A4/80

Stainless steel

exfoliated graphite

Page 2 of 7

DP163, DP163G and DP163Y

Pilot Operated Pressure Reducing Valve with Stainless Steel Bodies

TI-P107-01 CH Issue 10

Page 2 of 7

45

46

DN80