Materials - DP27G and DP27GY

See DP27 items list on pages 3 and 4 for common

components

Materials - DP27R

See DP27 items list on pages 3 and 4 for common

components

No. Part

35 Pilot valve chamber

36 Pilot valve assembly

37 Main valve assembly

1

2

3

4

5

7

6

4.6.109

33

19

31

32

30

Material

Stainless steel /

Nitrile

DP27G

No. Part

Material

SG iron

Brass

Stainless steel

29

Technical data (Solenoid valve)

29

Voltages available

Frequency

Power consumption

Notes for DP17R only:

Kv values

220 / 240 ±10% Vac or 110 / 220 ±10% Vac (others available on request)

50 / 60 Hz

Inrush 45 VA

Holding 23 VA

1. Maximum downstream reduced pressure 15 bar g.

Control valves

Pressure reducing/surplussing valves

SG iron

Brass / PTFE / Nitrile

Actuating

chamber cover

Actuating air

supply union

Diaphragm

spring

Actuating

chamber gasket

Spring plate

DIN 1693 GGG 40.3

BS 970 431 S29

38

39

40

41

42

7

38

39

33

15

16

17

DIN 1693 GGG 40.3

BS 2056 Gr. 302 S26

The Kv maximum values shown below are full capacities and should be used for safety valve sizing purposes only.

DN15LC

DN15

1.0

2.8

DN20

DN25

DN32

5.5

8.1

12.0

Cv (US) = Kv x 1.156

DN40

DN50

17.0

28.0

For conversion: Cv (UK) = Kv x 0.963

Note: Where the internal balance pipe is used the valve capacity will be reduced.

8

35

40

42

8, 41

9

23

11

19

20

21

22

24

19

25

28

26

27

36

18

18

20

37

22

23

24

19

25

28

32

26

30

27

TI-P470-01 CH Issue 10

DP27, DP27E, DP27G, DP27GY, DP27R and DP27Y Pilot Operated Pressure Reducing Valves with SG Iron Bodies

Page 6 of 11

31

2. The control pressure signal to the pilot diaphragm must be approximately 0.7 bar above the required

reduced downstream pressure.

Stainless steel reinforced

BS 2815 Gr. A

exfoliated graphite

Brass

BS 2872 CZ 122

DP27R