Control valves

Pressure reducing/surplussing valves

F

G

F

Steam

saturation

curve

G

C

E

F

F

E

4.6.105

Pressure / temperature limits

DP27, DP27E, DP27R and DP27Y

DP27G and DP27GY

������

A

B

D

������

������

������

������

����

������

������

����

�

�

��

��

��

����

���� �������� ����

����

�

�

�

�

���

�

���

�

���

�

����

Pressure bar g

Pressure bar g

The product must not be used in this region.

ScrewedandflangedEN1092PN25,ASME300andBS10TableH

Flanged ASME 150.

The DP27G and DP27GY are limited to 120 °C.

The DP27E is limited to 10 bar g @ 190 °C.

A-D-E

A-B-C

F-F-E

G-G

Body design conditions

Maximum design pressure

Maximum design temperature

Minimum design temperature

Maximum upstream pressure for saturated steam service

For ASME 150, see A-B-C above

Maximum operating temperature

For ASME 150, see A-B-C above

Minimum operating temperature

Note: For lower operating temperatures consult Spirax Sarco

Maximum differential pressure

Designed for a maximum cold hydraulic test pressure of :

Note: With internals fitted, test pressure must not exceed :

Note:

A variable rate conical pressure adjustment spring is fitted providing a downstream pressure range of 0.2 - 17 bar g. For the DP27Y

downstream pressure range is 0.2 - 3 bar g.

A-D-E

A-B-C

DP27, DP27R and DP27Y

DP27G and DP27GY

DP27E

DP27, DP27Y

DP27E

DP27G, DP27GY

DP27, DP27R and DP27Y

DP27G and DP27GY

DP27E

PN25

25 bar g @ 120 °C

17.2 bar g @ 40 °C

232 °C @

232 °C @

190 °C @

120 °C @

21barg

-10 °C

17 bar g

25barg

10barg

21 bar g

10 bar g

25 bar g

0 °C

17 bar

25barg

10 bar

38barg

25barg

TI-P470-01 CH Issue 10

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

Page 2 of 11

T

e

m

p

e

r

a

t

u

r

e

°

C

T

e

m

p

e

r

a

t

u

r

e

°

C