Control valves

Control valves

F

Steam

saturation

curve

F

E

D

4.1.25

Pressure / temperature limits - KE71 and KE73 (SG iron)

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A

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The product must not be used in this region.

High temperature packing is required for use in this region.

High temperature bolting and packing is required for use in this region

A-D Flanged EN 1092 PN40 and Screwed BSP.

A-E Flanged EN 1092 PN16.

A-F Flanged JIS / KS 10.

Notes:

1. Where the process fluid temperature is sub-zero and the ambient temperature is below +5 °C, the external moving parts of the valve

and actuator must be heat traced to maintain normal operation.

2. When selecting a valve with a bellows sealed bonnet, the pressure / temperature limits of the bellows must be read in conjunction with

the valve pressure / temperature limits shown in table below.

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Pressure bar g

Body design conditions

Maximum design pressure

Maximum differential pressure

design

Maximum design temperature

Minimum design temperature

Maximum operating temperature

PTFE soft seat (G)

PEEK soft seat (K)

Full PEEK seat (P)

PTFE soft seat (G)

Standard packing PTFE chevron

PEEK seat (K and P)

Extended bonnet (E) with PTFE chevron

High temperature packing (H)

Extended bonnet (E) with graphite packing

PN25

25 bar g @ 120 °C

7 bar

7 bar

19 bar

350 °C

-10 °C

200 °C

250 °C

350 °C

Note: We recommend that an extended bonnet (E) with graphite packing is used where valve operation is above 300 °C.

Page 14 of 29

TI-S24-71 CH Issue 10

Spira-trol

TM

Two-port Control Valves EN Standard KE, KF and KL DN15 to DN300 and ASME Standard KEA, KFA and KLA 1⁄2" to 12"

T

e

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