Spirax Sarco - Catalogo Agosto 2017

Control valves

A

E

D

Steam

saturation

curve

C

B

4.1.27 Pressure / temperature limits - KEA41, KEA42 and KEA43 (Carbon steel)

��

Pressure psi g

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Pressure bar g

The product must not be used in this region.

Graphite stem sealing is required for use in this region

A-B Flanged ASME 300 and screwed NPT and SW.

A-C Flanged JIS / KS 20.

A-D Flanged ASME 150.

E-E 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 above.

3. As standard the KEA, KFA, KLA series two-port control valves are supplied with the PTFE stem sealing option.

Body design conditions

Maximum design pressure

Maximum differential pressure design

Maximum design temperature

Minimum design temperature

Maximum operating temperature

ASME 150 and ASME 300

(284 psi g @ 100 °F)

(740 psi g @ 100 °F)

(800 °F)

(-20 °F)

(392 °F)

(482 °F)

(800 °F)

is above 300 °C (572 °F).

TI-S24-71 CH Issue 10

Spira-trol

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

ASME 150 (6" to 12" only)

ASME 300

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

Graphite packing (H)

Extended bonnet (E) with graphite packing

19.6 bar g @ 38 °C

51.1 bar g @ 38 °C

7 bar

19 bar

425 °C

-29 °C

200 °C

250 °C

425 °C

Note: We recommend that an extended bonnet (E) with graphite packing is used where valve operation

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