44
Control systems Control valves
Pressure / temperature limits - KEA43 (Carbon steel)
Pressure psi g
A
E
Steam saturation curve
E
D
C
B
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.
A - C Flanged JIS / KS 20.
A - D Flanged ASME 150.
E - E Flanged JIS / KS 10.
4.1 50
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
ASME 150 and ASME 300
ASME 150
19.6 bar g @ 38 °C (284 psi g @ 100 °F)
Maximum design pressure
ASME 300
51.1 bar g @ 38 °C (740 psi g @ 100 °F)
Maximum differential pressure design
Full PEEK seat (P)
19 bar
Maximum design temperature
425 °C
(800 °F)
Minimum design temperature
-29 °C
(-20 °F)
PEEK soft seat (P)
220 °C
(428 °F)
Standard packing PTFE chevron
250 °C
(482 °F)
Extended bonnet (E) with PTFE chevron Graphite packing (H) Extended bonnet (E) with graphite packing
Maximum operating temperature
425 °C
(800 °F)
Note: We recommend that an extended bonnet (E) with graphite packing is used where valve operation is above 300 °C (572 °F).
TI-S24-73 CTLS Issue 4
Page 10 of 15
Spira-trol TM Two-port Control Valves K Series DN125 to DN300 and 6" to 12"
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