Control valves
Control valves
Steam
saturation
curve
Steam
saturation
curve
4.1.51
Pressure/temperature limits - LEA31 and LEA33 cast iron valve body
Screwed NPT
Flanged
ASME class 125
Flanged
JIS / KS 10
Pressure psi g
Pressure bar g
Pressure psi g
Pressure bar g
Note:
When the process fluid temperature
is sub-zero and the ambient
temperature is below +5 °C (41 °F),
the external moving parts of the
valve and actuator must be heat
traced to maintain normal operation.
The product must not be used in this region.
PTFE soft seated valves are limited to a maximum operating temperature of 200 °C.
Body design conditions
Maximum design pressure
Maximum design temperature
Maximum differential pressure
design
Minimum design temperature
Maximum operating temperature
See the Spira-trol
TM
selection
guide on page 18 for the full list
of available options
Minimum operating temperature
Maximum differential pressures
PTFE soft seat (G)
PEEK soft seat (K)
Full PEEK seat (P)
Standard packing PTFE chevron
PTFE soft seat
PEEK soft seat
Graphite packing
Extended bonnet with PTFE chevron
Extended bonnet with graphite packing
Bellows
- Option P
- Option G
- Option K
- Option H
- Option E
- Option E
- Option D
or N
or P
13.7 bar g @ 65 °C
232 °C @ 8.6 bar g
7 bar
7 bar
19 bar
-29 °C
232 °C
200 °C
232 °C
232 °C
232 °C
232 °C
232 °C
-29 °C
21 bar g
ASME 125
(200 psi g @ 150 °F)
(450 °F @ 125 psi g)
(-20 °F)
(450 °F)
(392 °F)
(450 °F)
(450 °F)
(450 °F)
(450 °F)
(450 °F)
(-20 °F)
(300 psi g)
Note: For lower operating temperatures consult Spirax Sarco
See relevant actuator Technical Information sheet.
Maximum cold hydraulic test pressure of:
TI-S24-70 CH Issue 6
Spira-trol
TM
Two-port Control Valves EN Standard LE, LF and LL DN15 to DN100 and ASME Standard LEA, LFA and LLA 1⁄2" to 4"
Page 10 of 18
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