Steam traps
Bimetallic
Kv values
Size
Kv value
For conversion:
DN15 - 1⁄2"
0.25
Cv (UK) = Kv x 0.963 Cv (US) = Kv x 1.156
450
A
400
300
200
100
DN20 - 3⁄4"
0.6
DN25 - 1"
0.6
DN40 - 11⁄2"
0.6
The product must not be used in
this region or beyond the parameter
of the PMA or TMA of the relative
end connection.
The product should not be used in this
region as damage to the internals
may occur.
PN64
63 bar g @ 200°C
450°C @ 43.5 bar g
-10°C
45 bar g @ 259°C
450°C @ 43.5 bar g
0°C
95 bar g
The product must not be used in
this region or beyond the parameter
of the PMA or TMA of the relative
end connection.
The product should not be used in this
region as damage to the internals
may occur.
ASME 300
51 bar g @ 120°C
450°C @ 34 bar g
-10°C
45 bar g @ 259°C
450°C @ 34 bar g
0°C
72 bar g
The product must not be used in
this region or beyond the parameter
of the PMA or TMA of the relative
end connection.
The product should not be used in this
region as damage to the internals
may occur.
JIS / KS 30K
48 bar g @ 0°C
450°C @ 22 bar g
-10°C
45 bar g @ 100°C
450°C @ 22 bar g
0°C
77 bar g
Pressure/temperature limits (ISO 6552)
Steam
saturation curve
0
B
0
10
20
30
40
50
6063
Pressure bar g
A - B
Screwed
Socket weld
Butt weld
Flanged:
EN 1092 PN64
Body design condition
PMA Maximum allowable pressure
TMA Maximum allowable temperature
Minimum allowable temperature
PMO Maximum operating pressure for saturated steam service
TMO Maximum operating temperature
Minimum operating temperature
Designed for a maximum cold hydraulic test pressure of:
Steam
saturation curve
A - C
Flanged:
ASME 300
450
A
400
300
200
100
C
0
0
10
20
30
40
51
Pressure bar g
Body design condition
PMA Maximum allowable pressure
TMA Maximum allowable temperature
Minimum allowable temperature
PMO Maximum operating pressure for saturated steam service
TMO Maximum operating temperature
Minimum operating temperature
Designed for a maximum cold hydraulic test pressure of:
450
A
400
300
200
100
0
D
0
10
20
30
40
48
Pressure bar g
Body design condition
PMA Maximum allowable pressure
TMA Maximum allowable temperature
Minimum allowable temperature
PMO Maximum operating pressure for saturated steam service
TMO Maximum operating temperature
Minimum operating temperature
Designed for a maximum cold hydraulic test pressure of:
Steam
saturation curve
A - D
Flanged:
JIS/KS 30K
TI-P025-01 ST Issue 9
SM45 Bimetallic Steam Trap
Page 2 of 4
5.3.14
T
e
m
p
e
r
a
t
u
r
e
°
C
T
e
m
p
e
r
a
t
u
r
e
°
C
T
e
m
p
e
r
a
t
u
r
e
°
C
