44-607 Tuffy
®
II Liquid Level Switch
27
ASME B31.1
ASME B31.1,
&
ASME B31.3
Standard
ASME B31.3
NACE
& NACE
Process Connection Material
1
2
N/A
N/A
Carbon Steel Flange and cladding with
316/316L SS float holder & trim
A
E
J
N
Carbon Steel Flange with
316/316L SS process wetted face
B
F
K
P
All 316/316L Stainless Steel
PROCESS CONNECTION MATERIAL/DESIGN CODE
2.8 Model Numbers
2.8.4 Adjustable Wide Differential Models (continued)
➀
Maximum process temperature is based on an ambient temperature between
0° and +100° F (-18° and +30° C). For ambients outside this range, see switch
temperature charts on pages 16–18.
➁
See Switch Temperature Ranges on page 16 for minimum process temperatures.
Code
Contact Type and Material
Electric Switch Rating
Maximum Process
Temperature
➀➁
vAC
vDC
120
240
24
120
Cast Iron
Housing
Cast Alum.
Housing
0
SPDT w/silver contacts
10.0
10.0
6.0
0.6
+750° F (+399° C)
650° F (+343° C)
1
DPDT (dual SPDT) w/silver contacts
10.0
10.0
6.0
0.6
+750° F (+399° C)
650° F (+343° C)
2
SPDT w/gold plated contacts
0.1
—
0.1
—
+375° F (+190° C)
325° F (+162° C)
3
DPDT (dual SPDT) w/gold plated contacts
0.1
—
0.1
—
+375° F (+190° C)
325° F (+162° C)
4
HS SPDT w/silver contacts
1.0
1.0
3.0
0.5
+750° F (+399° C)
650° F (+343° C)
6
HS SPDT w/gold plated contacts
0.5
0.5
0.5
0.5
+750° F (+399° C)
650° F (+343° C)
FM
CSA ATEX Ex d ATEX IS IEC Ex d
A
C
1
M
1
Cast Aluminum,
3
⁄
4
" NPT Conduit Entry
B
D
2
N
2
Cast Iron,
3
⁄
4
" NPT Conduit Entry
3
P
3
Cast Aluminum, M20
¥
1.5 Conduit Entry
4
R
4
Cast Iron, M20
¥
1.5 Conduit Entry
HOUSING MATERIAL/APPROvAL
N/A
