24
46-635 External Cage Displacer Actuated Liquid Level Switches
4.5 Model Numbers
4.5.1 Standard Pressure
SPECIFIC GRAVITY AND PRESSURE RATING CODE
TANK CONNECTION TYPE AND SIZE
Model
Cage
Style
Cage
Material
Minimum
S.G.
Pressure Rating at given Temperature – psi (bar)
+100 °F
(+38 °C)
+300 °F
(+149 °C)
+500 °F ➀
(+260 °C)
B74
Sealed
Carbon Steel
0.40
1480
(102)
1315
(91)
n/a
B74 304 Stainless Steel
1440
(99)
1200
(83)
n/a
B74 316 Stainless Steel
1440
(99)
1240
(85)
n/a
H13 Carbon Steel
See Chart
Below
1500
(103)
1500
(103)
1350
(93)
C74
(300#)
Flanged
300# Carbon steel
See Chart
Below
740
(51)
740
(51)
740
(51)
C74
(600#)
600# Carbon steel
1480
(102)
1400
(97)
1190
(82)
H15 Carbon steel
1500
(103)
1500
(103)
1350
(93)
Model
Minimum Specific Gravity
Up to Temperature Shown
+100 °F
(+38 °C)
+200 °F
(+93 °C)
+300 °F
(+149 °C)
+400 °F
(+204 °C)
+500 °F
(+260 °C)
H13
0.40 0.40 0.40 0.41 0.44
H15 0.40 0.43 0.46 0.48 0.50
C74 0.40 0.40 0.40 0.42 0.44
MATERIALS OF CONSTRUCTION
Code Applicable Models Cage Sleeve Spring Trim
1 B74, C74, H13, H15 Carbon Steel 400 SS Inconel & 316 SS
2 ➁ H13, H15 Carbon Steel 400 SS 316 SS
2 B74, C74 Carbon Steel 316 SS Inconel & 316 SS
3 B74 304 Stainless Steel 316 SS Inconel & 316 SS
4 B74 316 Stainless Steel 316 SS Inconel & 316 SS
B74 C74 300 lb C74 600 lb H13 & H15
1" 1
1
⁄2" 2" 1" 1
1
⁄2" 2" 1" 1
1
⁄2" 2" 1" 1
1
⁄2" 2" Connection Type C/C Location
B20 C20 D20 B70 C70 D70 B90 C90 D90 B20 C20 D20 NPT
B30 C30 D30 B80 C80 D80 B01 C01 D01 B30 C30 D30 Socketweld
N30 P30 Q30 —— ————N30 P30 Q30 150 lb ANSI flanges Std side/bottom
N40 P40 Q40 N40 P40 Q40 ———N40 P40 Q40 300 lb ANSI flanges
N50 P50 Q50 —— —N50 P50 Q50 N50 P50 Q50 600 lb ANSI flanges
——— —— ——— —B40 C40 D40
NPT
Std
——— —— ——— —B44 C44 D44 14"
——— —— ——— —B50 C50 D50
Socketweld
Std
——— —— ——— —B54 C54 D54 14"
S30 T30 V30 —— ————S30 T30 V30
150 lb ANSI flanges
Std
side/side
——— —— ——— —S34 T34 V34 14"
S40 T40 V40 S40 T40 V40 ———S40 T40 V40
300 lb ANSI flanges
Std
——— —— ——— —S44 T44 V44 14"
S50 T50 V50 —— —S50 T50 V50 S50 T50 V50
600 lb ANSI flanges
Std
——— —— ——— —S54 T54 V54 14"