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Series 445L Standard Threaded Well for Industrial Glass Thermometers
Application:
Fits liquid-in-glass thermometers made to S.A.M.A.
standards. Tapered bore is made 0.008" oversize to
eliminate possibility of thermometer bulb expanding into
the well, thus preventing removal.
Connection Size:
3
⁄4" NPT and 1" NPT are standard. Other thread sizes
are available upon request.
Series 445L—Lagging Extension Type
13
/
1
/
1 – 18 NEF
4
THREAD
16
EXTENSION
1
/
2
LAGGING
1
T
THREAD
ALLOWANCE
P NPT
A BULB LENGTH (ACTUAL)
Dimensions: inches
To Order Visit omega.com/445l for Pricing and Details
S = U + 1
U INSERTION LENGTH
Q DIA.
49
/
64
DIA.
Ext Nom Lag Bulb Insert Shank
Thread Bulb Ext Length Length Diameter
P Model Number Length T A U Q
3⁄4 NPT 3/4-445L-S6E-(*) 6 2
3/4-445L-S9E-(*) 9 3 91⁄8 51⁄16
3/4-445L-S12E-(*) 12 3 121⁄8 81⁄16
3/4-445L-S18E-(*) 18 3 181⁄8 141⁄16
3/4-445L-S24E-(*) 24 3 241⁄8 201⁄16
1 NPT 1-445L-S6E-(*)6 2
1-445L-S9E-(*) 9 3 91⁄8 51⁄16 1
1-445L-S12E-(*) 12 3 121⁄8 81⁄16 1
1-445L-S18E-(*) 18 3 181⁄8 141⁄16 1
1-445L-S24E-(*) 24 3 241⁄8 201⁄16 1
Specify material type “304SS” for 304 Stainless Steel, “316SS” for 316 Stainless Steel, “CS” for Carbon Steel or
*
“BRASS” for brass. PFA coating available, see omega.com.
Ordering Example: 3/4-445L-S6E-304SS, 304 stainless steel thermowell with
0.445" internal diameter for a glass thermometer, 2
6" nominal bulb length.
For Assistance in Choosing Head and Well Assemblies, See guide at omega.com. These wells are
compatible with OMEGA® NB1, NB2; PR-12, PR-14, and NPT-style probes, as well as DialTemp™
Thermometers.
1
⁄2 6
Materials:
Carbon Steel (C-1018); Brass (ASTM B-16),
A.I.S.I. 304, A.I.S.I. 316, Monel
®
. Many other materials
available upon request.
Additional Designs:
Other designs of wells to fit this class of thermometer are
available. These include socket weld, heavy duty and
flanged types.
0.445 DIA. AT
9
/
2
16
TAPER 0.180/FT
45
/
2
64
1
⁄2" Lagging Extension, 2 9⁄16", insertion length and a
THEORETICAL
OF TAPER
.
11
/
DIA.
16
3
/
32
1
⁄2 6
1
⁄8 2
END
1
⁄8 2
9
⁄16 —
3
⁄4 NPT external thread,
Metric Models
Available!
Visit
omega.com
9
⁄16 —
7
⁄8
7
⁄8
7
⁄8
7
⁄8
Shown smaller
than actual size.
Maximum Fluid Velocity—feet per second
Insertion Length — “U”
Well
Type
Material 2
3⁄4"-445S Brass 259 (52.3) 142 (26.4) 55.8 (16.6) 29.8 (12.1) 18.4 (9.5) 12.5 (7.8) 9.0 (6.7) 6.8
and Carbon Steel 352 (94.6) 198 (48.0) 77.5 (30.1) 41.4 (22.0) 27.8 (17.3) 17.3 (14.2) 12.5 (12.1) 9.5
3
⁄4"-445L A.I.S.I. 304 & 316 382 (131) 206 (66.3) 80.9 (41.7) 43.2 (30.2) 26.6 (24.0) 18.1 13.1 9.9
Monel 277 (105) 179 (53.1) 70.3 (33.4) 37.5 (24.3) 23.2 (19.1) 15.7 11.3 8.5
1"-445S Brass 259 (76) 156 (38.5) 61.4 (24.2) 32.8 (17.7) 20.2 (13.9) 13.7 (11.4) 9.9 7.5
and Carbon Steel 352 (137) 215 (69.4) 34.2 (43.6) 45.0 (31.9) 27.7 (25) 18.9 13.6 10.3
1"-445L A.I.S.I. 304 & 316 382 (190) 224 (96.1) 87.8 (60.4) 46.9 (44.1) 28.9 19.7 14.2 10.8
Monel 277 (152) 196 (77.1) 77.2 (48.5) 41.4 (35.4) 25.4 17.2 12.4 9.4
Where single values appear in the velocity tables, these may be considered safe for water, steam, air or gas. In the
shorter insertion lengths, consideration is given to the velocity pressure effect of water flowing at higher velocities. The
values in parentheses, therefore, represent safe values for water flow, while the unbracketed values may be used for
steam, air, gas and similar density fluids.
See omega.com for Pressure-Temperature Ratings.
9
⁄16 51⁄16 81⁄16 111⁄16 141⁄16 171⁄16 201⁄16 231⁄16
Section on Velocity, ar omega.com
B-31
See Introduction to Thermowells,
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