Omega Products 1-260L-U101-2-304SS User Manual
T
-260L
Series 260L Standard Threaded Well for
Application:
Standard length, 1⁄4" stem, bimetal thermometers;
#20-gage thermocouple elements; unarmored
liquid-in-glass test thermometers. Other temperaturesensing elements having 0.252" maximum diameter.
Connection Size:
1
⁄2, 3⁄4 and 1 NPT are standard. Other thread sizes are
available upon request.
Materials:
Brass (ASTM B-16), Carbon Steel (C-1018), Stainless
Steel A.I.S.I. 304 & A.I.S.I. 316, Monel®. Wells are also
available in special materials; prices on request.
Cap and Chain Options:
For Brass cap, add suffix “-CC-Brass” to the end of the
model number when ordering for additional cost.
For 304 SS cap, add suffix “-CC” to the end of the model
number for additional cost.
1
⁄4" Diameter Elements
Series 260L—Lagging Extension Type
†
NPSM internal
pipe thread
will accept
both NPT and
NPS male threads.
DIA.
1
/
4
Metric Models
Available!
Visit omega.com
3
/
4
WRENCH
ALLOWANCE
1
/
NPSM
2
†
T + 1
T
LAGGING
EXTENSION
P NPT
3
/
4
1
THREAD
ALLOWANCE
Dimensions: inches
U INSERTION LENGTH
Q DIA.
A STEM LENGTH
1
/
2
2
0.002
0.260 BORE
1
/
2
To Order Visit omega.com/series_260l for Pricing and Details
Ext Stem Insert Lag Shank
Thread P Model Number Length A Length U Ext T Dia. Q
1⁄2 NPT 1/2-260L-U21/2-(*) 6 21⁄2 2 —
1/2-260L-U41/2-(*) 9 41⁄2 3 5⁄8
1/2-260L-U71/2-(*) 12 71⁄2 3 5⁄8
1/2-260L-U101/2-(*) 15 101⁄2 3 5⁄8
1/2-260L-U131/2-(*) 18 131⁄2 3 5⁄8
1/2-260L-U191/2- (*) 24 191⁄2 3 5⁄8
3⁄4 NPT 3/4-260L-U21/2-(*) 6 21⁄2 2 —
3/4-260L-U41/2-(*) 9 41⁄2 3 3⁄4
3/4-260L-U71/2- (*) 12 71⁄2 3 3⁄4
3/4-260L-U101/2-(*) 15 101⁄2 3 3⁄4
3/4-260L-U131/2-(*) 18 131⁄2 3 3⁄4
3/4-260L-U191/2- (*) 24 191⁄2 3 3⁄4
1 NPT 1-260L-U21/2-(*) 6 21⁄2 2 —
1-260L-U41/2-(*) 9 41⁄2 3 7⁄8
1-260L-U71/2- (*) 12 71⁄2 3 7⁄8
1-260L-U101/2-(*) 15 101⁄2 3 7⁄8
1-260L-U131/2-(*) 18 131⁄2 3 7⁄8
1-260L-U191/2-(*) 24 191⁄2 3 7⁄8
* Specify material type “304SS” for 304 stainless steel, “316SS” for 316 stainless steel, “CS” for carbon steel or
“BRASS” for brass. PFA coating available.
Ordering Example: 3/4-260L-U71/2-304SS, 304 stainless steel thermowell with
0.260" internal Dia., 3" lagging extension, 71⁄2" insertion length and a 12" stem length.
For Assistance in Choosing Head and Well Assemblies, visit omega.com/head_and_well
3
⁄4 NPT external thread,
Shown close
to actual size.
Visit omega.com
for pressuretemperature
ratings.
Maximum Fluid Velocity—Feet Per Second
Insertion Length – “U”
Well Type Material 21⁄2 41⁄2 71⁄2 101⁄2 131⁄2 161⁄2 191⁄2 221⁄2
1
⁄2
" - 260S
1
⁄2
" - 260L
Monel 261 (118) 95 (65.5) 34.4 17.5 10.5 7.1 5.2 3.8
3
⁄4
" - 260S
3
⁄4
" - 260L
Monel 261 (118) 112 (79.8) 40.6 20.7 12.4 8.3 6.1 4.5
1" - 260S
1" - 260L
Monel 261 (118) 128 (93.3) 46.7 23.7 14.4 9.5 6.9 5.1
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.
Brass 207 (59.3) 75.5 (32.2) 27.3 (19.7) 13.9 8.4 5.6 4.1 3.0
Carbon steel 290 (106) 105 (59) 38.2 (36.3) 19.4 11.8 7.8 5.7 4.2
and
A.I.S.I. 304 and 316 300 (148) 109 (82.2) 39.5 20.1 12.2 8.1 5.9 4.4
Brass 207 (59.3) 89.1 (39.8) 32.2 (23.9) 16.4 9.9 6.6 4.8 3.6
Carbon steel 290 (106) 123 (71.2) 44.9 (42.7) 22.8 13.8 9.3 6.7 4.9
and
A.I.S.I. 304 and 316 300 (148) 128 (99.3) 46.4 23.6 14.3 9.6 6.9 5.1
Brass 207 (59.3) 102 (47.6) 37.0 (28) 18.8 11.4 7.6 5.5 4.1
Carbon steel 290 (106) 143 (84.3) 51.6 (50.6) 26.2 15.9 10.6 7.6 5.7
and
A.I.S.I. 304 and 316 300 (148) 148 (117) 53.5 27.2 16.5 11.0 7.9 5.9
B-19
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