1-260V-U2-304SS

**Van Stone[† ] Thermowells for[1] ⁄4" and[3] ⁄8" Diameter Elements** 

## **Series 260V and 385V** 

**Application:** 260V series fits standard length[1] ⁄4" diameter elements. 385V series fits standard length[3] ⁄8" diameter elements. **Connection Size:** Standard wells fit 1" lap joint flanges. Other sizes also available. Prices below are for 1" Van Stone Wells. Consult factory for prices on other sizes. 

## **Materials:** 

Carbon Steel (C-1018), A.I.S.I. 304, A.I.S.I. 316 and Monel[®] are standard. Other materials are available. 

## **Backing Flange:** 

When desired, a carbon steel lap joint flange can be supplied with these wells. When ordering, specify flange pressure. 

## **Series 260V and 385V** 

**Shown smaller than actual size.** 

21/4 U  INSERTION LENGTH CUSTOMER-SUPPLIED FLANGE SIZE & RATING AS REQUIRED 1/2 P DIA.NPSM |t[†] ~~Ce~~ 3/8 nne[ZZAZZZZZZLL\7, ¥ Q DIA. R  RAISED FACE DIA. B ± 0.002   BORE atk ! _ an = A  STEM LENGTH[/1] 4 **Dimensions: inches** 

**†** NPSM internal pipe thread will accept both NPT and NPS male threads. 

## ~~Lit~~ 

## **To Order** _**Visit omega.com/series_260V_385V**_ 

|**To Order****_Visit omega.com/series_260V_385Vga.com/series_260V_385Va.com/series_260V_385V_**<br>~~Lit~~|**To Order****_Visit omega.com/series_260V_385Vga.com/series_260V_385Va.com/series_260V_385V_**<br>~~Lit~~|**To Order****_Visit omega.com/series_260V_385Vga.com/series_260V_385Va.com/series_260V_385V_**<br>~~Lit~~|**To Order****_Visit omega.com/series_260V_385Vga.com/series_260V_385Va.com/series_260V_385V_**<br>~~Lit~~|**To Order****_Visit omega.com/series_260V_385Vga.com/series_260V_385Va.com/series_260V_385V_**<br>~~Lit~~|
|---|---|---|---|---|
|**Model Number**<br>~~Lit~~|**Stem**<br>**Length**<br>**A**|**Insertion**<br>**Length**<br>**U**|**Shank**<br>**Diameter**<br>**Q**|**Bore**<br>**Diameter**<br>**B**|
|**1-260V-U2-(*)**<br> **1-260V-U4-(*)**<br> **1-260V-U7-(*)**<br> **1-260V-U10-(*)**<br> **1-260V-U13-(*)**<br> **1-260V-U16-(*)**<br>**1-260V-U22-(*)**|4<br>6<br>9<br>12<br>15<br>18<br>24|2<br>4<br>7<br>10<br>13<br>16<br>22|3⁄4<br>3⁄4<br>3⁄4<br>3⁄4<br>3⁄4<br>3⁄4<br>3⁄4|0.260<br>0.260<br>0.260<br>0.260<br>0.260<br>0.260<br>0.260|
|**1-385V-U2-(*)**<br> **1-385V-U4-(*)**<br> **1-385V-U7-(*)**<br> **1-385V-U10-(*)**<br> **1-385V-U13-(*)**<br> **1-385V-U16-(*)**<br>**1-385V-U22-(*)**|4<br>6<br>9<br>12<br>15<br>18<br>24|2<br>4<br>7<br>10<br>13<br>16<br>22|7⁄8<br>7⁄8<br>7⁄8<br>7⁄8<br>7⁄8<br>7⁄8<br>7⁄8|0.385<br>0.385<br>0.385<br>0.385<br>0.385<br>0.385<br>0.385|



_*****[Specify material type “]_ _**[304SS]**[” for 304 stainless steel or ]_ _**[“316SS” ]**[for 316 stainless steel.]_ _**Ordering Example: 1-260V-U10-316SS,** 316SS Van Stone thermowell with 1" pipe OD, 0.260" ID, 12" stem length, and a 10" insertion length._ 

|**_*_**_[Specify material type “]_**_[304SS]_**_[” for 304 stainless steel or ]_**_[“316SS” ]_**_[for 316 stainless steel.]_<br>**_Ordering Example: 1-260V-U10-316SS,_**_316SS Van Stone thermowell with 1" pipe OD, 0.260" ID,_<br>_12" stem length, and a 10" insertion length._|_[for 316 stainless steel.]_<br>_316SS Van Stone thermowell with 1" pipe OD, 0.260" ID,_|_[for 316 stainless steel.]_<br>_316SS Van Stone thermowell with 1" pipe OD, 0.260" ID,_|_[for 316 stainless steel.]_<br>_316SS Van Stone thermowell with 1" pipe OD, 0.260" ID,_|_316SS Van Stone thermowell with 1" pipe OD, 0.260" ID,_|
|---|---|---|---|---|
|_12" stem length, and a 10" insertion length._<br>**For Assistance in Choosing Head and Well Assemblies,**|**Other Dimensions (inch)**|||**Other Dimensions (inch)**|
|**See guide at omega.com. These wells are compatible with**<br>**OMEGA® NB1, NB2 (page B-8); PR-12, PR-14, and**||**Pipe**<br>**Size**|**Actual**<br>**Dia.**|**Raised**<br>**Face Dia.**|
|**NPT-style probes, as well as DialTemp™ Thermometers.**<br>**_†_ **_A Van Stone thermowell is an internal type flange thermowell_<br>_that withstands high pressure within a chamber and will prevent_<br>_the thermowell from “blowing” out. This type of connection requires_|_the thermowell from “blowing” out. This type of connection requires_|**Nominal**<br>1<br>11⁄2|**P**<br>1.315<br>1.900|**R**<br>2|
|_access into the existing process components._|||||



|**Well**<br>**Type**<br>a<br>~~Re~~|**Material**<br> <br>a<br>~~Re~~|**Insertion Length – “U”**|**Insertion Length – “U”**|**Insertion Length – “U”**|**Insertion Length – “U”**|**Insertion Length – “U”**|**Insertion Length – “U”**|**Insertion Length – “U”**|
|---|---|---|---|---|---|---|---|---|
|||**2**|**4**|**7**|**10**|**13**|**16**|**22**|
|260V<br>and<br> 260F<br>~~Re~~<br>~~es~~<br>~~Re~~|Carbon Steel<br>~~Re~~<br>~~es~~|404(129)<br>~~es~~|184(71.2)67.0<br>~~ss~~|67.0(42.7)34.0<br>~~ss~~|34.0|20.6|13.7|7.4|
||A.I.S.I. 304 & 316<br>~~Re~~<br>~~es~~<br>~~Re~~|430(179)<br>~~es~~|192(99.3)69.7<br>~~ss~~|69.7(59.6)35.4<br>~~ss~~|35.4|21.5|14.3|7.7|
||Monel<br>~~es~~<br>~~Re~~|350(143)<br>~~es ~~|168(79.8)<br> ~~ss~~|61(47.7)<br>~~ss~~|31.0|18.8|12.5|6.7|
|385V<br>and<br> 385F<br>~~Re~~<br>~~po~~<br>~~GC~~<br>~~a~~|Carbon Steel<br>~~Re~~<br>~~po~~|410(152)<br>~~po~~|248(84.3)91.3<br>~~po~~|91.3(50.6)45.7<br>~~po~~|45.7<br>~~po~~|27.6<br>~~po~~|18.5 10.0<br>~~po~~|18.5 10.0<br>~~po~~|
||A.I.S.I. 304 & 316<br>~~GC~~|444(211)<br>~~GC~~|258(117)95.2<br>~~GC~~|95.2(70.3)47.6<br>~~GC~~|47.6<br>~~GC~~|28.8<br>~~GC~~|19.3 10.4<br>~~GC~~|19.3 10.4<br>~~GC~~|
||Monel<br>~~a~~|338 (168)|226 (93.3) 83.3 (56.0) 41.6|226 (93.3) 83.3 (56.0) 41.6|226 (93.3) 83.3 (56.0) 41.6|25.2|16.9|9.1|



## **Maximum Fluid Velocity—feet per second** 

_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._ 

**B-29**