Van Stone Thermowells for 1/4" and 3/8" Diameter Elements
Series 260V / 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 on request.

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

All dimensions in inches
* NPSM internal pipe thread will accept both NPT and NPS male threads.

To Order
(Specify Model No.) Prices Shown in U.S. Dollars
Model No. Element Length A Insertion Length U Shank Dia. Q Bore Diameter B
1-260V-U 2 ( )
4
2
3/4
.260
1-260V-U 4 ( )
6
4
3/4
.260
1-260V-U 7 ( )
9
7
3/4
.260
1-260V-U 10 ( )
12
10
3/4
.260
1-260V-U 13 ( )
15
13
3/4
.260
1-260V-U 16 ( )
18
16
3/4
.260
1-260V-U 22 ( )
24
22
3/4
.260
-
1-385V-U 2 ( )
4
2
7/8
.385
1-385V-U 4 ( )
6
4
7/8
.385
1-385V-U 7 ( )
9
7
7/8
.385
1-385V-U 10 ( )
12
10
7/8
.385
1-385V-U 13 ( )
15
13
7/8
.385
1-385V-U 16 ( )
18
16
7/8
.385
1-385V-U 22 ( )
24
22
7/8
.385
( ) Material – 304 SS, Carbon Steel, etc.

To order, please specify:
1.
Complete Model Number
2. Material
3. Flange Size
4. Backing Flange Pressure Desired
Other Dimensions (in)
Pipe Size Nominal
Actual Dia. P
Raised face R
1
1 1/2
1.315
1.900
2
2 7/8

CONTINUED
Model # Materials & Prices Model # Materials & Prices
Stainless Steel
304
Stainless Steel
316
Stainless Steel
304
Stainless Steel
316
1-260V-U 2
$84.00
$104.00
1-385V-U 2
$84.00
$104.00
1-260V-U 4
$96.00
$129.00
1-385V-U 4
$96.00
$129.00
1-260V-U 7
$114.00
$153.00
1-385V-U 7
$114.00
$153.00
1-260V-U 10
$132.00
$177.00
1-385V-U 10
$132.00
$177.50
1-260V-U 13
$150.00
$202.00
1-385V-U 13
$150.00
$202.00
1-260V-U 16
$168.00
$226.00
1-385V-U 16
$168.00
$226.00
1-260V-U 22
$205.00
$275.00
1-385V-U 22
$205.00
$275.00

Maximum Fluid Velocity—feet per second - Introduction to Thermowells
Well Type Material Insertion Length - "U"
2 4
7
10 13 16 22
260V and 260F
Carbon Steel
404 (129)
184 (71.2)
67.0 (42.7)
34.0
20.6
13.7
7.4
A.I.S.I. 304/316
430 (179)
192 (99.3)
69.7 (59.6)
35.4
21.5
14.3
7.7
Monel
350 (143)
168 (79.8)
61 (47.7)
31.0
18.8
12.5
6.7
385V and 385F
Carbon Steel
410 (152)
248 (84.3)
91.3 (50.6)
45.7
27.6
18.5
10.0
A.I.S.I. 304/316
444 (211)
258 (117)
95.2 (70.3)
47.6
28.8
19.3
10.4
Monel
338 (168)
226 (93.3)
83.3 (56.0)
41.6
25.2
16.9
9.1
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.

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