UNKJ 026

Thermowells are designed for temperature sensors protection from mechanical or chemical impact of working medium in pressurized vessels, pipelines and other units, in which additional sensor protection is required.
UNKJ 014, 114, 016, 026 thermowells are solid. Standard thermowell material: S10 – steel 12Cr18Ni10Т, S08 – 08Cr18Ni10Т or S13 – 10Cr17Ni13М2Т, complete list of available materials are given in the table No.1, section "UNKJ thermowells". UNKJ 032 nipple is recommended for terminal head removal from excessive heat impact area.
Weldolets UNKJ 034, UNKJ 035, UNKJ 036 (see "UNKJ units and components" section) are available for thermowell connection to machines, devices, vessels and tanks.

Technical characteristics
Temperature range

Modification

Pressure
nominal РN, MPa (kgf/cm2)

Connection thread M

D, mm

d, mm

max Ø                   sensor, mm

Thermowell  insertion length L, mm

Thermowell immersion length U, mm

from

to

UNKJ 014*

20 (200)

  • Metric, according to GOST 24705, M12 to M33
  • Straight pipe, according to GOST 6357, G3/8 to G1
  • Tapered according to GOST 6111, К1/4 to К1”

14

10

120

1250

 

 

U=L
for thread
М12 – М33
and
G3/8 - G1

 

U=L-13…19

for thread
К1/4 to К1

32 (320)

16

10

40 (400)

14

8

50 (500)

8

3.5

80

500

10

4.5

12

6

120

800

16

8

1250

18

10

UNKJ 114

32 (320)

М20х1,5; М27х2; М33х2; G1/2; G3/4; G1; К1/2”; К3/4”; К1”

20

12.5

8

120

1250

40 (400)

22

17.5

10

UNKJ 016

50 (500)

М27х2; G3/4

23

8

80

1250

K3/4”

22

М33х2; G1

29

K1”

28

UNKJ 026

32 (320)

М27х2; G3/4

23

10

80

1250

K3/4”

22

50 (500)

М27х2; G3/4

23

8

K3/4”

22

М33х2; G1

29

10

K1”

28

* - for UNKJ 014 it is possible to produce thermowells with different dimensions «D» and «max sensor Ø».

Execution options

UNKJ

 

014

-

27

.

B

.

200

-

G1/2

.

G

-

S13

.

S

-

20

-

630

/

100

1

 

2

 

3

 

4

 

5

 

6

 

7

 

8

 

9

 

10

 

11

 

12

 

Field no.

Structure

Field code

Designation

1

Manufacturer's code

UNKJ

 

2

Thermowell modification number

014; 114

Solid cylinder thermowell with constant  (014) or variable (114) diameter

016

Solid taper thermowell (variable diameter drilling for a sensor, maximum diameter 8mm)

026

Solid taper thermowell (constant diameter drilling for a sensor, maximum diameter 10mm)

3

 

Mounting thread M
Гильза

12; 16; 18

М12х1,5; М16х1,5; М18х1,5 according to GOST 24705

20

М20х1,5according to GOST 24705

27

М27х2according to GOST 24705

33

М33х2according to GOST 24705

G1/2; G3/4; G1

straight pipe thread GOST 6357

K1/2; K3/4; K1

British taper thread GOST 6111

4

Design depending on thermowell seal at site

A

A version (according to GOST 10549)

B

B version (according to GOST 22526)

C

C version for weldolet  installation according to OST 26.260.460-99

5

Nominal pressure

1 to 500

nominal (rated) pressure in kgf/cm2

6

Гильза

Inner thread N for sensor

 

М20х1,5 – not specified

G1/2;

straight pipe thread GOST 6357

K1/2;

British taper thread, GOST 6111 only for installation of sensors with fixed fitting.

7

Design depending on sensor seal inside thermowell, table 3

 

for movable fitting (field is not filled)

G

for fixed fitting

8

Immersion end material*

S10

steel 12Cr18Ni10T

S08

steel 08Cr18Ni10Т;

S13

steel 10Cr17Ni3M2T

Smf

steel 12Х1МФ

S316

AISI 361Ti

М400

Monel 400

I825, I800

Incoloy 825, Incoloy 800

Т904, Т446

AISI 904L, AISI 446

Т310, Т600, Т625

AISI 310S, Inconel 600, Inconel 625

H276, H22

Hastelloy C-276, Hastelloy C-22

9

Thermowell coating - yes/no

 

without coating (field is not filled)

S

wear-resistant and corrosion-resistant coating

10

Working end outer
diameter

D

size (mm), should be specified only for UNKJ 014, 114.

11

Sensor
length

L

Distance from sealing face, mm It is recommended to be selected from standard range, GOST 6636-69

12

Coating length

l

field is not filled if thermowell without coating is used.

* at the time of order please specify whether it is possible to produce thermowell from other materials given in table 1

Examples of product designation

UNKJ 014-20.А.200-S10-14-630 thermowell, modification  014, mounting thread М20х1,5, sealing surface, version А (according to GOST 10549). Nominal pressure 200 kgf/cm2 (20 MPa). Thread for М20х1,5 sensor with movable fitting by default. Material -  S10 (12Cr18Ni10Т), working end diameter 14 mm, fitting length 630 mm.

UNKJ 016-27.В.500-S10-300 thermowell modification 016, mounting thread М27х2, sealing surface, version В (according to GOST 22526). Nominal pressure 500 kgf/cm2 (50 MPa). Thread for М20х1,5 sensor with movable fitting by default. Fitting and tube material S10 (12Cr18Ni10Т), insertion length  300 mm.

UNKJ 014-27.B.320-G1/2Н-S13.S-20-1250/500 thermowell, modification 014, mounting thread М27х2, sealing surface version B (according to GOST 22526). Nominal pressure 320 kgf/cm2 (32 MPa). G1/2 thread for a sensor with fixed fitting. Material -  S13 (10Cr17Ni13МТ), thermowell with coating (S), working end diameter 16 mm, fitting length 1250 mm, coating length 500 mm.