UNKJ 018

Thermowells are designed for temperature sensors protection from mechanical or chemical impact of working medium at pipelines, tanks and units with heat insulation.
Thermowell immersion part is solid. Material: SMF – steel 12Cr1MoWo or S10 – steel 12Cr18Ni10Ti, complete list of available materials is given in the table No.1, section "UNKJ thermowells".
Thermowell structure allows to replace sensor without thermowell dismantling. Sensor terminal head can be moved away from pipeline or unit heat insulation.

Technical characteristics
Temperature range

Modification

Nominal
pressure (PN), MPa

Thermowell
diameter, mm

max Ø                   sensor, mm

Thermowell immersion length U, mm

Probe length
L*, mm

from

to

UNKJ 017

80

35

3

100

320

320, 400, 500

UNKJ 018

80

35

8

* other length is available, specify while ordering.

Modification

Recommended thermocouples

UNKJ 017

  • CTxx 01.03 3mm diameter
  • If mounting fitting UNKJ 038 or movable fitting UNKJ 031 is used; CTxx 01.02 3mm diameter

 

UNKJ 018

  • CTxx 01.10 8mm diameter
  • RTх 101 8mm diameter
  • RTх 103
  • PRTD 105
  • If mounting fitting UNKJ 038 or movable fitting UNKJ 031 is used; RTxx 102 ≤8mm diameter, PRTD 106.
Execution options

UNKJ

 

017

-

55

.

А

.

800

-

G1/2

.

G

-

S10

-

35

-

500

/

320

1

 

2

 

3

 

4

 

5

 

6

 

7

 

8

 

9

 

10

 

11

 

Field no.

Structure

Field code

Designation

1

Manufacturer's code

UNKJ

 

2

Thermowell modification number

017

Solid thermowell, weld-in, with thinning up to 3.5 mm

018

Solid weld-in thermowell

3

Connection size

55

Mounting seat diameter 55mm

4

Design depending on thermowell seal at site

A

version A typical

5

Nominal pressure

800

nominal (rated) pressure in kgf/cm2

6

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

 

for movable fitting (field is not filled)

G

for fixed fitting

8

Immersion end material

S10

steel 12Cr18Ni10T

Smf

steel 12Х1МФ

9

Working end outer diameter

35

dimensions in mm

10

sensor length L

320, 400, 500

dimensions in mm

11

Immersion length U

100-320

dimensions in mm

 

Examples of product designation

UNKJ 017-55.А.800-S10-35-400/120-thrermowell, modification 018, thread М20х1,5 for sensor with movable fitting. Thermowell material S10 (12Cr18Ni10Т), working end diameter 35 mm, fitting length 400 mm, immersion length 120 mm.

UNKJ 018-55.А.800-G1/2-S10-35-500/320-thermowell, modification 018, thread G1/2 for sensor with movable fitting. Thermowell material S10 (12Cr18Ni10Т), working end diameter 35 mm, fitting length 500 mm, immersion length 320 mm.