Products

Circular Sight Glass Fittings

DIN28120

DN150 polished Ra<0.8μm thickness 60mm
Kessler Schauglas DIN28120 Zeichnung

Circular Sight Glass

Circular Sight Glass

DIN 28120

Round sight glasses according to DIN 28120 are used for the reliable visual monitoring of fill levels and processes in containers and equipment. The standardized round glass panes are inserted into suitable sight glass fittings and are designed for use in pressure vessels.

Sizes:

Sizes:

DN

Nominal pressure

View

Base flange

Cover flange

glass

bar

⌀ O

Ø OD

F

A

⌀ G

E

25

16

48

115

25

16

63

10

40

16

65

150

30

16

80

12

50

16

80

165

30

16

100

15

80

10 / 16

100

200

30

20

125

15 / 20

100

10 / 16

125

220

30

22

150

20 / 25

125

10 / 16

150

250

30

25

175

20 / 25

150

10 / 16

175

285

36

30

200

25 / 30

200

10

225

340

36

35

250

30

DN

Nominal pressure

View

Base flange

Cover flange

glass

bar

⌀ O

Ø OD

F

A

⌀ G

E

25

16

48

115

25

16

63

10

40

16

65

150

30

16

80

12

50

16

80

165

30

16

100

15

80

10 / 16

100

200

30

20

125

15 / 20

100

10 / 16

125

220

30

22

150

20 / 25

125

10 / 16

150

250

30

25

175

20 / 25

150

10 / 16

175

285

36

30

200

25 / 30

200

10

225

340

36

35

250

30

Quick overview:

Quick overview:

max. 16 bar

heat-resistant up to 243°C

for liquid media

for gaseous media

Frame sizes up to
Ø 275 mm

Custom-made products possible

>50 sealing materials

Accessories available

Technical data:

Kessler DIN28120 Schauglasarmatur Zeichnung

Operating pressure

10 / 16 bar

Base frame

1.4404 / 1.4571 / 1.4435 / 1.4462 / 1.4541 / 1.4306 / 1.4539 / 2.4602 Hastelloy C22

On request with APZ DIN EN 10204-3.1

Cover flanges

1.4306 / 1.4404 / 1.4541 / 1.4571

On request with APZ DIN EN 10204-3.1

Sight glass disc

Borosilicate glass according to DIN 7080 up to 243°C

also with a wiper up to 6 bar

Bolts / Nuts

Stud bolts: DIN 938 and nuts: ISO 4032 A2-70 or A4-70

Gaskets

PTFE, EPDM, Klingersil® C-4400, Reinz AFM 34, Silicone, Garlock GYLON®

Available with USP Class VI certification on request

*Other available on request

Why Kessler?

Why Kessler?

Why Kessler?

01

Decades of experience in plant engineering

02

Precision “Made in Germany”

03

Tailor-made special solutions

04

Reliable under pressure and temperature

05

Compatibility with common standards and norms

06

Fast availability and short delivery times

Product images

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Request a consultation

Tell us about your project — whether small or large.

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Managing Director

Contact request

By submitting this form, you agree to our privacy policy.

Request a consultation

Tell us about your project — whether small or large.

Your personal contact:

Martin Kessler

Managing Director