Glass tube-
sight glass

Glass tube-
sight glass

KL 323

Glass tube sight glass fitting for connection to flanges according to DIN 2633.
For observing flows and fill levels in pipelines.

Sizes:

Sizes:

Connecting flange
DIN 2633

Sight glass

⌀ F

Standard overall length
DIN 3202 F1

NW

⌀ D

⌀ PCD

Ø OD

Ø ID

15

95

65

22.0

17.0

50.0

130

20

105

75

28.0

22.4

58.0

150

25

115

85

36.0

30.4

68.0

160

32

140

100

46.0

39.6

78.0

180

40

150

110

54.0

47.0

88.0

200

50

165

125

70.0

61.6

102.0

230

65

185

145

85.0

75.0

122.0

290

80

200

160

100.0

90.0

138.0

310

100

220

180

120.0

106.0

162.0

350

125

250

210

On request

150

285

240

On request

200

340

295

On request

Connecting flange
DIN 2633

Sight glass

⌀ F

Standard overall length
DIN 3202 F1

NW

⌀ D

⌀ PCD

Ø OD

Ø ID

15

95

65

22.0

17.0

50.0

130

20

105

75

28.0

22.4

58.0

150

25

115

85

36.0

30.4

68.0

160

32

140

100

46.0

39.6

78.0

180

40

150

110

54.0

47.0

88.0

200

50

165

125

70.0

61.6

102.0

230

65

185

145

85.0

75.0

122.0

290

80

200

160

100.0

90.0

138.0

310

100

220

180

120.0

106.0

162.0

350

125

250

210

On request

150

285

240

On request

200

340

295

On request

Quick overview:

Quick overview:

max. 40 bar(g)

heat-resistant up to 400 °C

for liquid media

for gaseous media

Overall lengths 140–1000 mm

Custom-made products possible

>50 sealing materials

Accessories available

Technical data:

Operating pressure

2.5 bar

Cover flanges

1.4404 / 1.4571

Housing flanges

DIN 2576 PN 10 or
DIN EN 1092-1 Type 01
1.4301 / 1.4541

Standard overall length

DIN 3202 F1
other installation lengths on request

glass tube

Borosilicate glass Schott Duran

Gaskets

Viton O-rings

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

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

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