A stainless steel industrial valve with flanged ends and bolts, featuring a transparent window for visibility inside.

Stainless steel pipe fitting with flanges and threaded connections.

Metal flange pipe fitting with a circular opening and bolt holes for secure attachment.

Video | Flow sight glass type 550 – ACI Industriearmaturen GmbH

Flow sight glass type 550 PN 16/40 - DIN 11869 (old DIN 3237)

With flange connections according to DIN 1092-1

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Available from stock

Flow sight glass PN 10 | PN 16 | PN 25 | PN 40

Certified quality

Technical data

Nominal sizes DN

15
20
25
32
40
50
65
80
100
125
150
200

Nominal pressure PN

10
16
25
40

Temperature

80°C
130°C
150°C
175°C
180°C
200°C
280°C
300°C
320°C
400°C

Options

Wiper SGW with PTFE, silicone, or EPDM wiper blade
LED light for Ex and non-Ex areas
Spraying device
FEP or Halar® coating
Mica protection disc
PTFE rotor
Oil and grease-free design
Silicone-free execution including crater test

Execution

DN 15 – 50 Rectangular cover flanges
DN 65 – 200 Circular cover flanges

Datasheet Info brochure To the Pressure-temperature rating

Flow sight glass type 550 – ACI Industriearmaturen GmbH

Product information

The ACI flow sight glass type 550 is a robust sight glass for industrial applications. The body is made of high-quality stainless steel casting 1.4408, which ensures excellent corrosion resistance as well as high mechanical strength. The design is intended for installation between DIN EN 1092-1 flanges and allows the visual monitoring of media in pipelines under working pressure.

The type 550 is manufactured in accordance with DIN 11869 (formerly DIN 3237). Upon request, versions in other materials and alloys are also available, e.g., 1.0619 (cast steel) or Alloy C22, according to your specification.

Flange connections:
As standard, the sight glass is supplied with flanges according to DIN EN 1092-1 PN 10/16/25/40.

Gasket system:
The gasket is achieved via proven flat gaskets from leading manufacturers, including:

Frenzelit novaphit® MST XP
KlingerSil® C4400
Garlock Gylon®
PTFE (pure or modified)
Over 50 other gasket materials available upon request

Optional protective coatings for the sight glass:
For increased thermal and chemical loads, the sight glasses can be equipped with the following protective layers:

HALAR® coating
FEP coating
Mica protection disc

Additional equipment (factory-integratable):

Sight glass wiper type SGW (with wiping blades made of PTFE, silicone, or EPDM)
Spraying devices for cleaning
LED lights, also available with ATEX certification for explosion-prone areas upon request

Cross-section
drawing

A simple black outline of a cat sitting with its tail curved.

Dimensions

DN	15	20	25	32	40	50	65	80	100	125¹	150¹	200¹
D (PN16)	95	105	115	140	150	165	185	200	220	250	285	340
D (PN25)	95	105	115	140	150	165	185	200	235	270	300	360
D (PN40)	95	105	115	140	150	165	185	200	235	270	300	375
BL	130	150	160	180	200	230	290	310	350	400	480	600
D1	32	32	48	48	65	80	80	100	125	150	175	175
1) According to DIN 11869

Quick overview

max. 40 barg

-196°C to 400°C

for liquid media

for gaseous media

Nominal sizes
DN 15 - 200

> 50 gasket materials

Accessories available

TÜV pre-tested

Would you like personal advice?

Benefit from our expert knowledge in process monitoring. Our experienced team will provide you with sound advice when selecting the ideal sight glass fittings for your specific requirements. Schedule your personal consultation now!

Dirk Göttgens

Executive management

0049 (0) 2461 91634 00

dg@aci24.com

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