A circular metal flange with a central glass window, featuring four hexagonal bolt holes around the edge.

A stainless steel flange with a threaded interior and hexagonal bolts for secure attachment.

A metallic mechanical component with a threaded interior and smooth exterior, likely used for joining or connecting parts in machinery.

Circular sight glass fitting type 394 PN 16/160

with female thread for screwing on

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Delivery time on request

Tank sight glass PN 16 | PN 40 | PN 63 | PN 100 | PN 160

Non binding • Usually a response within 24 hours

Certified quality

Technical data

Product information

The screwed sight glass type 394 is fitted with an internal thread on the connection side.

Our tank sight glasses type 394 are made of high-quality stainless steel 1.4571 (316Ti), which our customers have appreciated for years. The glass material used is the industry-proven borosilicate glass according to DIN 7080 (or according to customer specifications).

The sealing of the fitting is done with flat seals customized to your needs from an extensive range of materials. This includes not only common fiber material seals but also more sophisticated materials such as PTFE (Teflon®), NBR, novaphit® MST-XP, KlingerSil® C4400, and many other branded seals.

If the maximum operating temperature of borosilicate glass DIN 7080 does not meet your requirements, or if the process conditions themselves pose a problem for the highly resistant borosilicate glass, a special mica protection screen adapted for the fitting offers additional protection against temperature and steam. FEP or Halar® coatings additionally protect the borosilicate glass against aggressive chemicals or alkalis.

As with other sight glass fittings, the type 394 can be optionally equipped with a sight glass wiper type SGW.

Screws
Cover flange
Glass cushion
Sight glass
Gasket
Base flange with threaded connection

Diagram of a mechanical assembly showing two bolts, a flange, gaskets, and a spacer, labeled with numbers for identification.

Cross-section
drawing

Dimensions

PN	G	Da [mm]	Di [mm]	L [mm]	Weight [kg]
16	½“	70	15	20	0.8
	1“	95	25	20	1.5
	1½“	110	40	20	2.2
	2“	110	40	20	2.1
40	½“	70	15	20	0.8
	1“	95	25	20	1.5
	1½“	110	40	20	2.2
	2“	110	40	20	2.2
63	½“	95	15	20	0.8
	1“	95	25	20	1.5
	1½“	like PN 100
	2“	like PN 100
100	½“	70	15	20	0.8
	1“	95	25	20	1.5
	1½“	110	40	20	2.2
	2“	110	40	20	2.2
160	½“	70	15	20	0.8
	1“	95	25	20	1.8
	1½“	110	40	20	2.6
	2“	110	40	20	2.7
Other sizes and pressure ratings on request
Installation via hook wrenches as for DIN 11851

Quick overview

max. 160 barg

heat resistant up to 280 °C

for liquid media

for gaseous media

Nominal sizes
½" - 2"

Custom designs possible

> 50 sealing materials

Accessories available

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!

Frederic Glöde

Sales Director

0049 (0) 2461 91634 00

fg@aci24.com

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