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For welding in or on similar to DIN 28120
For pressureless applications up to max. 0.49 barg
Non binding • Usually a response within 24 hours
Our round sight glasses type 317 (PN 0) are welded onto or into a container wall to allow observation or lighting of the inside of the container. ACI sight glasses of type 317 were designed, based on DIN 28120, as a lightweight version for pressureless operation. A sight glass made of chemically highly resistant borosilicate glass DIN 7080 (or according to customer requirements) is clamped between two high-quality stainless steel flanges and proven quality seals.
Type 317, unlike types 318 and 320, is not designed as a pressure-retaining construction, but as a pure sight opening. This makes type 317 significantly lighter and flatter than other commercially available sight glasses.
Despite the lower requirements, our sight glasses of type 317 are made from the same high-quality stainless steel 1.4571 (316Ti) that our customers have appreciated for years. As glass material, the industry-proven borosilicate glass according to DIN 7080 (or according to customer requirements) is used. The sealing of the fitting occurs with flat seals adapted to your needs from a wide range of materials. In addition to the common fiber material seals, this also offers more demanding 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 pose a problem even for the highly resistant borosilicate glass, a mica protection cover specifically designed for the fitting offers additional protection against temperature and steam. FEP or Halar® coatings additionally protect the borosilicate glass from aggressive chemicals or alkalis.
Like other sight glass fittings, type 317 can be equipped with a wiper type SGW, spray devices SVIII, or lamps upon request.
| DN | 50 | 80 | 100 | 125 | 150 | 200 | 300 | 400 |
|---|---|---|---|---|---|---|---|---|
| Da [mm] | 140 | 165 | 190 | 215 | 240 | 290 | 370 | 450 |
| Di [mm] | 80 | 100 | 125 | 150 | 175 | 225 | 300 | 370 |
| h1 [mm] | 10 | 10 | 10 | 10 | 10 | 10 | 15 | 20 |
| h2 [mm] | 15 | 15 | 15 | 15 | 15 | 15 | 20 | 25 |
| Weight [kg] | 2,0 | 2,8 | 3,2 | 4,3 | 5,1 | 6,8 | 12,2 | 23,0 |
