Circular sight glass fitting type 391 PN 16/40 - pipe assembly
for welding on pipelines
Tank sight glass PN 16 | PN 25 | PN 40
- 100
- 125
- 150
- 200
- 300
- 350
- 16
- 25
- 40
- 80°C
- 130°C
- 150°C
- 175°C
- 180°C
- 200°C
- 280°C
- 300°C
- 320°C
- 400°C
- Wiper SGW with PTFE or silicone wiper blade
- LED light for Ex and non-Ex areas
- FEP or Halar® coating
- Mica protection
- Custom made design
Quick overview
DN 100 - 350
Cross-section
drawing
| DN | 100 | 125 | 150 | 200⁴ | 300⁵ | 350⁵ |
|---|---|---|---|---|---|---|
| Diameter [mm] (PN 16) | 220 | 250 | 285 | 340⁴ | 460⁵ | 520⁵ |
| Weight [kg]² (PN 16) | 10.5 | 14.5 | 18.6 | 28.2 | 55.7 | 78 |
| Diameter [mm] (PN 25/40) | 235 | 270 | 300 | 375 | - | - |
| Weight [kg]³ (PN 25/40) | 14.8 | 21.1 | 27.5 | 52.6 | - | - |
| Inner diameter [mm] | 107 | 132 | 160 | 207 | 310 | 340 |
| Length [mm] (Standard) | 70 | 70 | 70 | 70 | 70 | 70 |
| s [mm] | 3.6 | 4 | 4.5 | 6.3 | 7.1 | 8 |
| A [mm] | 114.3 | 139.7 | 168.3 | 219.1 | 232.9 | 355.6 |
| ² If applicable smaller or larger, depending on size of D and L | ||||||
Product information
The ACI sight glass type 391 is a round sight glass with a pipe attachment specifically for installation on a media-conducting line or a sharply curved tank. Between two high-quality stainless steel flanges and proven quality gaskets, a sight glass made of chemically highly resistant borosilicate glass DIN 7080 is clamped.
Our sight glasses type 391 are made from high-quality stainless steel 1.4571 (316Ti), which 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 is done with flat seals tailored to your needs from a wide range of materials. This offers, in addition to the common fiber material seals, 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 protective shield specially adapted for the fitting offers additional protection against temperature and steam. FEP or Halar® coatings additionally protect the borosilicate glass from aggressive chemicals or caustics.
Like other sight glass fittings, type 391 can be equipped with a sight glass wiper type SGW and lights upon request.
- Screws
- Cover flange
- Glass cushion
- Sight glass
- Gasket
- Base flange with pipe attachment
- Nuts
