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Glass-ring tubular sight glass Type 641 PN 25/40
SKU: MG-641
Glass-ring tubular sight glass type 641 as a compact intermediate-flange design for DIN flanges. For PN 25/40, DN 10–125, up to 40 barg and 280 °C.
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Glass-ring tubular sight glass type 641 as a compact intermediate-flange design for DIN flanges. For PN 25/40, DN 10–125, up to 40 barg and 280 °C.
Technical data
Drawing & dimensions

Glass-ring tubular sight glass Type 641 PN 25/40
| Dimension | DN 10 | DN 15 | DN 20 | DN 25 | DN 32 | DN 40 | DN 50 | DN 65 | DN 80 | DN 100 | DN 125 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Di [mm] | 14 | 18 | 22 | 29 | 38 | 44 | 55 | 71 | 83 | 108 | 132 |
| Da [mm] | 40 | 45 | 58 | 68 | 79 | 88 | 102 | 122 | 138 | 158 | 188 |
| Weight | 0,13 | 0,16 | 0,27 | 0,36 | 0,46 | 0,56 | 0,71 | 0,94 | 1,16 | 1,27 | 1,71 |
| Weight | 0,07 | 0,08 | 0,13 | 0,18 | 0,22 | 0,27 | 0,34 | 0,46 | 0,56 | 0,62 | 0,83 |
| PS | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 25 | 25 | 25 | 20 |
| PS | 25 | 25 | 25 | 25 | 20 | 20 | --- | --- | --- | --- | --- |
* All dimensions in mm unless specified.
- Borosilicate glass Acrylic glass Weight in [kg] for L = 50 mm max. Working pressure in [barg] Other materials, sizes, lengths and flange standards on request
Fitting Component Assembly Structure
- 1V-flange Type 11 according to DIN EN 1092-1
- 2Gasket
- 3Glass-ring tubular sight glass Type 641
- 4Gasket
- 5V-flange Type 11 according to DIN EN 1092-1
Quick overview
Nominal sizes DN
10 · 15 · 20 · 25 · 32 · 40 · 50 · 65 · 80 · 100 · 125
Nominal pressure PN
25 · 40
Temperature
80°C · 130°C · 150°C · 175°C · 180°C · 200°C · 280°C
