The actual product may differ slightly from the image.
These gauge connecting unions allow comfortable and safe assembly of pressure gauges in pipe systems ranging from DN3 to DN10. The versions for different pressure ranges and thread types cover all standard requirements.
On request, the suitable copper seals are available as optional accessories.
Advantages & functions
- For reliable connection of gauges
- Available in pressure ranges of PN 100, 200 and 320 bar
- Suitable for G ¼“, G ½“ gauge threads and all commercial types
- Available in DN 3 to DN 10 tube diameters
- Other thread diameters are available on request
- Also available in other DIN EN materials
M1M-G Series for pressures up to PN 100:
M1M-G series for G ¼ gauge thread:
DN | d1 | s | d3 | d4 | L10 | l10 | i5 | s3 | s8 | Order number |
8 | 10 | 1,5 | M 18x1,5 | G ¼ | 54 | 29 | 13 | 22 | 19 | M1M 8 / 59 |
10 | 12 | 1,75 | M 20x1,5 | G ¼ | 56 | 29 | 13 | 24 | 24 | M1M 10 / 59 |
M1M-G series for G ¼ gauge thread:
DN | d1 | s | d3 | d4 | L10 | l10 | i5 | s3 | s8 | Order number |
4 | 6 | 1,25 | M 14x1,5 | G ½ | 53 | 32 | 16 | 17 | 24 | M1M 4 / 51 |
6 | 8 | 1,5 | M 16x1,5 | G ½ | 55 | 32 | 16 | 19 | 24 | M1M 6 / 51 |
8 | 10 | 1,5 | M 18x1,5 | G ½ | 59 | 34 | 16 | 22 | 24 | M1M 8 / 51 |
10 | 12 | 1,75 | M 20x1,5 | G ½ | 61 | 34 | 16 | 24 | 24 | M1M 10 / 51 |
M2M-G Series for pressures up to PN 200:
DN | d1 | s | d3 | d4 | L10 | l10 | i5 | s3 | s8 | Order number |
3 | 6 | 1,5 | M 14x1,5 | G ½ | 57 | 32 | 16 | 19 | 27 | M2M 3 / 51 |
4 | 8 | 2 | M 16x1,5 | G ½ | 57 | 32 | 16 | 22 | 27 | M2M 4 / 51 |
6 | 10 | 2 | M 18x1,5 | G ½ | 57 | 32 | 16 | 22 | 27 | M2M 6 / 51 |
8 | 12 | 2 | M 20x1,5 | G ½ | 61 | 34 | 16 | 24 | 27 | M2M 8 / 51 |
10 | 13,5 | 1,75 | M 22x1,5 | G ½ | 65 | 34 | 16 | 27 | 27 | M2M 10 / 51 |
M3M-G Series for pressures up to PN 320:
DN | d1 | s | d3 | d4 | L10 | l10 | i5 | s3 | s8 | Order number |
3 | 6 | 1,5 | M 14x1,5 | G ½ | 57 | 32 | 16 | 19 | 27 | M3M 3 / 51 |
4 | 8 | 2 | M 16x1,5 | G ½ | 57 | 32 | 16 | 22 | 27 | M3M 4 / 51 |
5 | 10 | 2,5 | M 18x1,5 | G ½ | 57 | 32 | 16 | 24 | 30 | M3M 5 / 51 |
6 | 12 | 3 | M 20x1,5 | G ½ | 64 | 35 | 16 | 27 | 30 | M3M 6 / 51 |
8 | 13,5 | 2,75 | M 22x1,5 | G ½ | 66 | 35 | 16 | 30 | 30 | M3M 8 / 51 |
10 | 16 | 3 | M 24x1,5 | G ½ | 73 | 38 | 16 | 32 | 30 | M3M 10 / 51 |
M6M Series for pressures up to PN 640:
DN | d1 | s | d3 | d4 | L10 | l10 | i5 | s3 | s8 | Order number |
8 | 13,5 | 2,75 | M 26x1,5 | G ½ | 75 | 40 | 16 | 36 | 32 | M6M 8 / 51 |
M10M Series for pressures up to PN 1000:
DN | d1 | s | d3 | d4 | L10 | l10 | i5 | s3 | s8 | Order number |
8 | 17 | 4,5 | M 30x2 | G ½ | 102 | 52 | 16 | 41 | 36 | M10M 8 / 51 |
For orders on individual parts we need the following information:
Pieces | Component | Designation | Order number | Material number |
1 | 1 | Weld-on stub | (Series)-(DN)- 1 | ___________________ |
1 | 2 | Clamping nut | (Series)-(DN)- 2 | ___________________ |
1 | 51 | Gauge connection piece | (Series)-(DN)- 51 | ___________________ |
Technical data
| Nominal pressure (in bar) | 100 PN | |
| Nominal width (in mm) | 10 DN | |
| Outer diameter of welding nozzle | 12 mm | |
| Wandstärke | 1.75 mm | |
| d3 | M 20x1.5 | |
| d4 | G ½ | |
| L10 | 61 mm | |
| l10 | 34 mm | |
| i5 | 16 mm | |
| s3 | 24 Wrench size | |
| s8 | 24 Wrench size | |
| Material according to DIN EN | 1.0460 | |
| Material description | Steel |
Technical drawing
