- Excellent roundness and surface precision of the sealing surface make it suitable for high-vacuum use.
- Highly precise threads allow smooth opening and closing with a light touch.
- The core rod is replaceable for easy maintenance.
- The tolerance of glass tube L1 and L2 is ±5 mm.
| code | Model | Branch diameter | L1–L2 dimensions |
| 7027-01 | GTV-8L | 8×5 | 85–80 |
| 7027-02 | GTV-10L | 10×7 | |
| 7027-03 | GTV-12L | 12×9 | 85–80 |
| 7027-04 | GTV-15L | 15×11 | |
| 7027-05 | GTV-19L | 19×14 | 85–90 |
| 7027-06 | GTV-24L | 24×19 |












