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This kind of valve is used on fermenter.
There is no glycerinum in the pressure gauge based on Express rule, but it works well without it, and it is easy to add the glycerinum.
50.5mm clamp flange (1.5" clamp ferrule in inch).
11/4" pipe outter diameter.
The max pressure often we make is 2.2bar.
Let me know pressure you pls if 2.2bar is not ok for you, it can be customized.