This is a vacuum valve made by Huntington Vacuum, model MV-150.
This is in very good used condition.
304 stainless steel construction
Pressure range: ATM to 1x10-13 Torr
Tube OD in: 1.5"
Tube ID in: 1.37"
2.75" CF conflat flanges
Both flanges rotatable
Specifications:
MFG: Huntington Vacuum
Model: MV-150