L.J. Engineering 329DPSR Self-Relieving Vacuum Regulator, .3-1.5 inHg 1/2" NPT
Operating Range:
Minimum Differential Vacuum: 0.30 inHg (7.62 mm Hg)
Minimum Absolute Pressure: 0.40 inHg (10.16 mm Hg)
Maximum Vacuum Setting: 1.50 inHg (38.10 mm Hg)