The vent valve design has been upgraded on the T-900 Series and the Vernier function now operates differently from the previous generation. The new vent design has a reverse thread to allow for proper Vernier operation and also for operation of the vent which is now an o-ring seal and not a metal seat seal. If the valves are not properly used, one will be opened when the other is tightened and the pressure will be relieved.
25 in Hg (Vacuum) to 580 PSI
Precision Vernier built into the handle for fine adjustment
Controlled bleed valve for precise pressure reduction and hysteresis tests