50-2 Operating the Vacuum Excavator VX30/VX50 Gen3/ECO50 Vacuum Excavators
Pressure Relief Valves
The system includes a Pressure Relief valve (2), preset to relieve positive system
pressure at 5 psi (34 kPa).
Vacuum Relief Valves
The system includes a Vacuum Relief valve (3) preset to relieve vacuum (negative)
system pressure at 15" HG standard, or 13" HG for high altitude conditions, with a
tolerance of +/- 1" HG.