... bag accumulator, piston accumulator .etc Patent own CDZ-Y1 Nitrogen Charging Vehicle works as a special N2 pressurizerand charging ... :25,35,42MPa(3)Reversing type: Hydraulic PilotOperating PrincipleThe Nitrogen Charging Vehicle consists of hydraulic device, gas device and ... accumulator, aero tire, and high-pressure vessel, telecommunication cable with N2 or inert gases. 2.pipe pressure test: N2 or ...