Relief valve or vent valves permit a small pressure to be maintained on the vapor over the oil in the tank (except when the tank is being emptied).
卸压阀或通气阀使罐内油面上方的蒸汽保持微正压(油罐正在排空时除外)。
2
It is pointed out that the plugging and freezing of breather valve, variation in parameters and operation conditions of oiltank and human factors result in the shrink of oil tank.
指出导致油罐抽瘪的主要原因是呼吸阀堵塞和冻结、油罐参数和工艺条件发生变化以及操作失误等。
3
Open system is the pump suction from the tank, the oil through a variety of control valves, the drive hydraulic actuators, valveoil return back for another fuel tank.