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。
2
For deficiencies of its structure, the previous breather valve with fire protection is not suitable for installing on light oil storage tank at cold area.