In the excavator brake air circuit system, a gas control valve is installed between the air pump and the air reservoir. Its main function is to separate oil and water from compressed air. Filter the dust and impurities in the compressed air. Prevent the compressed air in the air reservoir from flowing back to the air pump. During the use of the excavator, abnormal adjustment pressure and other faults may occur, which will eventually lead to the failure of the gas control valve. This article will explain the causes of abnormal adjustment pressure. Due to different models of excavators, the air pressure in the air reservoir of excavators may be different. Therefore, the data mentioned in the article are for reference only. Please refer to the specific value provided by the manufacturer.
The function of the safety valve is to ensure that the air pressure in the air reservoir does not exceed 0.78MPa. If the safety valve still does not relieve pressure when the pressure exceeds 0.78MPa, the air pressure in the air reservoir will continue to rise. This may be due to the leakage of the relief valve diaphragm and the rigidity of the relief valve spring. If the valve and valve seat are not sealed due to poor spring weakness, the pressure will be relieved if the air pressure does not meet the requirements. At this time, the damaged parts shall be adjusted or replaced respectively.
