The valve piece breaks in the outermost ring and there is no plastic deformation before the fracture. From the point of view of the fracture, the macro fracture is flush, the section is rough, the inner side has a step, the surface is cracked, and the crack spreads outward from the air inlet groove. The multi-source cracking is presented, the crack is expanded, and the initial section is flat and the crack tip is curved. Analysis of the Causes of Valve Fracture In order to investigate whether the material and hardness of the valve plate meet the process conditions, we commissioned the Sinopec Lanzhou Equipment Failure Analysis and Prevention Research Center to analyze and test the failed valve plate. The fracture property occurs because the fracture of the valve plate occurs at the end of the outermost groove of the outer ring. Macroscopically, some arc-shaped joints of the intake groove are not smoothly transitioned, and there are convex ribs; and the generation of fatigue crack sources is generally It occurs at surface defects such as pits and machining marks, so it can be judged that the valve piece breaks into fatigue fracture. The factors affecting the fracture and the solution measures: the influence of the cylinder volume liquid in the operation of the equipment. The fresh hydrogen component is tracked and analyzed. According to the calibration data, the content of heavy components such as C in the new hydrogen is significantly higher, exceeding 8. It has also been found that the oil quantity of the cylinder block lubricating oil is too large, and there is a serious liquid carrying problem in the compressor process medium. When the cylinder is filled with liquid, the valve plate and the valve seat must simultaneously overcome the spring force, the static pressure of the medium and the adsorption force of the liquid film on the sealing surface. At the moment of jacking, the impact load on the valve plate is increased, and during the repeated opening and closing process, the valve piece is easily damaged by the alternating load. Therefore, it can be determined that the cylinder volume liquid is the main cause of the above-mentioned valve sheet fracture. The main reason for the above-mentioned valve sheet fracture. Cause analysis of cylinder volume liquid: The ammonia cooling system of the continuous reforming unit is not used. When the hydrogen gas passes through the contact system, the temperature does not fall, and the heavy components in the hydrogen cannot be precipitated and condense into a liquid. The hydrogen is transported from continuous reforming to diesel hydrogenation for a long distance, and the pipeline has no heat preservation, which is equivalent to an equal pressure cooling process, and heavy components such as C in the medium condense into a liquid. The new hydrogen of the compressor has a low outlet temperature, and the medium condenses into a liquid after being compressed due to the low temperature. The oil volume of the cylinder block lubricating oil is too large, causing the lubricating oil to accumulate.