Characteristics of the check valve is to prevent backflow cause secondary pollution and bacteria, in some special occasions, such as high environment requirements can not have odor environment, usually use swing stop valve can largely stop the odor in the sewer floating into the room and sewage return, to a certain extent to protect our living environment, and the swing check valve installation with convenient, simple processing, is called a kind of practical valve.The height of the existing check valve inlet, valve body and inlet is usually consistent, and the valve body connecting spring or torsion spring, the disadvantage of the structure is: the inlet, valve body and outlet are highly consistent, the flow is not easy to flush the baffle, and the baffle needs spring or torsion spring to reset, complex structure, spring and torsion spring are easy to damage for a long term, and short service life.
Petroleum exploration and development equipment refers to comprehensive equipment for oil and natural gas exploration, drilling, development, storage and transportation, including various types of geophysical prospecting and logging equipment, drilling equipment, oil and gas production equipment, downhole operation equipment, oil and gas gathering and transportation Equipment, offshore drilling platform equipment, etc. and related accessories and tools; oil refining and petrochemical equipment refers to the complete set of equipment required in the whole process of oil and natural gas processing and conversion, including general equipment (such as various process compressors, expanders, etc.) , pumps and valves, etc.) and medical equipment (such as reactors, towers, heat exchange equipment, industrial furnaces, storage and transportation equipment, medical machinery, etc.). The equipment specifications and parameters of the oil refining and petrochemical industry are determined by the process of the oil refining and petrochemical industry. The oil refining and petrochemical industry is a process industry. The requirements for automation are high, and it is required to be able to run continuously and stably for a long period of time, so there are high requirements for the reliability of the equipment. The oil and gas exploration, development and production process is characterized by multiple links, complex technologies, and high individual requirements.
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