The standard use and routine maintenance of Pneumatic Fitting Pneumatic Fitting is a new type of hydraulic and pneumatic piping accessory which is oil resistant, acid, alkali resistant, and high pressure resistant. It has the advantages of reasonable structure, good sealing, and interchangeability, easy installation, quick installation and dismantling between pipes, labor-saving and time-saving, etc., and greatly reduces the labor intensity of employees. Its existence has greatly simplified our life. Here are some answers.