First, the chemical pump seal Sealing chemical pump seal is a self-tight lip seal, its simple structure, small size, low cost, easy maintenance, smaller torque resistance, both to prevent media leakage, but also to prevent external dust and Other harmful substances invade, but also a certain degree of wear and tear compensation, but impatience high pressure, it is generally used in low-pressure chemical pumps. Second, the chemical pump gasket seal Chemical pump commonly used sealing method, a gasket seal method. Gaskets are the basic components of centrifugal seals, the use of a very wide range. Gasket selection mainly based on chemical pump delivery media, temperature, pressure and corrosion and other factors. Third, the chemical pump thread seal thread seal Chemical pump generally has two forms, one is threaded connection gasket seal, one is filled with thread filling economy seal, both for small diameter threaded connections sealed occasions. Threaded electric diaphragm pump gasket sealing seal gasket, while the thread only to provide the role of compression. Fourth, the chemical pump labyrinth seal in a well-designed, well-processed, well-assembled, high speed, the labyrinth seal works well. However, in practical applications, resulting chemical pump leaks are many, so not commonly used in the chemical pump seal. Fifth, the chemical pump packing seal Chemical pump packing seal is full of compressibility and resilience of the filler into the stuffing box, rely on the gland axial compression into radial sealing force, which play a sealing effect. This method of sealing is called packing sealing, which is called packing. Due to the simple structure of the packing seal, easy replacement, low price, to adapt to speed, pressure, medium wide and chemical pump design is widely used. Six, chemical pump power seal chemical pump In operation, the impeller generated by the pressure balance of the main impeller exit high pressure liquid, in order to achieve sealing. When parking, the impeller does not work, so it must be equipped with a parking seal at the same time to stop the chemical pump leakage may occur. Vice impeller sealing structure is simple, reliable sealing, long service life, chemical pump operation can achieve drip leakage, so the chemical pump delivery of impurities containing medium pump often used.
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