[Asia Pump Network News] Different chemical pumps have different forms of sealing. Xiaobian now to inventory the chemical pump sealing form what? What are their characteristics? Chemical pump mechanical seal Chemical pump seal forms are: oil seal, gasket seal, thread seal, labyrinth seal, packing seal, power seal, mechanical seal. First, the oil 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 the intrusion of external dust and other harmful substances, And wear a certain degree of compensation, but impatience high pressure, it is generally used in low-pressure chemical pumps. Second, gaskets Seals is 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 thread seal on the chemical pump in general there are 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 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 packing seal is the compressive and resilient packing into the stuffing box, relying 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. Sixth, sealed with chemical pump In operation, the impeller generated by the pressure balance of the main impeller outlet 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. Seventh, mechanical seals Chemical pump industry is now the most widely used form of seal, the mechanical seal with less leakage and long life and other advantages, so today the world's mechanical seal is the most important shaft seal in these devices. Mechanical seal, also known as end seal, is defined in the relevant national standards: "by at least a pair of perpendicular to the axis of rotation of the end face in the fluid pressure and the compensation mechanism elastic (or magnetic) and the role of auxiliary seal to maintain fit relative sliding of the device to prevent fluid leakage "Further reading: pump valve pipe fittings exhibition 2016 exhibition of information industry, Internet (Xiamen) Technology Co., Ltd. author: Asian pumps network editor: Yao Xiaoxia (QQ / micro-channel :) (service Hotline: 400-6030-811)