Sealing form of chemical pump

Mainly including: oil seal seal, gasket seal, thread seal, labyrinth seal, packing seal and power seal, mechanical seal.
1,Oil seal
It is a self tightening lip seal with a simple structure, small size, low cost, easy maintenance, low resistance torque, which can prevent medium leakage, external dust and other harmful substances from invading, and has a certain compensation ability for wear. However, it is not resistant to high pressure, so it is generally used in low pressure chemical pumps.
2, Gasket sealing
Gaskets are the basic components of static seals in centrifugal pumps and have a wide range of applications. The selection of gaskets is mainly determined by factors such as the medium transported by the chemical pump, temperature, pressure, and corrosiveness.
3, Thread sealing
There are generally two forms of sealing on chemical pumps, one is threaded connection gasket sealing, and the other is threaded and filled sealing. Both are used in sealing situations with small diameter threaded connections. The sealing component of the threaded electric diaphragm pump connected to the gasket seal is the gasket, and the thread only serves to provide compression force.
4, Labyrinth seal
When the design is reasonable, the processing is excellent, the assembly is intact, and the speed is high, the labyrinth seal effect is very good. However, in practical applications, there are many chemical pump leaks caused by this, so it is not commonly used in chemical pump sealing.
5, Packing seal
It is to place compressible and resilient packing into the packing box, and rely on the axial compression force of the gland to convert it into radial sealing force, thereby playing a sealing role.
This sealing method is called packing sealing, and this type of packing is called sealing packing. Due to its simple structure, easy replacement, low cost, adaptability to speed, pressure, and wide range of media, packing seals are widely used in the design of chemical pumps.
6, Power seal
When the chemical pump is in operation, the pressure head generated by the auxiliary impeller balances the high-pressure liquid at the outlet of the main impeller, thereby achieving sealing. When parking, the auxiliary impeller does not work, so a parking sealing device must be equipped at the same time to solve the possible chemical pump leakage during parking.