Detailed explanation of application industry
1. HVAC and refrigeration industry
This is the largest and most classic application market for shielded pumps, almost becoming an industry standard configuration.

Chiller/heat pump unit: used to transport refrigerants (such as R134a, R1234ze), refrigerants (ethylene glycol solution/brine), and cooling water. Its zero leakage characteristic completely prevents refrigerant leakage and refrigerant loss, ensuring long-term efficient operation of the system.

Absorption chiller: the core power equipment for transporting lithium bromide solution, requiring high vacuum sealing, and shielded pump is the only choice.

Regional cooling/heating stations: widely used in the primary and secondary circulation of large energy stations, suitable for installation inside buildings due to their quiet and maintenance free characteristics.

2. Chemical and process industries
Mainly used for circulating relatively clean, valuable or dangerous process media.

Fine Chemicals and Pharmaceuticals: Transport high-purity solvents, monomers, intermediates, etc. to prevent pollution and leakage losses. Especially suitable for enclosed reactor jacket heat medium circulation (thermal oil).

Low temperature liquid transportation: transporting easily vaporized media such as liquefied petroleum gas, liquid ammonia, and liquid carbon dioxide. A reverse circulation shielded pump should be selected to prevent cavitation.

High temperature heat medium system: Transport high-temperature heat transfer oil such as diphenyl ether, used for heating reaction vessels, molds, etc. A high-temperature shielded pump with an external cooling jacket is required.

Light oil transportation: Transport light, volatile, and flammable materials such as benzene, toluene, and gasoline within the device.

3. New energy and power industry
Nuclear power plant: Nuclear grade shielded pumps are key equipment used to transport cooling water, boric acid solution, etc. for the primary and secondary circuits. Require absolute reliability, zero leakage, and the ability to withstand extreme conditions such as earthquakes. Usually equipped with multiple monitoring and protection systems.

Polycrystalline silicon/photovoltaic industry: used in the reduction and hydrogenation sections of silicon material production for the circulation and transportation of chlorosilanes such as trichlorosilane and tetrachlorosilane. The medium is flammable and explosive, with high value, and requires strict sealing requirements.

Ground source/water source heat pump system: used for water circulation on the underground heat exchange side, with quiet and maintenance free environmental requirements.

4. National Defense and Aerospace
Ship nuclear power plant: Similar to civilian nuclear power plants, it is used for the main coolant circulation pump and requires extremely high reliability and compactness.

Aerospace: Used for environmental control systems in aircraft or spacecraft (such as fuel hydraulic oil heat exchange cycles) and critical fluid transport in ground support equipment.

5. Other special fields
Ultra pure water system: used in the final polishing cycle of semiconductor or pharmaceutical ultra pure water systems, requiring no pollution or detachment.

Experimental and testing equipment: requires a small fluid circulation device that is quiet, vibration free, and leak free.

Food and Beverage Industry: Used for transporting clean fluids such as edible oil, syrup, alcohol, etc. on sanitary production lines, but it should be noted that they are not suitable for media containing particles.

Taboos and limitations of selecting shielded pumps
Understanding the "not applicable" scenarios of shielded pumps is equally important as understanding their application areas:

It is strictly prohibited to transport media containing solid particles: particles will quickly wear down graphite/silicon carbide bearings, causing pump failure. This is the most important limitation.

Strictly prohibit dry running and interruption: bearings rely on medium lubrication and cooling, and short-term dry running can cause catastrophic damage.

Be cautious when using high viscosity media: High viscosity media can affect the self circulating cooling effect and may cause the motor to overheat.

Not suitable for media with strong corrosiveness but poor lubricity: Even if the material is corrosion-resistant, poor lubrication can lead to rapid bearing wear.

Relatively limited power: Traditional structures are not as flexible as magnetic pumps in high-power applications (except for special cases such as nuclear main pumps).