Hot water pump and cold water pump as the name suggests, in the name we can see, is for hot water transport and cold water transport pump, these two pumps because of the difference in medium temperature, resulting in a number of significant differences between hot water pump and cold water pump, the following pump manufacturer Changsha Zoomlian pump industry on the difference between the two in detail:
1. Temperature range
Hot water pump: can transport the temperature between 80℃ and 120℃ liquid. Some hot water pump products, such as IRG hot water circulation pump, can even reach higher temperatures through optimal design, such as up to 240 ° C.
Cold water pump: usually used to transport the temperature of 80℃ below the liquid. It is mainly used in occasions that require low-temperature coolant, such as air conditioning water circulation, etc., so it is also known as low-temperature coolant circulation pump.
2.characteristics and uses
2.1Hot water pump:
Sealing method: Due to the high water temperature of the hot water pump, the general packing sealing method cannot be used for the hot water pump, and mechanical sealing is generally used.
Material: Due to the high water temperature, generally can not use cast iron material, according to the specific temperature, you can choose ductile iron, cast steel, stainless steel and alloy material.
Good stability: smooth operation, no vibration, low noise, to ensure the overall stable operation.
Easy maintenance: the replacement of seals and bearings during maintenance is simple and convenient, the outlet design is reasonable, convenient pipeline layout and installation, and space saving.
2.2Cold water pump:
Sealing method: The water temperature of the cold pump does not exceed 80 degrees Celsius, so most of the time the cold pump will choose the economical packing seal, that is, the disc to seal, but like the pipeline pump, even the conveying of cold water is also a mechanical seal, and the multistage centrifugal pump can choose the packing seal.
Material: Because the water temperature is high, not more than 80 degrees Celsius, most of the time the cold water pump will choose economic cast iron material, of course, if the water contains some fine particles can choose wear-resistant materials, such as ductile iron, and some special use scenarios, such as conveying drinking water, you should choose stainless steel material.
Widely used: not only for air conditioning water circulation (therefore also known as air conditioning cold water pump), but also widely used in the industrial field of cooling water and coolant transport, as well as the construction field of pumping.
3.sealing method
Hot water pump: mechanical seal is usually used, which performs well under high pressure and high temperature conditions, and is not easy to leak, ensuring the long-term stable operation of the pump body.
Cold water pump: the early use of packing seals, has been gradually replaced by mechanical seals. The mechanical seal not only solves the problem of water leakage, but also improves the overall performance and reliability of the pump.
4.structure and installation
Hot water pump: such as IRG type hot water circulation pump, vertical installation, motor is located in the upper part, between the pump and the motor is provided with a short bracket, both to ensure stability and easy maintenance.
Cold water pump: the structure is diverse, including centrifugal pump, plunger pump, screw pump, etc., and the installation method varies according to the specific model and application scenario.
In summary, there are significant differences between hot water pumps and cold water pumps in terms of temperature range, characteristics and uses, sealing methods, and structure and installation. The selection should be considered according to the specific application scenarios and requirements.