The high temperature water pump and the normal temperature water pump are relatively common in the application in recent years. What is the difference between the two? Next, I will briefly introduce to you.

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High-temperature water pumps refer to those pumps that can deliver temperatures between 80°C and 120°C or even higher, also known as hot water pumps, while normal temperature pumps are those pumps that can deliver liquids with temperatures below 80°C, also known as cold water pump.

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1. High temperature water pump: The high temperature water pump is optimized on the basis of the centrifugal pump, because the pump adopts the vertical installation of the motor on the upper part, and there is a short bracket between the pump and the motor, which will not leak water due to the mechanical seal. As a result, the water in the motor burns the motor, and it can also be designed as a mechanical seal on the basis of the traditional hot water pump.

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2. Normal temperature water pump: The commonly used seal of normal temperature water pump is packing seal or mechanical seal made of nitrile rubber. Since the packing itself needs liquid cooling and lubrication, the temperature resistance of the pump is only about 80 degrees, and the cold water pump with packing seal also has The phenomenon of dripping water has certain pollution to the pump body base and the surrounding environment of the pump. Such products have been gradually replaced by isg and isw centrifugal pump series products.

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So how to choose a high temperature water pump, generally speaking:

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1. We generally choose a hot water circulating pump at around 100 °C. Its representative model is IRG single-stage centrifugal pump. This type of hot water pump is generally used as a pipeline circulating pump or an air-conditioning circulating pump. The structure of the pump is divided into vertical and Horizontal, can only transport media similar to clean water.

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2. About 180°C, if we encounter this temperature, we can really become a high-temperature pump, then we generally choose CQB-G type magnetic pump for such a pump. This type of pump is divided into two types, one is resistant to 180 degrees Celsius, one can withstand temperature of 250 degrees Celsius, which can be selected according to the actual working conditions. The material of this pump is generally stainless steel.

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3. 250℃ high temperature pump, we can choose IR series heat preservation pump for this kind of water pump. This kind of water pump is a chemical pump, that is, a chemical pump, because there is a cooling device outside the pump body, which relies on water to cool the unit, so its durability. The high temperature effect is very good. The double-end mechanical seal used for the mechanical seal is to be cooled, and the material is cast iron or stainless steel. If the impeller is changed to an open type, it can also convey liquid with particles, so this chemical pump is very good in conveying high-temperature chemical liquids. Good results.

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In order to effectively ensure the working efficiency of the high-temperature water pump and improve the service life of the equipment, we need to pay attention to the following methods in use:

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1. If it is not used for a long time, the high temperature water pump should be placed in a dry, clean and no corrosive gas environment.

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2. Regularly grease the equipment. The high-temperature water pump is running at a high speed, and the grease is easy to volatilize. Therefore, the lubrication at the bearing must be kept clean, and attention should be paid to adding it.

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3. Regularly inspect the high-temperature water pump. The inspection contents include: whether the internal wiring, plug and switch are in good condition, whether the insulation resistance is normal, whether the brush tail seat is loose, whether the commutator and the brush are in good contact, whether the armature winding stage expansion stator winding is not Is there a suitable circuit phenomenon, whether the bearing and rotating parts are damaged, etc.

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4. Pay attention to the insulation resistance of high-temperature water pumps. For electric pumps that are not used for a long time or used in humid environments, the insulation resistance of the windings must be measured with a 500-volt megohmmeter before use. If the insulation resistance between the winding and the motor casing is less than 7 megohms, the winding must be dried.

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5. Save each part and replace the same parts. When disassembling and inspecting the gear oil pump, each part should be preserved. Special attention should be paid to the explosion-proof surface of the explosion-proof parts, and the brushing including the insulating gasket and the bushing can not damage them, such as If it is damaged, it must be replaced with new and identical parts. Substitute materials that are lower than the performance of the raw materials or parts that do not conform to the original specifications must not be used. All parts should be installed in their original positions during assembly, and cannot be omitted.

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Cavitation, abrasion and combined damage of high-temperature water pumps have always been an important issue in the operation, maintenance and management of water pumps. Traditional surface protection materials and processes are far from meeting the requirements of water pumps against cavitation and abrasion. In order to enhance the anti-cavitation and abrasion resistance of the surface of the water pump flow parts, in addition to using stainless steel or other hard alloys to manufacture blades and impeller chambers, continuous experimental research on surface protection technology is also carried out.

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In general, the technical requirements of surface protection materials, anti-abrasion coatings must have:

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1. High strength and hardness to resist cavitation and abrasion damage;

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2. It has the toughness of a family to absorb impact energy;

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3. With high bonding strength, the coating will not peel off under the impact of high-speed water flow of 30-35 meters per second in the pump;

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4. Coating materials must be moderately priced in order to be popularized and used in large and medium-sized pumping stations and rural small and medium-sized pumping stations with a large quantity and a wide range;

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5. The coating material should be non-toxic, non-flammable and explosive, easy to store and transport, and not pollute the surrounding environment.

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Processing technology requirements In order to promote and apply surface protection technology, the processing technology must do:

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1. The process is simple and can be mastered by operators of different levels;

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2. The tools (appliances) used in processing should be easily available in the market or used in general pump station maintenance work, and the price should be moderate without special and expensive equipment;

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3. The process should not be affected by the season and the surrounding environment, and the pump station can be carried out during the maintenance period in winter and spring;