Pump anti-freezing
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What should be considered to prevent pump freezing in winter?
They are mainly divided into hot oil pumps and normal-temperature pumps. Hot oil pumps focus on insulating the volute as well as the cooling water, while normal-temperature pumps allow the related components to be removed when not in use, or the outlet can be operated at a reduced capacity when they are in use
Pumps that are not in use for long periods during winter should have the water inside them drained to prevent freezing damage. It is advisable to rotate the pump shaft before starting it, to avoid jamming and damaging the motor.
Make every effort to ensure the fluidity of the medium, while also providing proper protection for the water system.
First: If the pump is operated in winter, it is necessary to ensure that the medium keeps flowing. Many substances tend to crystallize in winter, so care must be taken to prevent crystallization during transportation; it is advisable to use insulation measures on the pipelines, such as electric heating or insulating materials. Second: If the pump is not used in winter, the medium inside the pump must be completely drained to prevent crystallization. When starting the pump, it is essential to turn the shaft manually while the pump is running. If it is a high-temperature medium, steam preheating must be used to prevent damage to the pump caused by the difference in expansion coefficients between the rotor inside the pump and the components surrounding it
In winter, make sure to drain the water from the external water supply before starting up; install it at that time to prevent the water pipes from cracking due to freezing, which could affect startup
To understand this, freezing means that water turns into ice and expands, thereby damaging equipment; therefore, it’s necessary to prevent freezing from occurring. So what can be done? One solution is to remove the water, and the other is to ensure circulation
Running the pump usually isn’t a problem; the main issue is shutting it down. If it isn’t used in winter, be sure to drain the medium from the pump and pipelines. It’s generally fine to check this before starting the pump, right?
Before winter arrives, it is necessary to systematically clean the cooling water filters of pumps that use cooling water. In winter, pay close attention to whether the cooling water is flowing smoothly. The decommissioned pump is used to drain the water, and nitrogen is introduced to dry it out. . .
This post on http://bbs.hcbbs.com/thread-438469-1-1.html also explains it~ You can take a look~
You can refer to the method of using a hot standby pump: 1. Insulation with a steam or hot water jacket. 2. Run the pump from its outlet to the inlet of another pump, ensuring that a small amount of liquid flows back into the standby pump to prevent it from freezing.