When the temperature is below 0 ℃, the increase in liquid water solidification volume may cause irreversible damage to the pipelines, joints, and components in the water cooling system. If the components of the water cooling system are damaged by freezing, the laser manufacturer will not provide warranty.
Here are some warm reminders for winter antifreeze protection measures. Please read them carefully to avoid unnecessary losses.
1、 No antifreeze added
If there is no power outage in the local area and the user does not consider the cost of electricity, the water cooler will not be turned off at night to ensure that the cooling water is in a circulating state and the temperature is not below freezing point.
2、 Using antifreeze as coolant
If there is a power outage in winter and the conditions for draining the coolant every day are not met, antifreeze must be used.
The basic liquid of antifreeze is generally composed of alcohols and water, requiring high boiling and flash points, high specific heat and conductivity, low low-temperature viscosity, less foaming, and no corrosion of metal parts, rubber hoses, etc. When selecting or mixing antifreeze, its freezing point should be 5 ℃ lower than the minimum temperature of the usage environment.
1. Selection of antifreeze
Add professional brand antifreeze to the chiller, such as Clariant’s AntifrogenN antifreeze, with a minimum addition ratio of 3:7 (antifreeze 3, water 7). After adding antifreeze, it can resist -15 ℃ without freezing. If the temperature is below this range, please consult the laser cutting machine manufacturer to confirm the antifreeze ratio.
2. Precautions for using antifreeze
Any antifreeze cannot completely replace deionized water and cannot be used for a long time throughout the year. After winter has passed and the temperature has risen, it is necessary to clean the pipeline with deionized or purified water, and restore the use of deionized or purified water as a coolant. Meanwhile, during holidays such as the Spring Festival or prolonged power outages, please completely drain the water from the laser, chiller, and machine tool pipelines.
3、 Special reminder
Dear users, please take it seriously and do a good job in prevention and protection to avoid unnecessary economic losses.