What are the common faults of the solenoid valve of the laboratory ultrapure water machine during use? The solenoid valve is one of the important electrical components of the laboratory ultrapure water machine. The failure of the solenoid valve to work normally will affect the normal use and maintenance of the laboratory ultrapure water machine. Today, I will talk to you about the common fault solutions of the laboratory ultrapure water machine solenoid valve.
In the laboratory ultrapure water machine, there are two types of solenoid valves, namely the water inlet solenoid valve and the waste water solenoid valve. Different types of products have similar principles but different effects.
(1) Water inlet solenoid valve : The main function is to control the water inlet. The water inlet solenoid valve is opened during work to allow tap water to pass through; when the equipment is shut down, the solenoid valve is closed to cut off the tap water to avoid the constant flow of waste water.
(2) Waste water solenoid valve : the main function is to adjust the water inlet pressure of the reverse osmosis membrane of the equipment to achieve the purpose of water production.
Under normal circumstances, the common faults of the solenoid valve of the laboratory ultrapure water machine mainly include:
1. Cannot start after power on
1. Check whether the power cord is connected normally and whether the voltage is within the working range. You can try to reconnect the power cord to adjust the voltage to the normal range.
2. Check whether the coil has desoldering, short circuit, etc., and weld or replace it with a new product according to the problem.
3. If there are impurities in the water, the main valve core and moving iron core of the equipment solenoid valve will be stuck, resulting in lax closure, the water intake of the ultrapure water machine will be reduced, and the pure water and waste water will also be reduced. At this time, we need to clean the equipment and install a filter before the solenoid valve.
4. The working pressure difference is unstable, and the frequency of equipment use is too high to reach the life limit of the solenoid valve. The pressure difference should be adjusted in time or a multimeter should be used to test its quality (the ohm value of the water inlet solenoid valve is about 90) and the corresponding solenoid valve should be replaced in time. valve.
Second, the solenoid valve can not be closed
1. Check whether the main valve core and moving iron core have impurities or the seals are damaged. Clean and replace the seals.
2. Check whether the temperature and viscosity of the water are too high, and replace the corresponding solenoid valve in time.
3. The spring of the solenoid valve of the ultrapure water machine is deformed or its life has expired, so replace it with a new one in time.
4. If the equipment runs for a long time, you can remove the solenoid valve and blow hard along the direction of the water flow. If it is ventilated, it means that the life of the solenoid valve has expired and needs to be replaced.
5. Check whether the throttling hole, balance hole, etc. are blocked, and clean them in time.
6. There is also an illusion that the solenoid valve is broken, but in fact it is not broken, but it is thought to be installed upside down, causing waste water to flow continuously when there is no power. At this time, we only need to change the direction of the solenoid valve. OK.
3. Other faults
1. There is noise when the device is powered on
Check the fasteners or other small parts on the valve body for looseness, and tighten them in time; if there are impurities or unevenness on the suction surface of the iron core, please clean or replace them in time.
2. Internal leakage
Check whether the seal is damaged, whether the spring is not assembled properly, and adjust it in time according to the actual situation.
3. External leakage
If the connection is loose or the seal is damaged, reconnect or replace the seal.
The above is a summary of the solution to the common faults of the solenoid valve of the ultrapure water machine in the laboratory. You can check one by one according to different situations. If you don’t know about maintenance, you need professionals to operate and maintain it to avoid damage to the original parts. The editor recommends that you purchase products and spare parts from regular manufacturers of laboratory ultrapure water machines to ensure product quality and service life.
