Few buyers use an N/C normal close solenoid valve to pay attention to use; Very high temperature due to the high coils inside This is a normal and safe phenomenon. Continuously testing and tracking the working condition of the product, the products highest operating temperature reaches 60 degrees Celsius and the plastic parts can withstand extremely high temperatures up to 150 degrees Celsius. But this operation is not allowed. In product reviews, some buyers said that if the solenoid valve needs to work for a long time, they should purchase an N/O normal open solenoid valve to always open and not get hot, even without a power supply.