How often should the vacuum oil in the HUMGINE vacuum drying box be changed? The general recommendation is to replace it once every three months. However, this can vary depending on usage frequency and the type of materials being dried.
The drying chamber is a sealed space connected to a vacuum pump and pressure sensor via a vacuum line. The vacuum pump continuously removes air from the working chamber, creating a vacuum that is lower than atmospheric pressure. To maintain the desired vacuum level, air is introduced through an intake valve to balance the pumping effect. A manual control valve is installed before the vacuum pump, allowing users to adjust the pumping speed as needed. The pump also includes a gas ballast valve, which should be opened when pumping vapors or moisture to prevent condensation inside the pump.
If a water container is placed inside the drying chamber, the vacuum pump will gradually reduce the pressure, lowering the boiling point of the water. This causes the water to start boiling and evaporating into vapor, which is then removed by the vacuum pump. To manage this process efficiently, the drying box is equipped with a condenser located before the vacuum pump. As the water vapor passes through the condenser, some of it condenses back into liquid water, while the remaining vapor is pumped out.
Over time, if excessive moisture is drawn into the system, the vacuum pump oil may become contaminated or degraded. This typically happens within about 30 days of continuous use, especially when dealing with high-moisture materials. It’s important to monitor the oil condition and replace it when necessary to ensure optimal performance and extend the life of the vacuum pump. Regular maintenance not only improves efficiency but also prevents potential damage to the equipment.
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