Vacuum pump is the core supporting component of every vacuum freeze dryer, whether small bench-top freeze dryer for food R&D or large industrial lyophilizer for mass food production; stable vacuum pressure decides uniform sublimation of all food raw materials.
Daily maintenance rule for freeze drying machine vacuum pump: check vacuum pump oil level before every food freeze-drying shift, add special vacuum pump oil timely once liquid level is lower than standard marking line.
The vacuum pump oil of industrial freeze dryer used for continuous food production must be replaced every 300–500 hours of lyophilization operation; expired oil leads to slow pumping speed and fluctuating vacuum inside drying chamber.
Users need to clean vacuum pump inlet filter screen regularly to block food powder, fruit vapor and tiny meat residues from entering pump interior, extending the whole service life of freeze dryer vacuum system.
If the lyophilizer stops food processing for more than one month, drain all vacuum pump oil completely and seal air inlet tightly, preventing internal pump rust caused by humid air and food residual moisture erosion.
Regular standardized vacuum pump maintenance can lower freeze dryer failure rate by over 70%, stably maintain long-term uniform freeze-drying quality for fruit, meat, seafood and herbal food production lines.
