Maintenance is an important issue for dependability : to achieve a high degree of assurance, the number and frequency of people in the sterile area should be limited.On SERAIL freeze-dryers, most maintenance operations can be performed from the non-sterile side. UNIFLUID TM system with cascade refrigeration requires much less maintenance than direct expansion type freeze-dryers or system using two-stage compressors. For system reliability, computer-controlled systems are pre-programmed to monitor the performance of all major components. When parameters deviate from acceptable levels, the control system notifies the user of the need for maintenance. Our engineers are ready to assist you and check the process when problems occur. Our software delivers immediate on-line, step-by-step troubleshooting and documentation for repair of manufacturing equipment and process.