Working Principle of Vertical Steam Sterilizer
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Summary: Vertical steam sterilizers are high-pressure steam sterilization devices and represent the ideal choice for sterilizing and disinfecting instruments and dressings in healthcare and research settings.
Vertical steam sterilizers are high-pressure steam sterilization devices and represent the ideal choice for sterilizing and disinfecting instruments and dressings in medical, health-care, and research settings. The following outlines the complete sterilization process for this equipment:
Before starting the equipment, add an appropriate amount of distilled water, close and lock the sealing door; the self-pressurizing design ensures that the chamber is sealed as a sterilization chamber. Heating generates steam to displace residual air, preventing trapped cold air from lowering the actual temperature and compromising sterilization efficacy.
Subsequently, the system enters the heating-and-pressure-raising phase, during which the built-in heating element boils the water, generating high-temperature saturated steam that is continuously injected into the chamber. As the steam accumulates, both the pressure and temperature inside the chamber gradually increase.
Once the system enters the constant-temperature, constant-pressure sterilization phase, it automatically maintains the set temperature and pressure. During this phase, saturated steam exhibits exceptionally strong penetrative power, enabling it to penetrate packaging materials, instrument crevices, and even the interior of liquids. The sterilization time must be appropriately adjusted based on the type of load: at 121°C, the cycle should be maintained for 20–30 minutes; at 134°C, it should be maintained for 4 minutes.
After sterilization is complete, the system enters the venting and pressure-reduction phase, during which steam is slowly vented from the chamber through the exhaust valve to prevent a sudden pressure drop that could cause liquid boiling over and package rupture.
The entire process is coordinated by a microcomputer control system that continuously monitors and adjusts pressure sensors and temperature probes in real time, ensuring precise matching of temperature, pressure, and time to guarantee sterilization efficacy that meets medical and laboratory standards.
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