The clear answer is: No.
During the sterilization cycle, the chamber of a pulsating vacuum moist heat sterilizer is maintained at high temperature (typically ≥121 °C) and positive pressure, with saturated steam ensuring a moist heat environment. Even if an operator mistakenly believes that "the water has been turned off," the chamber still contains a large amount of high‑temperature steam and residual pressure until the program is completely finished and both pressure and temperature have dropped to safe thresholds. Forcibly opening the door at this moment would cause an instantaneous burst of hot steam, leading to severe scalding injuries. Moreover, the sudden pressure release could damage the door gasket and hinge mechanism, compromising future chamber integrity.
From a control logic perspective, modern pulsating vacuum sterilizers are equipped with door interlock systems-as long as the chamber pressure remains above atmospheric pressure or the temperature exceeds a safe setpoint (typically >80 °C), the electromagnetic or pneumatic lock stays engaged, preventing normal door opening. This is a fundamental safety design in accordance with ISO 14121 risk control principles.
To ensure operator safety and maintain sterilization efficacy, the correct procedure is: wait for the sterilization program to complete automatically, and allow the necessary cooling or depressurization phase to finish, until the control panel displays "Door Release Allowed" or the pressure gauge reads zero and the temperature falls within the safe range-only then open the door following standard operating procedures.
In daily use, the door lock mechanism, sealing gaskets, and pressure sensors are critical components that safeguard this interlock function. If the lock becomes stuck, the seal ages, or sensor signals drift, interlock failure or false alarms may occur. Hansheng Automation can custom‑machine latch bolts, shift forks, door seals, and sensor mounting brackets based on original drawings or on‑site measurements, using heat‑resistant stainless steel or medical‑grade silicone rubber, to ensure reliable interlock performance and reinforce the safety of every door‑opening operation from a hardware standpoint.
Additionally, operators are advised to undergo regular safety training and strictly adhere to the equipment operating manual-any attempt to open the door before the program concludes is a prohibited violation and must never be attempted.
