Determining whether an explosion-proof pressure cooker needs replacement depends on its service life, the condition of its core components, and its performance. If it is found to be past its expiration date, deformed, leaking, or its safety devices are malfunctioning, it should be immediately discontinued and replaced.
Based on national standards and practical experience, the following five aspects can be considered:
Is the Service Life Exceeded?
Electric pressure cookers are recommended to be used for no more than 5 years, while traditional gas pressure cookers are generally recommended for 8 years.
Even if the exterior appears intact, the internal metal structure may experience fatigue and decreased strength due to long-term exposure to high temperature and pressure, increasing the risk of explosion.
Is the Pot Body and Lid Deformed?
Check if the bottom of the pot is concave or convex, and whether the edge of the pot rim is smooth.
If the lid wobbles significantly or cannot be locked after being closed, it indicates structural damage and a potential risk of pressure leakage or even explosion.
Is the Sealing System Aging?
Yellowing, hardening, cracking, or loss of elasticity in the sealing ring are typical signs of aging.
If steam continuously escapes from the edge of the pot lid or oil seeps out during cooking, it indicates a seal failure; the sealing ring or the entire pot should be replaced immediately.
Is the safety device functioning properly?
The float valve should automatically rise and stably release air after pressurization, and naturally fall after cooling. If it is stuck or does not move, it indicates a blockage or spring failure.
Intermittent venting, abnormal noises, or insufficient pressure from the pressure relief valve may indicate internal blockage or material aging, affecting pressure control safety.
Abnormal behavior during use:
A significantly longer cooking time and food that is difficult to soften may indicate insufficient pressure.
Difficulty opening the lid or the float not falling after forced cooling indicates a blocked venting passage and a risk of residual pressure.