Motor protection If the air filter unit or duct is blocked, the safety valve opens in time to allow air to flow in, cooling the motor and preventing overheating or burnout. Dust alarm activation The safety valve acts as the trigger for the pressure switch. When it opens, the dust alarm is activated, reminding the user to remove accumulated dust promptly. Prevents abnormal airflow Through proper design, such as the use of a throttling ring, abnormal conditions like too small a valve opening and fluttering of the valve core are avoided, ensuring normal air supply. Noise reduction Reasonable operation of the safety valve helps stabilize the internal airflow of the vacuum cleaner, which can reduce operating noise to a certain extent. Applications - Domestic vacuum cleaning: protects the motor and provides timely dust alerts during routine home cleaning. - Workshop or garage cleanup: maintains stable airflow and reduces noise in dusty environments. - Commercial or industrial vacuums: supports reliable airflow and maintenance alerts in higher-demand settings.