What are the delay requirements for high/low interlocks regarding liquid level (temperature, pressure, flow rate, etc.)?

This time requirement is usually not specified explicitly in particular standards, but is determined based on the actual manufacturing process, equipment protection needs, and safety considerations. When designing specific industrial control systems, it is necessary to set appropriate delays based on the characteristics of the process control system and the requirements for safety protection, in order to ensure the safe and stable operation of the system. Therefore, the specific requirements for interlock delay must be determined based on process conditions and experience. If there are mandatory requirements, they may stem from internal company standards, industry standards, or **international standards; however, in many cases these standards merely provide a framework for design and operation, with the specific values still needing to be determined based on actual circumstances. .