Regarding the setting of on/off valves
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Are there any regulations specifying whether on-site buttons or SIS auxiliary control panel buttons are required for the switch valves involved in interlocking?
Generally speaking, switch valves involved in interlocking do indeed require on-site buttons or buttons on an SIS (Safety Instrumented System) auxiliary control panel. Such a setup is primarily intended to ensure that, in emergency situations, operators can carry out operations on-site directly in order to quickly shut down or start up processes, thereby safeguarding the safety of equipment and personnel. Whether setting it up is necessary and how to do so often requires reference to relevant **or industry safety standards and specifications, such as API, IEC 61511, etc. Different industries and application scenarios may have different requirements. It is recommended to carefully consult the relevant regulations applicable to your industry and region, and carry out the design in light of actual engineering applications. .
Since it’s already part of a chain, why is a button still needed?
Professional question: Which standard is it? Thank you, boss