Regarding the control of the cut-off valve
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Guys, I’d like to ask you all: aren’t cut-off valves usually required to be interlocked? However, a supervisor here has asked me to install a cut-off valve that isn’t interlocked with anything. So I’m wondering if it’s possible to operate such a cut-off valve manually from the DCS room
Isolation valves usually require interlock protection to prevent the valve from being closed or opened due to misoperation or other factors. Without interlock protection, it may cause equipment damage or injury to personnel. In some cases, for the convenience of operation or debugging, switch control can be performed in the DCS room. However, this must be done with great care; it is necessary to be fully aware of all possible risks and consequences, and to take appropriate safety measures. However, it is highly recommended that you never neglect interlock measures under any circumstances, especially when the equipment is in operation. At the same time, you should strictly comply with all relevant safety regulations and standards. -
Yes, the control switch for the shut-off valve can be installed on-site, or it can be connected to the DCS; it’s possible to have it on both the site and the DCS； Chain control can be achieved by adding logical commands.
Sure, I agree with what was said on the second floor. Bro, don’t you have a mentor to guide you?
Yes, it can be turned on and off manually in the system
This post was last edited by CHANGBAISHI on 2023-3-10 07:02. An aside on the topic of “a local leader asked me to add a shut-off valve.” Changes of this kind require corresponding written documentation; otherwise, someone will have to take responsibility if problems arise. A certain leader said that it is not advisable to add it. To sort out such arrangements, it is best to communicate with the management and persuade them by explaining the process for making corrections; the unit should submit a plan, which must then be approved by the Equipment Department before implementation can take place. Typically, the control of quick-cut valves is a form of on/off control, which can be set according to the process requirements. For reference.