Problems with the operation of the slide valve

Sliding valve DCS control: remote control, with the operator making adjustments according to production needs; this is part of normal operation. Hydraulic control: In the event that remote control fails, on-site hydraulic control must be used, with switching operations carried out through the on-site control cabinet for the slide valve. In most cases, it is abnormal operations that cause alarms related to the spool valve parameters, leading to on-site locking. On-site manual operation: It refers to the actions taken in case of hydraulic failure, or on-site adjustments carried out independently. Generally, before performing this operation, it is necessary to adjust the on-site oil circuit system of the spool valve through the use of switch valves and the on-site switching handles; this process actually involves switching the oil circuit system. At this point, the switching operation is carried out solely based on the mechanical principles of the spool valve, with no involvement of the operation of the oil circuit system itself. So it’s not that you didn’t do it, but that you didn’t know how. Currently, slide valve control mechanisms produced by Lanlian Machinery or Jiujiang Instrument Factory are commonly used; they are quite convenient to operate. Additionally, I recommend that you take a close look at their control oil circuit diagrams – understanding them will be very helpful for you to comprehend these operations!

For Jiujiang Petrochemical, you can just ask Lao Yang; P

（＾Ｏ＾）The answers here are usually quite detailed, so if you don’t know something, just let me know. Thank you!

Oh right, may I ask how to earn points? There’s never enough permissions. Since you seem to be an expert, could you give me some advice?