How to replace the cable of a pneumatic control valve
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Dear friends, please explain in detail the procedure: install the clamp and set the opening degree……
Is there a problem with the cable? If a replacement is needed, first pull the cable into place, strip the wires completely, and consult with the technical team to determine what valve position can be maintained at normal operation and what limit is appropriate; the limits should then be set based on this valve position. Replace the cable after setting the limit
I’m a complete beginner; I seek guidance. What is the normal opening degree? What does this phrase mean? Isn’t the valve position always between 0 and 100? What does \"limited opening\" mean? ? ?
Most pneumatic valves have mechanical stops; by turning the handwheel to the appropriate position for air-opening or air-shutting, and then shutting off the air supply, the valve’s opening degree can be fixed
Most pneumatic valves have mechanical stops; by turning the handwheel to the appropriate position for air-opening or air-shutting, and then shutting off the air supply, the valve’s opening degree can be fixed
Most pneumatic valves have mechanical stops; by turning the handwheel to the appropriate position for air-opening or air-shutting, and then shutting off the air supply, the valve’s opening degree can be fixed
When replacing the wiring of a valve, you must not disrupt the normal operation of production. If the process requirements for the valve in question do not allow it to be in a fault position (fully open or fully closed), then you need to determine the appropriate opening degree of the valve during the wiring replacement process. For example, if the desired pressure control level is 35%, then set the valve manually to that 35% position, and then use a clamp at the valve stem connection point to hold it in that position. If there is a handwheel, there’s no need to do anything else – just use the handwheel for positioning. This way, you can switch with confidence
Does this not have a side story? It has to be changed online
First, pull the wires in place; once everything is ready, switch to bypass mode, replace it, and put it into use after verification that it works properly.