Figure 1. Type DVC Digital Valve Controller Mounted on a Sliding-Stem Valve Actuator not only itself, but also the valve and actuator to which it is mounted. Many thanks for your valuable feedback regarding this matter: There is a control valve with Actuator Fisher (power fail:Open) and a DVC Hart and an. FISHER DVC FIELDVUE Pneumatic Valve POSITIONER 30V-DC D : Industrial & Scientific.
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There is a control valve with Actuator Fisher power fail: Dfc I do not have information on the relay type of the DVC on your site, it is difficult for me to say what will happen on your end. Suggested a reverse acting relay B if the ZPC needs to be changed to close. This will give full air output to the actuator at 4mA or 0mA and zero air output at 20mA. This will give zero power failure ZPC of close and pneumatic failure of open to the current dcv assembly.
In reply to Alex Quah:. In reply to Thales:.
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My name is Thales Camargo, Many thanks for your valuable feedback regarding this matter: The actual configuration on DVC is: Could you provide me some technical feedback on this point?
Many thanks for your valuable answer, I look forward to receiving your comments on this issue.
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How can I attached 600 pictures in order to ilustrates much better my case? Hi Thales, Nice to meet you. The sequence of events will go: Zero pressure to Fisher will retract the stem upwards. This will pull the plug to an open position on a PDTC valve. You can email me at alex.
It is written on the actuator nameplate Power Fail: Mentioned that the configuration on the handheld is not an option, it is for the user to let the DVC know how the valve and actuator has been set up. In 60010 event of a loss of power to the DVC, the valve will be open and allow flow through.
Screenshots show that the users are aware of the inverted feedback.
Fisher FIELDVUE Instruments DVC6010 Valve Controller Positioner
In reply to Alex Quah: Many thanks In advance Alex for your valuable answer. The DVC has a relay type C.
I verified the configuration and it was set the Zero Power condition as Valve Close default value. However the actuator is Fisher Open. I tried to persuade the team without sucess.
They are trying to match stroke and command to the DVC But there is no positive results. I 600 sending some information to your personal mail. Again, thanks a lot for sharing vdc knowlegde and expertise. In reply to Thales: Thanks Alex for your response.