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Recent content by joji90

  1. joji90

    Exothermic welds VS Clamps Connections

    Hello Everyone, Site: Netherlands, Facility: Pharmaceutical We have a grounding ring grid underground a building and the connections from this to the Earthing bars inside the building are supposed to be exothermic welds (According to a drawing which was produced earlier). the client is now...
  2. joji90

    Reading the Circuit diagram of a Safety switch( RCU)

    Dear Che12345, thanks for your time, the old Motor loop drawings from the plant I'm working on has RCU represented differently, I'm trying to figure out that how it works, any help is appreciated. please see below: Please excuse me for being a noob in electrical engineering! Regards, Joji
  3. joji90

    Cable Size reduction near the consumer.

    Dear Che12345, due to the reasons stated above , i connected the power cable directly to the JB( got rid of the Switch after client said that can be done) Thanks for the response. Regards, Joji
  4. joji90

    Cable Size reduction near the consumer.

    @Rraghunath, thanks for your reply. my question was not whether it would cause a trip rather will the existing breakers inside MDB-I-01(designed for the 10mm2 cable) provide enough protection incase of any short-circuit in the 2.5mm2 section of cable ? @che12345, thankyou, we have breakers...
  5. joji90

    Cable Size reduction near the consumer.

    I have a power cable running from the MCC room to an analyzer cabinet, we calculated the required size and pulled 10mm2 cable(10-P-1142/1143). however after the switch , its reduced to 2.5mm2 since this portion of the cable was existing. this section of the cable ( 10-P-2101/2017) is only 5...
  6. joji90

    API plan 54 instrumentation

    Thanks @jjpellin. Finally the client decided to go with trip only for high temperature of the seal and high pressure of the seal fluid.
  7. joji90

    API plan 54 instrumentation

    Johnny, the question is not really regarding the process safety . the consequences of tripping the agitator on the reactor can be assessed by the client process department, however what instrumentation on the seal oil unit ensures continuous sealing fluid to the agitator? lets say all those...
  8. joji90

    API plan 54 instrumentation

    Guys, I have a glycol sealing unit( plan 54) for agitator of a vessel, below is the seal PID and arrangement proposed by the vendor however in the old system ( which is being replaced now) had PSLL tripping the agitator at 2 barg which is not included in the new system by the vendor...
  9. joji90

    On-off valve Hookup

    @fmjalink,@compositepro,@little inch- thankyou all for your inputs. we decided to change the valve to a single acting as per the PID( dont know why it was double acting in the past) , and decided to hook it up as shown below. strangely, the client doesn't know why there was a accumulator...
  10. joji90

    Reading the Circuit diagram of a Safety switch( RCU)

    Dear Che12345, Perfect, thank you so much. One last question, I have another RCU where contacts are marked Z1/Z2 instead of 1 and 2. what does Z prefix mean? Thanks and regards, joji
  11. joji90

    Reading the Circuit diagram of a Safety switch( RCU)

    Hi Che12345 thanks a lot for your response, this info I couldn't find anywhere online . I removed the first picture because the vendor confirmed that the development drawing was wrong, hence I replaced with this one. So in fig(2) ,just to clarify more, 1.)what is the significance of I ,0 and...
  12. joji90

    Reading the Circuit diagram of a Safety switch( RCU)

    Hi All, can anyone help me read this circuit diagram for a remote control unit of a motor . excuse me for being a noob! I'm from instrumentation background. thanks in advance, joji
  13. joji90

    On-off valve Hookup

    thanks everyone for the replies.. I'm not going to dig in much as we don't have the valve (??) anymore which is needed to get the actual picture. So I'm going to ask the vendor to make it FO with slow opening, will not use the accumulators anymore. In the new situation., The flow reducer valve...
  14. joji90

    On-off valve Hookup

    @TiCl4,Little inch-Thanks for the reply, I'm just wondering how the old valve functioned. That's why I'm trying to find out what that thing in question was actually. @ composite pro, Thanks for the reply,, the solenoid valve is indeed a 3/2 valve that controls the main air downstream as you see...
  15. joji90

    On-off valve Hookup

    the problem is the valve overhaul company delivered new assembly with new actuator( double acting) thinking the old one was double acting seeing the two air connections. I asked him about the component in clouds, but it doesn't have anything written on it. physically the old valve assembly are...
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