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  1. wdd0422

    Carry over liquid in vacuum pump

    Gentlemen....We have a process which strips methanol from a reactor. During the reaction the system vacuum is brought down to about 4 torr and pulled through 3 condenser stages. The first condenser is cooled with regular city water, the second condenser is cooled with 40 degree f chiller water...
  2. wdd0422

    KEB Combivert Drive

    Thanks Bill, Checking the parameter setting for constant current setting it states " if this value is exceeded it will reduce the output hertz till it is in range again" (paraphrasing). I believe the issue is mechanical and this is what is happening. When I get it back I will install the drive...
  3. wdd0422

    KEB Combivert Drive

    We have a KEB Combivert Drive, F5 series Ruvatronic RT5/1001 driving a Leybold Roots vacuum pump. The X2a control card is wired to run the drive at a fixed speed of 50 hertz but for some reason the drive would not go above 10 hertz. I am told they had this problem before and swapped out the...
  4. wdd0422

    Butt splices in explosion proof disconnect

    No, I'm not trying to "dis" anyone. As I mentioned in the original post, the problem was in the stop circuit, so it was the control wiring (#12). There was water in the disconnect, this caused the wires to short at the splice and burn completely through causing the circuit to be open. This was...
  5. wdd0422

    Butt splices in explosion proof disconnect

    Are butt splices allowed in explosion proof motor disconnects? If anyone knows and can direct me to the applicable NEC code I would very much appreciate it. This is what I found while troubleshooting a motor stop circuit in a new installation in two of the disconnects.
  6. wdd0422

    Level measurement

    I am new to instrumentation and looking for advice and recommendations. We have Magnatrol pulse burst radar level transmitters on a reactor vessel containing soybean oil. Neither I or their field tech can get them to work consistently. Are these a good fit for this application? Would a guided...

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