Replacing non-return valve for PR53GP - PR53 - PR53AC - PR53AP - PR53GC - PR53GP - PR53M - PR53SD - PR53W

PR53 Series User Guide

Document code
M212898EN
Revision
E
Language
English
Product
PR53
PR53AC
PR53AP
PR53GC
PR53GP
PR53M
PR53SD
PR53W
Document type
User guide

Follow these instructions to replace the non-return valve in PR53GP refractometer.

  • Non-return valve (Vaisala item 278021SP)
  • 9/16 in wrench
  • PTFE‑tape
Figure 1. Installing non-return valve to PR53GP wash connection.
  1. Familiarize yourself with the safety instructions of the installation site.
  2. Make sure the process line is depressurized and empty.
  3. Remove the old non‑return valve.
  4. Clean the threads with a brush to remove any remaining PTFE‑tape.
  5. Add 2-3 rounds of PTFE‑tape to the threads of the new non‑return valve.
  6. Install the non‑return valve. Make sure you install it according to the flow direction. Tighten using a 9/16 in wrench.
    CAUTION Be careful not to over-tighten.
  7. Make sure there is no leaking after restarting the process. Tighten connection if needed.
  8. Keep the material certificates delivered with the spare part for later use.
  9. Recycle removed parts according to the recycling instructions in PR53 Series User Guide (M212898EN).