Installing refractometer with tube fitting - PR53 - PR53W

PR53W Installation Guide

Document code
Document type
User guide

Plan the installation location carefully before installation. See Choosing installation location.

  • Refractometer
  • Valve-body
  • Flange bolts (according to DIN, ANSI, JIS standards)
  • 17‑mm socket wrench
  • Wrenches of different sizes
These are general instructions for the refractometer mounting. Plan the process‑specific installation according to your requirements. Contact Vaisala technical support for further assistance if needed.
  1. Familiarize yourself with the installation site safety instructions.
  2. Make sure the process line is depressurized and empty.
  3. Measure the space for the refractometer and connection.
    Table 1. Installation dimensions of the refractometer and valve-body
    Flange standard A (mm [in]) B (mm [in])
    ANSI 2" 268 [10.55] 196 [7.72]
    JIS 50A 270 [10.63] 196 [7.72]
    DIN DN50 275 [10.83] 230 [9.06]
  4. Remove the transportation covers from the valve-body. Use a 17‑mm wrench to remove the nuts. Keep the nuts and washers for later use.
  5. Install the valve-body into the process pipeline. Tighten according to the strength class of the acquired bolts.
  6. Install the refractometer. Tighten the bolts to 33 Nm using a 17‑mm wrench. Make sure the electrical connections on the refractometer are in a downward position.
  7. Make sure the refractometer is firmly in place and that there is no excessive vibration. Support the piping if needed.