Rosemount Model 1195/ProPlate/Mass ProPlate
8-2
ORIFICE PLATE
INSPECTION
Carefully inspect the orifice plate for signs of wear, paying close
attention to the inlet edge of the plate. There should be no nicks,
scratches, or other signs of abrasion on the edge, and the sharp-edged
corners should not reflect light. Replace the plate if these signs are
present. Carefully remove any accumulated process material on the
upstream side of the plate.
Inspect the process piping and remove any process buildup while the
orifice plate is out of the assembly. Remove the transmitter or remote
connectors and clean any process deposits from the pressure tap holes.
ORIFICE PLATE
REINSTALLATION
Before reinstalling the plate, replace the old gaskets with new ones.
Reinsert the plate, ensuring that the side labeled “INLET” faces
upstream, and replace all corroded or damaged bolts. Refer to the
Installation section of this manual for comments on seal liquid and
transmitter orientation.
Gradually and uniformly retighten the two assembly and four
transmitter (or connection adaptor) bolts to the torque specified. Refer
to the installation instructions in Section 2: Hardware Installation.
Figure 8-1.
Orifice Plate Removal.
Using faulty bolts can cause process leaks. Replace bolts if they show any sign of
corrosion or thread damage.
Orifice
Plate
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