Autocad Plant 3d Iso Symbol Skey -

For existing models without changing the spec:

The ISO engine will ignore the spec’s original SKEY and use your custom GAG block.

<SymbolDef>
  <Name>My Custom Diaphragm Valve</Name>
  <Skey>DIA_CUST</Skey>
  <BlockName>Diaphragm_Custom_Top</BlockName>
  <Annotation>SPECIALTY</Annotation>
  <Overrides>
    <Scale>1.5</Scale>  <!-- Scale symbol by 150% -->
  </Overrides>
</SymbolDef>

Pro Rule: Never edit the original IsoConfig.xml in the installation folder. Always place a modified copy in your Project Isometric folder. Plant 3D uses a cascading override logic: Project > System. autocad plant 3d iso symbol skey

Many owners (refineries, chemical plants) have their own isometric symbol standards (e.g., a specific way to draw a rupture disc or a steam trap). By modifying the SKEY mapping, you can make Plant 3D follow client rules without changing the 3D model.

Not all symbols connect the same way. Plant 3D treats two categories of SKEYs differently: For existing models without changing the spec:

Modern versions of Plant 3D support Long SKEYs (more than 3 characters). This allows for intelligent matching.

For example, instead of one GAV symbol for all gate valves, you can have: The ISO engine will ignore the spec’s original

To do this, you do not change the SKEY property in the spec. Instead, use the SkeyMap XML to map the FullDescription or LongSkey:

<SkeyMap skey="GATE-150LB-FLANGE" acadBlock="G15" />
<SkeyMap skey="GATE-300LB-FLANGE" acadBlock="G30" />

Then, in your IsoSymbols.dwg, create blocks named G15 and G30 with different sizes (thicker flanges, different bolt patterns).

Plant 3D’s isometric engine does not “see” shapes. It reads data. If the SKEY is wrong, the automation fails. Correct SKEYs mean you click “Create Isometric” and walk away—no manual cleanup required.

Go back to your Spec Editor or Project Setup. Find your Magnetic Flow Meter part. Change its SKEY property to MAG. Regenerate the ISO.