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PCT Loops / PCT Loop Functions in P&I Diagrams

PCT loops and PCT loop functions are represented using P&I symbols in the P&I diagram. These P&I symbols are located in the Special.slk symbol library.

PCT Types

There are different PCT types for PCT loops and PCT loop functions. Different P&I symbols must be used, depending on the PCT type.

The following table shows a selection of possible PCT types and the relationships between location and P&I symbol.

Activation site / Implementation

On-site

Measuring station

Control room

Measuring station (not visible)

Control room (not visible)

1

2

3

4

5

General

1

PCS

2

Process computer

3

PLC

4

See also