pid·ANSI/ISA-5.1-2024 + ISO 10628-2:2012·water-treatment, industrial, utilities·complexity 3/3·since v0.3.0
Water-treatment pump, filter, and actuator symbols
A compact process train that demonstrates a general liquid pump, diaphragm dosing pump, media-filter service ports, and a motor-operated outlet valve.
For the process or controls engineer
What this example proves
The process meaning stays in the topology and named ports, not in coordinates or colors. The filter's main inlet/outlet, chemical injection, backwash, and drain connections remain distinct. The outlet valve uses the same valve_control body as a pneumatic loop, but composes a motor actuator and therefore expects an electric controller signal.
If an agent writes a port such as F-101.drian, SchemaTex keeps a partial preview visible but reports PID_UNKNOWN_PORT; it no longer silently routes the line through an unrelated default port.