How to distinguish between pneumatic valve and solenoid valve in drawings?

The difference between solenoid valve and pneumatic valve in the figure lies in their control part. (The painting of the valve body is the same. )

The control symbol of the solenoid valve is a coil (there is a diagonal line in the box). The control symbol of pneumatic valve is a blank box. Pipeline with control end.

The product drawing standards of different countries or manufacturers are slightly different, but the most effective way to distinguish them is that the control symbols of pneumatic control valves have letters or numerical codes of pneumatic control pipelines or control gas inlets. Solenoid valves don't.