Hello, I have a doubt about a symbol of a relay in a wiring diagram, it doesn't appear in any list i've searched on, and also sometimes it appears as a timer, so i'm truly confused. i'll add the symbol here. Thanks. Greetings.
(the one with the W).

 

These symbols indicate a solenoid valve symbol and is also portrayed using DIN/IEC method of circuit relay logic.
The 'W' represents a solenoid coil.

Alternatives.