The Fiorentina playmaker was handed a hefty suspension on Tuesday following his dismissal against Sampdoria
The Spaniard became involved in a scuffle with Gianni Munari as Parma prepared to take a free kick in the 94th minute, prompting referee Andrea Gervasoni to give both men their marching orders.
But while Munari has been served with just a one-game suspension, Valero's ban is longer as he put his hands on the referee in his protestations against the decision.
Lega Serie A's judgement alleged that Valero "pushed repeatedly vehemently an opposing a footballer with hands on chest" and "at the time of the consequential expulsion order, placed one hand on the referee's shoulder, pushing him."
The 29-year-old will now miss his side's forthcoming fixtures against Lazio, Juventus, Chievo and Napoli.
Coach Vincenzo Montella has also been a handed a one-match touchline ban after complaining to the officials.