Valero and Parma counterpart Gianni Munari were both dismissed in the fourth minute of stoppage time in the 2-2 draw following an incident involving the two players.
Serie A's disciplinary committee confirmed Valero would be banned for four games as a result, while Munari will only serve a one-game suspension.
The judgement ruled Valero "placed one hand on the referee's shoulder, pushing him", but the Spaniard denied Gervasoni's recollection of events and insisted he had shown a "lack of respect" by questioning his integrity.
"I want to say that everything that happened in Parma saddened me. I am disappointed with the system," Valero said on Wednesday.
"What the referee wrote after the match shows a lack of respect to my integrity as a person and a player.
"I did nothing to deserve getting sent off, all I was doing was separating two players who were quarrelling and it was me who got sent off.
"Never in my life have I done anything against the referee. Everything that Gervasoni said was lies."
Manchester United eyeing surprise move for AC Milan star for whom tension in Italy is growing: report
‘Even though Kevin Keegan was my boyhood hero, we never really saw eye-to-eye. That was an underwhelming time for me – I felt on the outside’: Newcastle cult hero reveals disappointment over how things went under King Kev
