The club are set to announce that the 32-year-old has signed on at Old Trafford as understudy to David de Gea.
Valdes has been training with Louis van Gaal’s squad for the last two months as a free agent as part of his recovery from a serious knee injury.
The Spain keeper has signed an 18-month deal with United as he bids to return to action after injury
Valdes was recovering from injury and has not played since injuring his knee last March
Former Barcelona keeper Valdes' good attitude has impressed staff and players alike at United
United manager Louis van Gaal has said little about his plans for Valdes but has been impressed enough in recent weeks to offer him a deal.
Valdes’ arrival will give De Gea proper competition at Old Trafford for the first time. Current No 2 Anders Lindegaard is not considered good enough by Van Gaal.
The signing of Valdes will inevitably lead to more talk about De Gea’s future.
United have not been able to get the young Spaniard’s name on a new contract and Real Madrid are keen to take the 24-year-old back to Spain as a long-term replacement for Iker Casillas.
United are looking to let Lindegaard return to Scandinavia while they will not stand in the way of Ben Amos should a club come in for him.
United say they won't stand in the way of Ben Amos (right) should another club come knocking
United have told the former England Under 21 international that they will not stand in his way if he receives other offers. Lindegaard, meanwhile, has been linked with Molde.
The 30-year-old Dane almost left Old Trafford last summer when Van Gaal made an unsuccessful attempt to hijack Kenneth Vermeer’s move from Ajax to Feyenoord with a player-plus-cash bid.
Lindegaard has since drifted out of contention as a serious rival to De Gea and has not played at all this season. It was thought he might have been called up for Sunday’s FA Cup tie at Yeovil but Van Gaal left him on the bench again.
United have high hopes that 19-year-old Joel Perreira could provide reliable back-up as the season develops.
