NEW YORK - Valero Energy Corp said Monday a gasoline-producing fluidic catalytic cracking unit at its 287,000 barrel-per-day Port Arthur, Texas refinery was back at planned rates following a Friday malfunction.

Port Arthur's FCC is at planned rates, Bill Day, a spokesman for the top U.S. refiner, told Reuters via email.

Valero had cut feed to the unit following a Friday morning malfunction, when a standpipe in the FCCU lost steam pressure, according to a notice filed that day with the Texas Commission on Environmental Quality.

Day said the crude unit, FCC and hydrotreater at its 87,400 bpd Ardmore, Oklahoma refinery have not returned to production following a hydrotreater fire earlier this month.

The crude distillation unit at its 185,000 bpd St. Charles, Louisiana refinery also remained down after an early June fire, he added.

There's still no updated timetable for restart of units at St. Charles or Ardmore, Day added in his email on Monday.

Valero has said previously that the St. Charles vacuum unit and coker will be restarted once the crude unit returns to operation. (Reporting by Haitham Haddadin; Editing by John Picinich)