Managing Director of Iranian Oil Terminals Company (IOTC) Pirouz Mousavi said the previous record was six million barrels in a day.
"This was achieved despite the skepticism expressed by many countries about Iran's ability to handle major volumes of oil export," Mousavi said, according to IRNA.
He further said the increased export capability has now materialized as a result of renovating the infrastructure at Kharg terminal.
Earlier in February, Mousavi said that a one-year project to overhaul Kharg facilities had increased the terminal's export capacity. The project, he said, had cost millions of dollars.
Kharg terminal is located on the Persian Gulf island of Kharg. It is the main loading point for Iran's crude oil exports.
The terminal had an offloading capacity of 14 million barrels per day (bpd) prior to the 1980-88 Iraqi imposed war on Iran. It was the target of frequent attacks by the Iraqi forces during the war which drastically reduced its export capacity. Following a series of post-war reconstruction projects, the offloading capacity of Kharg reached around six million bpd in 2007.