Sale then enjoyed their best spell of pressure until the end of the game although were unable to turn frequent entries into Bath's 22 into more than one try.
Sale sustained pressure until the end of the game but failed to convert frequent entries into Bath's 22-metre area into more than a single try.
O'Flaherty responded for Sale minutes later with a one-handed dive into the corner as the team searched for a way back into the match.
The victory moves Bath up to fourth place in the standings, while the result marks the third loss of the campaign for Sale, who drop to eighth position heading into the international break.
"Straight after half-time we came out scored our fourth try,"said Sale.
The result is the third loss of the campaign for Sale and means they go into the international break eighth, while Bath move up to fourth.
O'Flaherty replied minutes later at the other end with a superb one-handed dive into the corner as Sale looked for a way back in.