Flyers forward Sean Couturier left the game after playing 45 seconds and taking a hit from Jared McCann at 1:38 of the first period. He will have an MRI on his shoulder Saturday, coach Alain Vigneault said.
"Down to 11 forwards, there's no doubt Carter Hart is the difference," Vigneault said. "But I'm not going to apologize for good goaltending. Carter was the difference tonight. But I thought in the third period, when the game was on the line, we played our best hockey of the night. So that was, for me, a very positive sign."
The Penguins scored two goals in 32 seconds in the first period shortly after the Flyers took a 3-0 lead.
Konecny put Philadelphia ahead 1-0 with a power-play goal at 7:27. After taking a pass from Claude Giroux, Voracek moved it to Konecny in the crease for a tap-in.
"It's always nice to get the first one out of the way," Konecny said. "I was just trying to get to the right areas, and guys were making good passes. … When you have so much depth, you just have to go to the blue paint, turn around, and the puck's right there for you."