Of course, but most gyms I have been to do not have the pullover machine.
And if there is a machine, you should know this: These machines, at least all I have ever seen, has one little fault; They all have long straight backrest, so the machine is effecting your muscle only. When you do it with DB hanging cross the bench, it is effecting also in your posture, it stretches your ribcage and give more mobility for your thoracic spine, which could be quite stiff for most of us..