Power Chokes supplies chokes into a large portion of the MPD jobs to this day. With hydraulic and electric actuation option this allows precise pressure control on the well controlling to a 1psi of pressure.
A recent development was the SCB4 choke which was specifically designed for the MPD market. Having a large debris gap and extended flow capacity the same choke can be used for all MPD operations by switching choke trim between 1.5", 2", 3" or 4". This choke can flow over 1800gpm with a less than 50PSI pressure drop and also has an optimized Cv curve allowing precise control at 30gpm.