What’s the difference between a “Dual Port”, a “Supersonic”, and a “Plumb Back” valve?

What’s the difference between a “Dual Port”, a “Supersonic”, and a “Plumb Back” valve?

Our “Dual Port” valves split the released compressed air, recirculating a portion of the air into the intake tract and removing the remaining air into the atmosphere. A “Supersonic” valve vents 100% of the compressed air charge into the atmosphere. A “Plumb Back” valve recirculates 100% of the close air charge into the intake tract.