Regulating valve with multi-step plug of series GC400 and AC400 of SCORE is specially designed for liquid with high pressure drop. This kind of valve adopts the same multi-stage pressure reducing principles with the labyrinth cage valve. Yet the flow channel is the adjustable large flow channel which ensures smooth flow through the bending channel if particles and impurities contained in the fluid.

The flow channel is not of right angle turning, thus the velocity control is not as good as labyrinth cage valve. Therefore this valve is recommended when only particles contained in the flow.