Proportional valve

A proportional valve, comprising:

• a casing, having at least one fluid inlet, a fluid outlet, at least one first connection passageway, at least one second connection passageway and an accommodating space, wherein the at least one first connection passageway is in fluid communication with the fluid inlet, the at least one second connection passageway is in fluid communication with the fluid outlet, and the accommodating space is in fluid communication with the at least one first connection passageway and the at least one second connection passageway;
• and
• a valve trim, located in the accommodating space of the casing, comprising:
• a flow splitter, having two third connection passageways and at least one fourth connection passageway, wherein the two third connection passageways are in fluid communication with the at least one first connection passageway, and the at least one fourth connection passageway is in fluid communication with the at least one second connection passageway;
• an adjusting rotor having a channel and two blocking portions, and being configured such that, when bisected, the adjusting rotor provides two symmetrical halves, wherein the channel is in fluid communication with the two third connection passageways and the at least one fourth connection passageway, each of the two blocking portions corresponds to a respective third connection passageway, and the adjusting rotor is rotatably disposed on the flow splitter so that each of the two blocking portions blocks a part of the respective third connection passageway to adjust an overlapping area between the channel and the respective third connection passageway.