Does turning the expansion valve clockwise increase or decrease the flow?

[DiLuna]

Turning the expansion valve clockwise decreases the flow. Rotating the adjustment screw of the expansion valve clockwise increases the spring force, reduces the opening of the thermal expansion valve, and thereby decreases the flow. Conversely, turning the adjustment screw counterclockwise increases the flow of the expansion valve. When the valve stem is rotated clockwise, the needle hole opening of the valve body is reduced, decreasing the liquid supply flow. Rotating the valve stem counterclockwise enlarges the needle hole opening, increasing the liquid supply flow. The adjustment method for the expansion valve is as follows: 1. If the superheat is too small, turn the adjustment screw clockwise (i.e., increase the spring force and reduce the opening of the thermal expansion valve) to decrease the flow. 2. Conversely, if the superheat is too large, indicating insufficient liquid supply, turn the adjustment screw in the opposite direction (counterclockwise) to increase the flow. Due to the thermal inertia of the thermal expansion valve's sensing system in actual operation, the signal transmission is delayed. Adjustments should be made after the operation has stabilized.