Question 186Refrigeration & AC - Assistant Engineer

The correct answer is B) chill box thermostatic expansion valve. The valve labeled "29" in the illustration is a thermostatic expansion valve, which is responsible for regulating the flow of refrigerant into the chill box evaporator. This valve maintains the proper superheat at the evaporator outlet, ensuring efficient operation of the refrigeration system. The other options are incorrect because a chill box solenoid valve (A) is a different type of valve used for on/off control, a freeze box thermostatic expansion valve (C) would be used in the freezer section, and a chill box evaporator pressure regulating valve (D) is a different component that maintains a specific pressure in the chill box evaporator.