Vehicle Expansion & Orifice Valves
Expansion & Orifice Valves; An Integral Component of the Air-Conditioning System
Automotive expansion valves are integral components of the air-conditioning system, responsible for controlling and regulating its performance. Their role within the car’s air-conditioning loop encompasses several crucial functions.

How Expansion Valves Work
Expansion valves are key components in regulating pressure changes within the air-conditioning system. They control the flow and evaporation of refrigerant, directly impacting the cooling performance of the evaporator and, ultimately, the cabin temperature. Additionally, they ensure that only refrigerant vapor, and not the liquid, reaches the compressor, protecting it from damage and maintaining system efficiency.
Understanding Orifice Tubes
Similarly, an orifice tube, akin to an expansion valve, fulfils a significant function in the vehicle’s air-conditioning system. It assists in controlling the flow of refrigerant through the evaporator, the primary cooling component of the system. The orifice tube ensures a higher flow of refrigerant during periods when increased cooling is required, and a smaller flow when less cooling is needed.
Efficiency and Control in Cooling
This precise balancing of the cooling flow is fundamental for the air-conditioning system to function optimally and provide effective cooling throughout the vehicle’s cabin.
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From driers and accumulators through to expansion valves and orifice valves for passenger, commercial, and heavy-duty vehicles, we’ve got them all in stock! Shop quality, vehicle-specific air-conditioning components online or visit any of our branches nationwide.