1-24 of 693 results for Automotive: 'air conditioning orifice tube' Filter results by your vehicle: Enter a new vehicle to add it to Your Garage and filter the results below. Enter a new vehicle Amazon's Choice for air conditioning orifice tube. ACDelco 15-5378 GM Original Equipment Air Conditioning Orifice Tube. This is because the orifice tube acts as a restriction in the system, and anytime there is a restriction in an air conditioning system, the temperature will drop. For instance, if there is a crease in a condenser, ice or frost will form at that location. ACDelco GM Original Equipment A/C Orifice Tubes, which separate the high and low pressure sides of the air conditioning system, control the flow of low pressure liquid refrigerant into the evaporator. The orifice tube is essentially a calibrated restriction located at the inlet to the evaporator.
Expansion Valves: The expansion valve is a complex valve which regulates refrigerant flow at the evaporator inlet with an internal moving rod mechanism. This rod opens and closes to differing heights based upon the cooling burden put upon the system. This process of metering modulates the flow according to the temperature of the refrigerant in the evaporator coil. Too much refrigerant could cause the evaporator to get too cold and even freeze up the coils. Too little refrigerant would result in inadequate cooling.
The refrigerant which enters the expansion valve is high-pressure liquid, and is warm. The liquid which flows through the valve and enters the evaporator is low-pressure and cold. This is the exact point where the refrigerant has passed from what is known as the “high side” to the “low side” of the system.
Orifice Tubes:
Unlike the expansion valve, the orifice tube is a simple fixed device with no moving parts. It therefore cannot vary the flow of refrigerant into the evaporator, but rather causes a permanent restriction in the system. However, like the expansion valve the orifice tube regulates refrigerant flow through the system and filters debris which may come through in its screen.
Ac Orifice Tube Direction Diagram
Ac Orifice Tube Size Chart
Auto Ac Orifice Tube Location
It becomes necessary to replace the orifice tube if the fine mesh screen or the internal components of the orifice tube become plugged, restricting refrigerant and lubricant flow. Orifice tubes also designate the dividing point between the “high” and “low” sides of the system.
LMK 2019
Auto Ac Orifice Tube Location