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Auto Air Conditioning Expansion Valve

As one of the most important and crucial parts in an air conditioner expansion valves are devices used to control the refrigerant flow in a refrigeration system. The remote sensing bulb is connected to the expansion valve by copper tubing filled.


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In this article we will discuss in detail the functions of an expansion valve its different types and how they all function to make the AC unit work.

Auto air conditioning expansion valve. How to replace an expansion valve in your car DIY with Scotty Kilmer. An expansion valve is simply a refrigerant metering device to control the rate of flow of refrigerant into the evaporator located in your dash. This is accomplished by the thermal expansion valve TXV.

When the evaporator heats the valve the. Unit 4C Business Centre Dunshaughlin Co. EXPANSION VALVE DIAGNOSIS When carrying out pressure gauge diagnosis it is found the TX valve is at fault ie.

Live any component inside an air conditioning system the expansion valve can malfunction leading to an AC that wont provide any cooling. Whenever there is an abundance of refrigerant the core of the evaporator will get too cold and eventually freeze. As you may know refrigerant liquid circulates within the system and flows to the evaporator where it transforms into cool vapor.

An expansion valve meters the flow of liquid refrigerant into the evaporator where it changes from a liquid to a gas by absorbing heat from the cabin air. An expansion valve is an AC component that is commonly found on many road going vehicles. Many car makers now use automotive AC expansion valve in their AC systems.

While ensuring that complete evaporation of the liquid refrigerant takes place. This type of metering device can work well when the load fluctuates and therefore is suitable for use in the air conditioning system. Diagnosing your cars air conditioning system may reveal that your expansion valve or the orifice tube needs to be replaced.

The flow is controlled by pressure in the evaporator. This diagram shows a remote sensing bulb. We offer a wide range of automotive parts and more.

The AC expansion valve is found within the air conditioning system of a vehicle. Thermal Expansion Valves Refrigerant flow to the evaporator must becontrolled to obtain maximum cooling while ensuring that complete evaporationof the liquid refrigerant takes place. Thermostatic expansion valve uses the valve system to control the flow of liquid condensation in evaporative coils.

AC expansion valves regulate the flow of refrigerant through the AC system and if the valves fails they can cause problems with the whole system. This allows for expansion and then converts the refrigerant from liquid to vapor inside the evaporator. Always call on professionals to look your air conditioner when it encounters trouble.

The air conditioning expansion valve which is better known as the Car AC expansion valve is a component of the car air conditioning system that is found inside virtually every automobile. Start the engine and set the AC controls to max AC medium blower speed and recirculating air. The purpose of the valve is to manage how much refrigerant liquid can flow throughout this system.

In the following text we will explain Thermal Expansion Valves and their function. Jammed fully open highlow pressure to high or jammed fully closed low pressure zero to a vacuum then follow the resting procedure below. Refrigerant flow to the Classic Auto Air evaporator must be controlled to obtain maximum cooling.

The expansion valve can have a remote sensing bulb or an integral sensing device called an H block. Normal gauge readings will be between 30 and 45 psi on the low side and 200 to 350 psi on the high side. The main function of an air conditioner expansion valve is to remove pressure from the liquid refrigerant in the system.

In the illustration below youll see that low pressure gas flows out of the evaporator coil and through the expansion valve. A number of different malfunctions might lurk behind the problem and it takes training to locate the actual cause. It is usually installed at the evaporator inlet and works together with the orifice tube to regulate the flow of refrigerant through the vehicles AC system.

Skip to content 353 1 825 0543. Order automotive Expansion Valves parts Online at unbeatable prices on Auto air. In addition the valve controls the refrigerant flow called metering.

Massive range of brand new car air conditioning expansion valves auto air con valves and other aircon parts with 2 year valve warranty and free next day delivery. How to replace a bad expansion valve in car air conditioni. Allow the system to run for five minutes for pressures to stabilize.


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