Citroën Relay III A/C Conditioner Expansion Valve 2.2 Diesel 52413490

Citroën Relay III A/C Conditioner Expansion Valve 2.2 Diesel is an air conditioning system component responsible for the precise expansion of refrigerant within the installation. Thanks to a properly selected expansion valve, the air conditioning system in a vehicle equipped with a 2.2 Diesel engine maintains stable operating parameters, ensuring predictable cabin cooling and correct interaction with other components. This solution is intended for users looking for a technically matched, used component for a specific version of the Citroën Relay III.

Specifications and technical data

• SKU: 52413490
• Mark: Citroën
• Condition: Used
• OEM Part Number: 52413490
• Substitutable numbers: A.311.025.00
• Fuel type: Diesel
• Part type: A/C Expansion Valve
• Category: A/C Expansion Valves

Function and role of the expansion valve in the Citroën Relay III

The expansion valve in an air conditioning system plays a key role in the process of reducing refrigerant pressure before the evaporator. In the Citroën Relay III model with a 2.2 Diesel unit, it is responsible for:

• controlled expansion of the refrigerant depending on the system's operating conditions,
• stabilization of the evaporator temperature and reduction of the risk of icing,
• maintaining the balance between the high and low-pressure sides of the air conditioning system,
• proper interaction with the compressor, condenser, and receiver-drier.

A well-selected expansion valve allows for maintaining cooling efficiency while reducing the load on the system driven by the diesel engine, which is important for both driving comfort and the durability of other air conditioning components.

Intended for the 2.2 Diesel unit

The presented component is intended for the air conditioning system in the Citroën Relay III with a 2.2 Diesel engine. In this configuration, the expansion valve is adapted to the operating characteristics of the diesel unit, including:

• the RPM range typical for diesel engines,
• thermal conditions in the engine compartment,
• loads generated by the A/C compressor while driving with a load.

Such matching is particularly important in commercial vehicles, where the air conditioning is used frequently and under variable loads, and the system must maintain stability during long-term operation.

Characteristics of the used component

The offered expansion valve comes from the group of used Citroën parts, which allows for economical repair of the air conditioning system while maintaining the original design and refrigerant flow geometry. A used component of this type is particularly attractive in the case of:

• repairing fleet vehicles, where reasonable service costs are a priority,
• restoring air conditioning efficiency after a compressor failure or system seizure,
• gradual rebuilding of the air conditioning installation using original components.

Using an original expansion valve from the same model family reduces the risk of connection mismatch issues and system operating parameter problems.

Benefits of using the correct expansion valve

Selecting the appropriate expansion valve for the Citroën Relay III 2.2 Diesel translates into specific operational benefits:

• stable cooling performance across a wide range of external temperatures,
• more even load on the A/C compressor,
• reduction of phenomena such as excessively low evaporator temperature or unstable system pressures,
• better interaction with the air conditioning control system in a commercial vehicle.

For workshops and fleet users, this means fewer return visits for service and predictable system behavior after replacing the component.

Product group and additional information

The presented component belongs to the Expansion valves category, i.e., components responsible for regulating refrigerant flow in automotive air conditioning systems. This group includes various design solutions, which is why when selecting parts for the Citroën Relay III, it is worth following compatibility with the specific engine version and air conditioning system.

If you are planning a comprehensive repair or modernization of the air conditioning area in your Citroën and need other elements from the same group, such as control valves, additional expansion valves, or compatible adjustment elements, check the available parts in the Citroën expansion valves category.

For users interested in a broader approach to repairs and modernization using used components, including solutions used in other brands, an article describing the practical aspects of tuning and service using second-hand parts may be helpful – you can find it here: Audi on second-hand parts – tuning and repairs without losing quality.