KAIRAK Expansion Valve – 1/2 Ton, Internal Equalized, R404A Refrigerant (OEM Replacement Part)

OEM Part Details

• OEM Number: PD-120-943
• OEM Status: VERIFIED
• MPN: PD-120-943
• SKU: PD-120-943
• Part Type: Expansion valve

Product Overview

The PD-120-943 expansion valve is a refrigeration metering component for commercial refrigeration equipment. Its job is to regulate refrigerant flow into the evaporator side of the refrigeration circuit, helping the system receive the controlled refrigerant feed needed for normal cooling operation. Because refrigerant flow affects evaporator performance, an incorrect, damaged, or restricted valve can contribute to cooling concerns that require qualified diagnosis. This part is identified by verified OEM number PD-120-943, which should be used as the primary ordering reference when replacing the original component. For technicians and foodservice maintenance teams, careful part identification matters because expansion valves must be compared by more than their general appearance. The original component, connection arrangement, equipment identification details, and refrigeration circuit requirements should all be reviewed before purchase. Selecting the correct valve supports accurate service work and helps avoid delays caused by ordering a component that does not match the equipment. The valve is one part of a connected refrigeration circuit, so a cooling concern should not be attributed to this component without evaluating related refrigerant-flow and evaporator-side conditions. Confirming the OEM number and comparing the removed valve helps keep the replacement decision focused on the correct component.

Product Function

An expansion valve meters refrigerant as it moves from the high-pressure side of a refrigeration circuit toward the evaporator feed. By restricting and regulating that flow, the valve helps establish the conditions needed for refrigerant to absorb heat in the evaporator section. The PD-120-943 is used as a commercial refrigeration flow-control component and should be selected only after the original part and equipment requirements have been compared. A refrigeration concern can involve several connected components, so the valve should be considered as one part of a complete system diagnosis rather than the assumed cause of every cooling issue.

Why Choose a Genuine OEM Replacement?

The verified OEM number PD-120-943 provides a dependable reference for identifying this expansion valve. Matching that number to the removed component and applicable equipment information helps reduce wrong-part orders. An OEM-numbered replacement is especially useful when several valves have a similar appearance but differ in connection arrangement or refrigeration circuit application.

How This Part Works

During normal refrigeration operation, refrigerant reaches the expansion valve before entering the evaporator feed path. The valve creates a controlled restriction that meters refrigerant into the lower-pressure side of the circuit. That metering action is important because the evaporator requires an appropriate refrigerant feed to perform its heat-absorption role. If flow is restricted, inconsistent, or affected by another circuit issue, cooling performance and frost patterns may warrant inspection by a qualified refrigeration technician. The valve should not be evaluated by appearance alone. Refrigeration circuit condition, connected tubing, related controls, and filtration components can all influence how the system performs. Replacing the correct part begins with confirming PD-120-943 and comparing the original component’s connection arrangement and installation orientation.

Technician Service Tip

Before replacing an expansion valve, compare the removed component with PD-120-943 and inspect the connected tubing and filter-drier for signs of damage, contamination, or restriction concerns. Refrigeration circuit service should be performed by qualified personnel.

Common Failure Symptoms

• Reduced cooling performance may indicate that the refrigeration circuit requires inspection.
• An unusual frost pattern near the evaporator section can indicate a refrigerant feed concern.
• A cabinet that does not maintain its expected temperature may warrant evaluation of the complete refrigeration circuit.
• Intermittent cooling results can indicate a control, restriction, or refrigerant-flow concern.
• Signs of restricted refrigerant movement should be evaluated by a qualified refrigeration technician.
• Evaporator feed concerns may indicate that the valve and related circuit components should be inspected.
• A suspected flooding or starved evaporator condition requires professional system diagnosis.
• Damage, corrosion, or disturbed connections around the valve may indicate that the component and connected tubing need inspection.

Commercial Applications

This expansion valve is intended for commercial refrigeration equipment service where a verified PD-120-943 replacement is required. Typical commercial settings can include restaurant kitchens, foodservice facilities, refrigeration service operations, and maintenance departments responsible for temperature-controlled equipment. Application should not be assumed from the valve alone. Equipment identification details, the removed component, refrigeration circuit arrangement, and connection configuration should be reviewed before ordering. A qualified refrigeration technician can determine whether the valve is appropriate for the equipment and whether another condition in the refrigeration circuit should be addressed at the same time.

Before You Order

• Match verified OEM number PD-120-943 to the original component and applicable equipment documentation.
• Compare the original valve’s overall configuration with the product image.
• Review the connection arrangement before purchase.
• Confirm the equipment identification details from the data plate.
• Verify that the part is being ordered for commercial refrigeration equipment.
• Compare the original component’s installation orientation and connected tubing layout.
• Review refrigeration circuit requirements with a qualified refrigeration technician.
• Inspect the filter-drier and connected refrigerant tubing when diagnosing a possible flow concern.

Related Components

• Filter-drier: Inspect for restriction or contamination concerns that can affect refrigerant flow through the circuit.
• Connected refrigerant tubing: Review tubing condition and connection areas for damage or disturbance near the valve.
• Evaporator components: Inspect the evaporator section when evaluating refrigerant feed and cooling-performance concerns.
• Refrigeration controls: Evaluate related control components when system operation appears inconsistent or does not respond as expected.

Frequently Asked Questions

What does the PD-120-943 expansion valve do?

The PD-120-943 expansion valve meters refrigerant flow into the evaporator feed path of a commercial refrigeration circuit.

What is the main ordering reference for this expansion valve?

Use verified OEM number PD-120-943 as the primary reference, then compare the original component and equipment information before ordering.

Should I compare the original valve before ordering?

Yes. Compare the original component’s configuration, connection arrangement, orientation, and equipment identification details before purchase.

Can an expansion valve be the only cause of a cooling concern?

No. Cooling concerns can involve refrigerant flow, connected tubing, filtration components, controls, or other refrigeration circuit conditions. Qualified diagnosis is recommended.

Why should the filter-drier be inspected with an expansion valve concern?

A filter-drier can affect refrigerant flow if restriction or contamination is present, so it is a relevant component to inspect during refrigeration circuit diagnosis.

Who should service an expansion valve in commercial refrigeration equipment?

Refrigeration circuit service should be performed by qualified refrigeration personnel who can evaluate the complete system and confirm the correct replacement part.