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Trane VAL12843 Thermal Expansion Valve(TXV) Valve 3/8" ODF R410A 14" Capillary Tube

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Special Price $187.18 Regular Price $215.26
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SKU
VAL12843
The Trane VAL12843 Thermal Expansion Valve is an HVAC system using R410A refrigerant. In this system, this valve is essentialto control flow of refrigerant in the system. A smart funnel, reacting to changes in temperature in the evaporator coil. The TXV will open the valve to allow more or less refrigerant into the coil, and then close it again to prevent more from entering. The connections are 3/8" in diameter for easy installation. Typically, the valve is designed to withstand pressure levels on the high side of the refrigerant circuit of around 200 PSI and on the low side of the refrigerant circuit of 82 PSI.
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HVAC Controls & Electrical, Valves
Manufacturer:
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Specifications

  • Length: 4"
  • Weight: 0.7 lbs
  • Size: 3/8 x 3/8"
  • Pressure: 200/82 PSI
Manufacturer Name: Trane
Product Number: VAL12843
OEM Part Number: VAL12843
Product Description: Expansion Valve
Weight:0.7lbs/317.51g

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Product Questions (2)
Customer Questions
What maintenance is required for the Trane VAL12843 Thermal Expansion Valve?

Inspect refrigerant lines and valve connections regularly for leaks or blockages. Ensure the capillary tube is securely positioned and free from kinks. Maintain clean system conditions to prevent debris buildup affecting flow control and system efficiency.

What are common issues with the Trane VAL12843 Thermal Expansion Valve?

  • Refrigerant underfeeding or overfeeding causing unstable cooling performance.
  • Blocked or restricted capillary tube reducing flow accuracy.
  • Valve sticking due to contamination or debris in the system.
  • Erratic evaporator pressure leading to inconsistent temperature control.

Installation Steps

Step 1: Disconnect power and recover the refrigerant from the system.

Step 2: Access the evaporator coil and remove the existing TXV.

Step 3: Install the new valve and connect the refrigerant lines.

Step 4: Secure the sensing bulb to the suction line and route the capillary tube carefully.

Step 5: Braze the connections while protecting the valve from excessive heat.

Step 6: Evacuate the system, recharge with refrigerant, restore power, and test operation.