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Emerson Flow Control (Alco) 057291 Thermal Expansion Valve 3/8" X 1/2" Sweat 5' Capillary

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Special Price $138.67 Regular Price $159.47
In stock
SKU
057291
The Emerson Flow Control (Alco) 057291 Thermal Expansion Valve is a metering component used to control the flow of liquid refrigerant into the evaporation coil in HVAC systems. It is attached by a 5' capillary tube to the evaporator outlet, measures the conditions, and opens an internal valve to regulate the flow of refrigerant. The valve has 3/8" by 1/ 2" sweat connections that connect, to the liquid line and evaporator inlet of the refrigerant circuit. It is placed in the refrigeration pathway to regulate refrigerant flow, to ensure constant superheat levels.
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Manufacturer:
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Manufacturer Name: Emerson Flow Control (Alco)
Product Number: 057291
OEM Part Number: 057291
Product Description: Hfesc 3/8X1/2Swt 5Ftcap
Weight:1.55lbs/703.07g

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Customer Questions
What maintenance is required for the Emerson Flow Control (Alco) 057291 Thermal Expansion Valve?

Regularly inspect the thermal expansion valve for refrigerant leaks, corrosion, or damage to the capillary tube. Ensure the sensing bulb is securely mounted and properly insulated. Keep the system clean and free of moisture or debris. Always disconnect power and relieve system pressure before servicing.

What are common issues with the Emerson Flow Control (Alco) 057291 Thermal Expansion Valve?

  • Valve sticking or failing to regulate refrigerant flow properly.
  • Refrigerant leaks at sweat connections.
  • Damaged or kinked capillary tube affecting pressure control.
  • Improper superheat adjustment causing cooling inefficiency.

Installation Steps

Step 1: Shut down refrigeration system, isolate power, and recover refrigerant safely using equipment with PPE.

Step 2: Remove old valve and prepare outlet tubing, ensuring clean, dry cuts.

Step 3: Install valve in correct flow direction and braze sweat connections using nitrogen purge to secure internal oxidation.

Step 4: Secure the capillary sensing bulb tightly to the suction line and insulate properly for accurate readings.

Step 5: Evacuate system to deep vacuum, recharge refrigerant, and check superheat and stable cooling operation.