Articles Tagged with ''TXV (thermostatic expansion valve)''

Thermostatic Expansion Valve - TXV

How To Stop The TXV From Hunting

Excessive hunting can reduce the capacity and efficiency of the refrigeration system
Joe Marchese
February 29, 2024
If TXV hunting is observed when troubleshooting a refrigeration system, its cause should be identified and repaired to allow for better system performance.
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Don Fort and intelliGen Refrigeration Controller

Basic Refrigeration: Thermodynamics of Heat Transfer

First in series describes how temperature and pressure changes affect refrigerant
Don Fort
Don Fort
February 1, 2023
Technicians should understand how heat transfer works in a refrigeration system, as well as the four laws that describe how temperature and pressure changes affect the state of refrigerant in a sealed piping system.
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Heatcraft-3.jpg

The Trouble with TXVs: Diagnosing the Problem

Technicians need to be patient when adjusting TXVs in refrigeration systems
Heatcraft-JustinBailey.jpg
Justin Bailey
December 8, 2022

At one time or another, every technician has run into a refrigeration system that is not functioning properly. The question then becomes how to diagnose and determine if the problem is the TXV.


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Refrigeration Evaporator.

Proper Superheat Can Protect Compressor From Damage

Technicians should make sure that liquid refrigerant is not entering the compressor
John Tomczyk
September 28, 2022
One of the worst enemies of a compressor is liquid refrigerant, so technicians should make sure the refrigeration system has proper superheat in order to protect the compressor from damage that can occur from flooding or slugging.
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Gas Ballast.

Gas Ballast in Vacuum Pump Aids Evacuation

Proper evacuation ensures no atmospheric air remains in a refrigeration system
Joe Marchese
September 3, 2022
Proper evacuation of a refrigeration system is an important part of repairing or installing a unit, and the gas ballast in the vacuum pump helps improve the process.
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Reasons Why TXVs Underfeed Refrigerant

A refrigerant undercharge may be due to TXV restriction
John Tomczyk
August 30, 2022
Technicians need to make sure that the TXV is not underfeeding refrigerant to the refrigeration or air conditioning system due to a restriction, which can be caused by a number of factors.
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TXV.

Reasons Why TXVs Overfeed Refrigerant

Proper TXV settings will keep refrigeration and air conditioning systems operating efficiently
John Tomczyk
July 27, 2022
Making sure the TXV is metering the right amount of refrigerant into the evaporator and is not overfeeding the coil is one way technicians can help their customers’ refrigeration and air conditioning systems operate safely and more efficiently.
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