Testing TXV's

Information on some common auto air conditioning topics.
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Dougflas
Posts: 189
Joined: Mon Apr 18, 2016 6:10 pm

Testing TXV's

Postby Dougflas » Sat Jul 16, 2016 6:06 pm

greenquark
Posts: 14
Joined: Mon Jul 11, 2016 6:26 pm

Re: Testing TXV's

Postby greenquark » Sun Jul 17, 2016 1:45 pm

Question: Must the test be with compressed aire only? Or it must have the same output with any source of air? Let say : With a small pump, or even bow it with the mouth?
Dougflas
Posts: 189
Joined: Mon Apr 18, 2016 6:10 pm

Re: Testing TXV's

Postby Dougflas » Mon Jul 18, 2016 6:02 am

this test is with the system being under a condition of charged. Make sure vehicle has run for 10 minutes or so the stabilize the refrigerant syatem.
greenquark
Posts: 14
Joined: Mon Jul 11, 2016 6:26 pm

Re: Testing TXV's

Postby greenquark » Mon Jul 18, 2016 11:33 am

Dougflas wrote:this test is with the system being under a condition of charged. Make sure vehicle has run for 10 minutes or so the stabilize the refrigerant syatem.



Huh? The pdf does not describe that. I am referring to the right angle Tvx. It says remove the Tvx.
Dougflas
Posts: 189
Joined: Mon Apr 18, 2016 6:10 pm

Re: Testing TXV's

Postby Dougflas » Mon Jul 18, 2016 12:18 pm

And I was referring to the on vehicle test. Yes, you can use dry shop air.
AdmissionPro456
Posts: 2
Joined: Fri Oct 27, 2017 3:30 am

Re: Testing TXV's

Postby AdmissionPro456 » Fri Oct 27, 2017 3:48 am

A thermostatic expansion valve (TXV) is built up around a thermostatic element separated from the valve body by a diaphragm. Its purpose is to regulate the rate at which refrigerant flows into the evaporator.

TXVs can contain one of three different types of charge:

universal charge
Maximum operating pressure (MOP) charge.
MOP charge with ballast (standard for Danfoss expansion valves with MOP).











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