View Full Version : How to test TXVs' capacity
liujunwei
27-01-2008, 04:17 AM
see the picture,it is a test method of rating capacity for TXVs used in automobile air-conditioning system.but there is no superheat.i think there must be superheat to open a TXV,am i right?i am so confused and need your help.
could you tell me the test method of TXVs'capacity you know?Thanks!:confused:
The Viking
27-01-2008, 09:32 AM
In your picture they are testing the capacity of a TXV, they are keeping it "manually" open by immersing the temp sensing bulb in water of a fixed temperature.
I always found the easiest way to find a TXVs capacity is to take the details of it and look it up in the manufacturer's data book.
star882
28-01-2008, 06:27 AM
That would cause the TXV to go "wide open" unless it is MOP type.
That method of testing doesn't look like a very good idea as it would cause floodback.
The Viking
28-01-2008, 09:03 AM
Aha,
But if you look at the diagram, it's some sort of test rig and not a "system"...
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