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Txv
johnjohn89
Member Posts: 114
hard shutoff txv is external equalizer or not? Bleed port and non bleed port what does it look like? I try to find pics of txv with bleed port can’t find any,I never saw them in real world. Anyone can help me out for this please( also can anyone find me pics of txv with bleed port and external equalizer thanks)
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Comments
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I think you’re confusing two different things. Whether or not a TXV has an external equalizer is determined by whether there’s a distributor after it. If there’s no distributor, then the valve is internally equalized; if there’s a distributor, it causes a pressure drop through it and an external equalizer becomes necessary to supply the correct coil pressure under the diaphragm in the power head so that the valve will meter the correct amount of refrigerant and provide the proper superheat.
Whether a valve is bleed or non bleed is done internally. No refrigerant should ever bleed through the external equalizer. If it does, the valve is bad.Bob Boan
You can choose to do what you want, but you cannot choose the consequences.2 -
You will need to look at the part number to figure out if it has a bleed.
I did not know that equalizer meant it had an external pressure reference port. the terminology is confusing since the bleed equalizes the system when it is off.
You can look for pictures on supplyhouse.com0 -
mattmia2 said:You will need to look at the part number to figure out if it has a bleed. I did not know that equalizer meant it had an external pressure reference port. the terminology is confusing since the bleed equalizes the system when it is off. You can look for pictures on supplyhouse.com0
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Ironman said:I think you’re confusing two different things. Whether or not a TXV has an external equalizer is determined by whether there’s a distributor after it. If there’s no distributor, then the valve is internally equalized; if there’s a distributor, it causes a pressure drop through it and an external equalizer becomes necessary to supply the correct coil pressure under the diaphragm in the power head so that the valve will meter the correct amount of refrigerant and provide the proper superheat.
Whether a valve is bleed or non bleed is done internally. No refrigerant should ever bleed through the external equalizer. If it does, the valve is bad.
I am still in hvac school, my question is hard shutoff txv is external equalizer or not, what does txv bleed port look like thanks0 -
The bleed port is internal to the valve, you would have to find a cutaway or cut one open to see it.0
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mattmia2 said:The bleed port is internal to the valve, you would have to find a cutaway or cut one open to see it.0
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