Why a Hard Shut Off TXV Closes

[@coldfinger459sub0]

That was one of the best visual and verbal explanations of the operation of a hard shut off expansion valve I have ever seen and heard in combination good job 👍

[@leekazan556]

I love these quick tutorial videos. Keep them coming. You are helping all of us become better HVAC techs and not hacks!! Thank you!!

[@joeformisano1299]

Love it. These is one of those things the we observe in the field but don’t understand. Thanks for the insight on why this happens.

[@user-hj5le6lo9w]

Great video! Clear, concise and informative. I thought I had a copper tubing plug in my system while pressure testing. Glad I came across this video.

[@REFRITEKREFRIGERACION]

Thank you for all you do for the HVAC/R community, all your videos are super helpful. 👍👍👍

[@scottallen5182]

cool breeze great info as always from Brian Orr.

[@margieinting2423]

Nice shot

[@jimmylanders2175]

Hey Bryan - could you do an training video on HSO TXV vs regular TXV with bleed off. When do use each device, equipment type to install, HVAC or Refrigeration. Thank you.

[@mbahcarrier1629]

Thank you for the knowledge, success for "HVAC ......" ... Pekalongan, Central Java, Indonesia attended

[@frankgonz31]

And that's why a potential relay comes in handy.

[@joseriggio4366]

great tip, I was getting crazy why not able to equalize pressure afte filter change and send nitrogen by the liquid line, 👍

[@jerrylockhart3069]

Installed new evap coil and txv today. Carrier fx4dnf49 air handler with perfect air flow. Did everything by book. While charging unit up. Txv Started failing and was freezing up at the valve and Distribution Tubes. Brand new valve with equalizer braised in properly. As well as bulb mounted properly after brazing. Started failing on me and I had to heat it up with a lighter and then I had to leave it outside the cabinet where I may go back tomorrow, Saturday or Monday. To finish and install another new valve. What the heck is it in the mail in China? Or the assembled in Mexico. Which is it and it’s not just carrier. I think it was a Dan Foss

[@billyoc1960]

Good video. I wonder if the TXV will close while pulling a vacuum? If there was a way that I could force the TXV open throughout the Evacuation process, then I would have more confidence that I have pulled a complete evacuation. I always suspect that I'm not evacuating each side equally, and that my micron gauge is only measuring one side. Also, If I could force open the TXV then the pressure leak test would be easier and more reliable.

[@james6794]

kzbin.info/www/bejne/qGKbhqyYfbmprJY

[@billyoc1960]

@@james6794 Thanks. That makes sense.

[@jerrylockhart3069]

So it’s safe to say just because the pressures aren’t exactly equalizer for only off by 20 or 30 psi or it just takes a long time to get there that there’s nothing wrong with the system. That is while it’s running it has proper superheat and sub cooling the bulbs strap tight and insulated etc. as well as proper airflow

[@OcRefrig]

Good video.

[@flybyairplane3528]

BRYAN, hi good video, although a DIFFERENT senerio low temp refrigeration,,a PRESSURE LIMITING VALVE , where it will not go wide open, so as NOT to overload the compressor after defrost , basically no need for a CPR EG ;SPORLAN calls theirs a ‘ ZP .’, & there are some large AC valves with a MOP rating , cheers 🇺🇸🇺🇸🇺🇸🇺🇸

[@redphill1561]

Thank you very helpful.

[@restaurantandcommercialkit6113]

That was awesome

[@usmanshakeel1304]

Thanks Sir

[@Stuart68505]

I wonder if the hard shut off feature means that commercial refrigeration will not have to use a solenoid to pump the system down to control the temperature and to stop liquid refrigerant from flowing into the compressor during the off time.

[@ishalljr]

Thanks. Have you done anything in crankcase heaters?

[@OnePointLander]

Would a hard shut off txv be used in heat pump applications?

[@engineeringtomorrowgenerat6935]

In shutoff position liquid store in high side and txv external equalization valve hard close and if the pressure built up in highside what happens???

[@vincentpribish9276]

Trips the high pressure switch if one is used.

[@SnowCamo45]

🤔💯💯💯🤜

[@morejelloplease]

who is the plumber version of brian? i have a new house that has a screwed up water heater / recirculation install. my hvac is screwed also, undersize return, vertical mounted system, screwed up static pressure, thermostat location, zone configuration it's a $25k bryant evo. now that you mention it, my electrical is screwed also, cree led's with led lutron dimmers and they gently flicker for 10 seconds every other minute. anyone want to buy a house? lol