txv work around experiment pics

[towpainter3]

After too many times trying to find a good txv from a chinese source, I've decided to try this.
You will see pictured the o-ring to flare adapters needed to attach the sporlan txv to the evap core without modding it at all. Just in case!!!. They are made from the ends of the old txv and the appropriate flare adapters. The old ends were drilled to accept the pipe and then brazed up. The next pic is the assembled unit less the power head.
The txv has been sized to the same 1-1/2 ton rating as the available replacement txv's. Or if your a refrig guy, its got a #4 orifice and im using a 43 power head. For 134 rated -10 to +50 degrees. The abitlity to rebuild and adjust this txv is awesome and should make for some real cold air. Will follow up with some installation pics and some fully installed pics tomorrow !!!

 

[towpainter3]

We now have cooold air!!!!
The original adapter to the low side of the txv had to be trashed due to clearance issues with the cowl panel,but with some carefully thought out and some seat of the pants guessing it worked out great.
I had to move the txv behind the blower motor to allow for clearance so some creative piping and soldering had to be done after 3 or 4 mock up tries I finally got it right.
The system has been completely rehosed and flushed out with a reman compressor and a larger dryer installed for added capacity. Also with the addition of low and high pressure switches to eliminate the temperature switch in the evap.
After charging the unit with 34 oz of r134a the guages read 30 low side and 190 high side at a ambient of 77 degrees and a run stabilizing time of about 30 mins.
I had to open the valve on the txv 1/2 turn to get a good run at 1800 rpms as the clutch was cycling in and out to quickly.
After checking everything out and test driving.I'm getting 36 to 38 degree air coming out of the middle vent on the duct at cruise and 40 to 44 at idle.
Sorry about the pic quality they coulda been better but this work around works!!!