OK, for our english friends here an descripton for changing gas in sensor of an TXV:
You need an TXV, it sould have an Outlet to Braze! If possible, use outer pressure compensation.
it`s very easy when the bulb has 2 captubes already, older Danfoss Valves have this.
You have to let out the pressure, after this you braze an Schrader Valve on the Bulb/ Sensor.
That was it Now you can pull vacuum and fill it with the gas you want (as a number, start with 5bar, in my R14 TEV is about 10-13bar )
The difficould thing is the very, very less volume of the bulb. If you take off your filling hose, pressure has gone!
You need a quick coupler like this:
http://kaeltetechnik-shop.at/Schnell...g-16C-Imperial
And then it should work!
In lower stages of cascades, note:
I had some problems because TXV was leaking at superheat screw. Never try to move this screw when TXV is cold, and always put on the cap before cool-down. At room temperatur it is normalle leak-free.
An little reciever like an 50g- filter dryer is enough, you save refrigerant (R14 is expensive!)
