TEV/TXV open/close
TEV/TXV open/close
(OP)
We had an interesting discussion today about Airco TXV's. We left we two questions. Most TXVs are no-bleed types, meaning after compressor shut-off they close and block refrigerant entering the evaporator.
Question1: how can the TXV remain closed after shut-off? The suction line will slowly warm up to ambient temperature, the bulb will wam up and the bulb pressure will rise to open the valve.
Question2: is a typical TXV closed or open at atmospheric pressure and ambient temperature?
Any ideas?
Question1: how can the TXV remain closed after shut-off? The suction line will slowly warm up to ambient temperature, the bulb will wam up and the bulb pressure will rise to open the valve.
Question2: is a typical TXV closed or open at atmospheric pressure and ambient temperature?
Any ideas?





RE: TEV/TXV open/close
2. Open; no back pressure to keep it closed