... in unfavorable temperature and shocking environmentCopper alloy valve body, stainless steel core, durableCoolant control valve (manual) for vehicle air conditioner, ... of the split air conditioning, which connect, open or close the refrigerant liquid line, vacuumize and charge refrigerant ... between the outdoor unit and indoor unit) Temper: Hard or Soft Production Standard: R22, R407C, R410A, R134A etc ...