Automatic liquid drainer is a combination of a float switch , 3/4" solenoid valve assembly. and 1/4" hand expansion valve, as well as necessary pipe and fittings, complete for field assembly as shown in figure.
All are heavy duty devices intended for use with Ammonia , R-22, R-502 and other common refrigerants.
The purpose of automatic liquid drainer is to permit flow of liquid refrigerant only and to prevent the flow of vapour refrigerant. It is intended for use in draining liquid from defrosting evaporators, or heat recovery condensers ,into a lower pressure portion of the system.