R4 is a portable refrigeration oil transfer pump which is ideal for charging compressor oil into large HVAC systems. With a 1/3 HP electric motor directly coupled to a fixed-displacement gear pump, oil can be pumped into your system even while in operation.

Built-in thermal-overload protector for effectively preventing overloaded and a ball-type check valve is installed inside of the pump to prevent oil or refrigerant from flowing back in case of a power failure or breakdown. Keep the system in safety situation.