Which components are typically involved in a refrigerant pump system?

The components typically involved in a refrigerant pump system encompass various critical parts that work together to circulate refrigerant and maintain an efficient cooling cycle. The inclusion of the pump discharge, check valve, and metering device is essential as these components facilitate the movement and regulation of refrigerant within the system.

The pump discharge is responsible for directing the refrigerant to the next stage after it has been pressurized, ensuring it flows efficiently into the designated areas of the system. The check valve plays a crucial role by preventing backflow, which maintains the correct operational pressure and flow direction, thus protecting system integrity. Lastly, the metering device is vital for controlling the amount of refrigerant that enters the evaporator, ensuring the system operates effectively and preventing overfeeding or underfeeding of the refrigerant.

While the other options list individual components critical to refrigeration cycles, they do not collectively represent the key aspects of a refrigerant pump system in the same manner as the correct answer does. Each plays a specific role, but the stated combination in the correct choice outlines the primary functional components needed for the pump system.