Flow Controls are required in the HVAC/R system to protect and control against any discrepancies, damage or failure. System protectors increase the reliability of the refrigeration system by capturing and controlling contaminants such as moisture, acid, debris, resin, and wax. Valves provide precise control of the refrigerant flow to maximize system performance or the ability stop flow completely when required. Oil management is critical to ensuring the reliable operation of the equipment while simultaneously maintaining high system performance. Temperature pressure controls protect the system from damage during abnormal operating conditions and provide control during compressor cycling, pump-down and defrost conditions.