STF Reversing Valves

The STF Reversing Valves series includes 4-way reversing valves used in reversible refrigeration systems such as heat pumps, reversible air conditioning units, and chillers. These valves switch the refrigerant flow path to reverse the refrigeration cycle, allowing equipment to change between cooling and heating operation. The series uses a pilot-solenoid-actuated slider mechanism to deliver rapid changeover at low pressure differential while reducing the risk of incomplete shifting, leakage, and unnecessary pressure drop. STF valves are offered across a broad range of capacities, connection sizes, and body configurations, with variants for multiple refrigerants and corresponding coil options matched to specific valve families. Overall, the STF Reversing Valves family is intended for reversible HVAC and refrigeration applications that require dependable cycle reversal, broad application coverage, and stable valve performance under changing operating conditions.