4-Way Reversing Valve

DSF Series


The DSF series 4-way reversing valve is applicable to all kinds of heat pump systems. It changes the flow path of refrigerants by controlling the pilot valve to switch the mode between cooling and heating.

  • Realiably instantaneous changeover under minimum pressure differential
  • Wide range of capacity and connection styles
  • Application spectrum has extended into system under potentially explosive conditions
  • DFS(S) stainless stell material usage reduces heat loss and improves efficiency
  • Available with special design configuration for system of  heating mode as main function
  • Built-in chip energy-saving coil on request

Declaration according to PED, LVD, IECEx and UL

Technical Data
  • Applicable Refrigerants: R134a, R407C, R404A, R410A, and R32
  • Applicable Relative Humidity: ≤95%
  • Medium Temperature: -30°C~+120°C
  • Ambient Temperature: -30°C~+70°C
  • Max. Working Pressure: 4.2 ~ 4.5 MPa

DRVB Series


DRVB series change the flow path of refrigerants by controlling the action of small DSF valve to switch the mode between cooling and heating.

  • X-cross design ensures big flow area and low pressure drop
  • Stability and reliability ensured by adopting a small 4-way valve as the pilot valve
  • Built–in self-lubricating bush;
  • Special material of seal ring ensures the valve’s applicability to all common refrigerants
  • For flange connection, please contact us

UL, Declarations according to PED

Technical Data
  • Applicable Refrigerants: R134a, R407C, R404A,  R410A and R32
  • Max. Working Pressure: 4.9 MPa
  • Max. Working Pressure Differential: 3.1 MPa
  • Min. Working Pressure Differential: 0.3~0.4 MPa
  • Medium Temperature: -30°C~ 130°C
  • Ambient Temperature: -20°C ~ 55°C
  • Applicable Relative Humidity: ≤95%
  • Allowable Voltage Fluctuations: 85%  ~ 110&
  • Standard Coil: AC 220V

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