Parker Bipolar electric expansion valves

The SER, SERI and SEHI are Electronically Operated Step Motor flow control valves, intended for the precise control of liquid refrigerant flow. Valve pistons and ports are uniquely characterized, providing extraordinary flow resolution and performance; the SER, SERI and SEHI valves are also easily interfaced with microprocessor based controllers.

Bipolar electric expansion valves


  • Available for R744, R1234ze, R32, R134a, R404A, R407A, R407C, R407F, R410A, R448A, R449A, R450A, R513A, R507
  • Capacity range: 2.4 to 3200kW divided on 14 models
  • Resolution: from 2500 to 6386 step
  • MRP: from 90 to 34 bar depending on the model
  • Multipurpose Wide range up to 2,8 Mw with single valve
  • High reliability
  • Refrigerants HFC, HFO, Blends
  • Where applicable, Atex approval II 3G Ex nA IIC T6 Gc
  • Efficient Low power design & high resolution
  • Dedicated family of valves available for applications with oil-free compressors


Know-How Article

Energy optimization of refrigeration systems
Energy optimization of refrigeration systems