Danfoss ETS 50-100-034G0508 electric expansion valve Technical data
Compatible refrigerants
Wide range for all common refrigerants R22, R134a, R404A, R407A, R407C, R407F, R422B,
R422D, R438A, R448A, R449A, R450A, R452A, R507, R513A, R410A, R1234ze and other
refrigerants.
Special valves for R744 (CO2) are available.
For other refrigerants, please contact your local Danfoss representative.
Refrigerant oil All mineral oils and ester oils and special ETS 250 and ETS 400 support oil free applications
Comply with P.E.D. Yes
Max. opening pressure
differential (MOPD) normal flow
33 bar (478.6 psi)
Max. opening pressure
differential (MOPD) reverse flow
ETS 12.5, ETS 25, ETS 50, ETS 100: 33 bar (478.6 psi)
ETS 250, ETS 400: 10 bar (145 psi)
Max. working pressure (PS/MWP)
ETS 12.5, ETS 25, ETS 50, ETS 100: 45.5 bar (660 psig)
ETS 250, ETS 400: 34 bar (493 psig)
Inlet fluid temperature -40 °C – 65 °C (-40 °F – 149 °F). For higher temperature valve, please contact Danfoss.
Ambient temperature -40 °C – 60 °C (-40 °F – 140 °F)
Material of Construction
ETS 50, ETS 100: Body and AST enclosure in brass, connections in bi-metal
(stainless steel/copper).
ETS 12.5, ETS 25, ETS 250, ETS 400: Body and AST enclosure in brass, connections in copper.
Danfoss ETS 50-100-034G0508 electric expansion valve data
Motor enclosure IP67
Stepper motor type Bi-polar - permanent magnet.
Step mode 2 phase full step.
Phase resistance 52 Ω ±10%
Phase inductance 85 mH
Step angle
7.5° (motor),
0.9° (lead screw),
Gearing ration 8.5:1. (38/13) 2 :1
Nominal voltage
Constant voltage drive: 12 V dc -4% – 15%,
150 steps/sec.
Phase current Using chopper drive: 100 mA RMS -4% – 15%
Holding current
Constant voltage drive: Depends on application.
Chopper drive: full current allowed (100% duty cycle)
Max. total power Voltage / current drive: 5.5 / 1.3 W (UL: NEC class 2)
Step rate
Constant voltage drive: 150 steps/sec.
Chopper current drive: 0 – 300 steps/sec. 300 recommended
Total steps
ETS 12.5, ETS 25, ETS 50: 2625 [160 / -0] steps
ETS 100: 3530 [160 / -0] steps
ETS 250, ETS 400: 3810 [160 / -0] steps
Full travel time
ETS 12.5, ETS 25, ETS 50: 17 / 8.5 sec. (voltage / current)
ETS 100: 23 / 11.5 sec. (voltage / current)
ETS 250, ETS 400: 25.4 / 12.7 sec. (voltage / current)
Lifting height
ETS 12.5, ETS 25, ETS 50: 13 mm (0.5 in.)
ETS 100: 16 mm (0.6 in.)
ETS 250, ETS 400: 17.2 mm (0.7 in.)
Reference position Overdriving against the full close position
Electrical connection M12 connector
Compatible Danfoss controllers Danfoss EKE 1A, EKE 1B, EKE 1C, MCX061V, MCX152V and more
