Electronic Expansion Valve

• Applicable for all common HCFC and HFC refrigerants such as: R22, R134a, R404A, R407C, R410A, R507A …
• Cooling capacity: 3,5 to 105 kW (R22 nominal capacity)
• 500 steps (full stroke); 32 ± 20 opening steps
• Medium temperature TS min./max.: -30°C /+70°C (duty cycle rate below 50%)
• Ambient temperature min./max.: -30°C / +60°C (duty cycle rate below 50%)
• Relative humidity: : 0 to 95% RH• Installation position: :

– Coil installed in the upwards position, valve rotor             central axis within ±15° versus  vertical axis   – Inlet connection preferably sidewise, outlet                     preferably downwards

Rated voltage: 12V DC(± 10%), rectangular wave
• Actuating mode: 4-phase 8-step permanent magnet
stepping motor of direct-acting type
• Excitation mode: 1 ~ 2 phase excitation, monopole actuation
• Excitation rate:
– Seat Ø 1,3 to 3,2 mm: 30 to 90pps
– Seat Ø 4,0 to 6,5 mm: 30 to 40pps
• Activation of self-holding mechanism: Maintain excitation in
stop position min. 0,1~1,0 sec.
• Min. motion time from completely open to completely closed:
– Seat Ø 1,3 to 3,2 mm: 6s @ 90pps
– Seat Ø 4,0 to 6,5 mm: 13s @ 40pps
• Coil current:
– Seat Ø 1,3 to 3,2 mm: 260mA/phase (20°C)
– Seat Ø 4,0 to 6,5 mm: 375mA/phase (20°C)
• Coil resistance:
– Seat Ø 1,3 to 3,2 mm: 46 ± 3.7 Ω/phase (20°C)
– Seat Ø 4,0 to 6,5 mm: 32 ± 3.2 Ω/phase (20°C)
• Insulation class of coil: E
• Protection class: IP 67

Note:

1) Extent of delivery without coil
2) Nominal working conditions: Condensing Temperature 38°C; Evaporating Temperature 5°C; Sub-cooling 0K; Superheat 0K
3) Nominal capacity is got at 480 fully open pulses of linear flow curve

This information is based on values calculated using the NIST REFPROP Database (NIST Standard Reference Database 23, Version 9.0, Lemmon, E. W., Huber, M. L.,and McLinden, M. O., Thermophysical Properties Division, 2010).

Critical temperature: 71°C

Saturation points (bubble and dew points at same composition).