Electronic Expansion Valve VPF

Features

• Energy saving thanks to veryprecise capacity control: Up to 3800 steps
• Internal Tightness like a solenoid valve
• Optimized flow path design for noise reduction
• Applicable for reversible systems like heat pumps: bidirectional flow
• Corrosion resistant design, long lifetime, high realiability
• Compact design
• Models with integrated sight glass are available

General specification

• Applicable for all common HCFC, HFC and HFO refrigerants such as:
  R22, R134a, R404A, R407A, R407C, R407C, R407F, R410A, R507A, R1234ze…
• Cooling capacity: 54 to 1495 kW (R134a nominal capacity)
• Up to 3800 steps (full stroke); Valve starts opening with
  – VPF12.5, VPF25: 110 steps
  – VPH50…VPF400: 165 steps
• Medium temperature TS min./max.: -40°C / +90°C
• Ambient temperature min./max.: -40°C / +60°C
• Relative humidity: : 0 to 100% RH
• Installation position:
  – Major flow direction from connection A to B
  – Installation in horizontal and vertical pipes possible
  – Installation position in horizontal lines with stepper motor preferably upwards
• Certifications: EAC and PED Declaration

Electrical Parameters

• Rated voltage: 12V DC, rectangular wave
• Actuating mode: 2-phase 4-step permanent magnet stepping motor
• Excitation mode: 2 phase excitation, bi-pole actuation
• Excitation rate:
  • – 150 pps (Maximum for voltage drive)
  • – 300 pps (Maximum for current drive)
• Motion time from completely open to completely closed (voltage drive/current drive):
  • – VPF12.5…VPF50: 17,3s / 8,7s
  • – VPF100: 23,3s / 11,7s
  • – VPF150…VPF400: 25,3s / 12,7s
• Nominal motor current*:
  • – Voltage drive: 124mA RMS per phase in control operation
  • – Current drive: 100mA RMS per phase in control operation
• Peak motor current*:
  • – Voltage drive: 238mA RMS per phase in control operation
  • – Current drive: 140mA RMS per phase in control operation
• Coil resistance: 52 ± 5,2Ω/coil (20°C)
• Insulation class of coil: E
• Protection class: IP 67