DBF - Electronic expansion valve

The DBF series is a range of electronic expansion valves designed for HVAC/R applications, particularly for commercial air conditioning systems and heat pumps.

Thanks to its balanced flow port design, the valve allows for extremely precise refrigerant regulation in both forward and reverse flow conditions. This allows operation to be tailored to the actual needs of the system, improving temperature control, response speed, and overall energy efficiency.

The wide modulation range (up to 500 steps) allows for accurate load management, ensuring optimal operating conditions and contributing to the reduction of energy consumption.

• Type: electronic expansion valve
• Application: HVAC systems, heat pumps and commercial refrigeration
• Capacity range (R410A): 10 ÷ 120 kW
• Compatible refrigerants:
• HFCs, HFOs and blends (R134a, R404A, R407C, R410A, R448A, R449A, R450A, R452A, R513A, R507A)
• Flammable refrigerants (R32, R290, R1234ze, R1234yf)
• Fluid temperature: -30°C ÷ +80°C
• Ambient temperature: -30°C ÷ +60°C
• Relative humidity: 0 ÷ 95% RH
• Adjustment: 500 steps (full stroke)
• Differential pressure (forward/reverse flow): up to 35 bar
• Protection class: IP67

Electrical characteristics

• Rated voltage: 12 VDC (±10%)
• Actuator: Permanent magnet stepper motor (4 phase, 8 steps)
• Coil current: 260 mA/phase
• Coil resistance: 46 ± 3.7 Ω/phase
• Full stroke time: 13 s

Construction and functional features

• Compact design and low weight
• Balanced flow port for precise control
• Bidirectional operation (ideal for reversible systems)
• Recommended installation:
• vertical with coil facing upwards
• horizontal input / vertical output
• Compatible with Sanhua SEC series controllers

Available models

Available versions of the Ubbink Vapour Barrier range

Strengths

• Precise control of refrigerant flow
• High energy efficiency of the system
• Compatibility with traditional and natural refrigerants
• Bidirectional operation for heat pumps
• Compact and flexible installation
• Reliability in extended environmental conditions

• Commercial air conditioning systems
• Reversible heat pumps
• HVAC/R Systems
• Industrial refrigeration
• Systems with low GWP or flammable refrigerants