SANHUA ELECTRONIC EXPANSION VALVE (DBF12 series)

Key Features of Sanhua DBF Series EEVs

Bidirectional Flow (Reversible Systems): The valves feature a balanced flow port design, which allows for accurate, bidirectional adjustment of the refrigerant flow. This makes them ideal for reversible systems, such as heat pumps, where the flow direction changes between heating and cooling modes.
High Pressure Difference Capability: The balanced flow port design can handle a forward and reverse pressure difference of up to 35 bar (or 3.5 MPa), ensuring reliable operation across various system conditions.
Precise Control & Energy Efficiency: The wide adjustment range ensures the valve can accurately match the system’s actual load. This keeps the system operating at its optimal working condition, leading to accurate temperature control, rapid cooling/heating, efficient defrosting, and overall reduced energy consumption.
Compact Design: The valve body and coil have a compact design, which helps to significantly reduce the required installation space.
Quick Action: The valves are designed for fast operation, contributing to system responsiveness.
Compatibility: They are compatible with Sanhua’s SEC series controllers.

Parameter	Specification
Application	Commercial Air Conditioning and Heat Pumps
Refrigerants	Applicable for common HFC, HFO, and many flammable refrigerants, including: R134a, R404A, R407C, R410A, R448A, R449A, R450A, R452A, R454B, R513A, R507A, R32, R290, R1234ze(E), R1234yf.
Cooling Capacity (R410A)	Approximately 10 kW to 120 kW (The exact capacity depends on the specific valve model within the DBF series, like the DBF04H, DBF05H, etc.)
Full Stroke Steps	500 steps (Full stroke)
Opening Steps	Typically 32 ± 20 opening steps (Check specific model datasheet for variations like 42 ± 30 steps mentioned for some DBF models).
Medium Temperature Range	$-30^{\circ}\text{C}$ to $+80^{\circ}\text{C}$ (at duty cycle rate below 50%)
Ambient Temperature Range	$-30^{\circ}\text{C}$ to $+60^{\circ}\text{C}$ or $+80^{\circ}\text{C}$ (at duty cycle rate below 50%)
Rated Voltage	12V DC ( $\pm 10\%$ , rectangular wave)
Actuating Mode	4-phase, 8-step permanent magnet stepping motor of direct-acting type.
Full Stroke Time	Approximately 13 seconds (at an excitation rate of 40pps)
Protection Class	IP67

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DATA SHEET & MODELS