Server racks, CRAC units and AHUs all share one requirement: the fan must push air through dense, high-resistance paths — filters, coils, cable trays and thousands of small component gaps. That is a static-pressure problem, not just an airflow problem, and it is exactly what SUNXFAN’s backward-curved EC centrifugal blowers are built to solve.
Why high static pressure matters in data centers
- Dense airflow resistance — a server rack behaves like a heat exchanger with high pressure drop; low-static fans stall and stop moving air.
- BC-series reaches up to 1500 Pa, keeping airflow stable even through deep racks and long duct runs.
- Precise thermal control — 0-10V/PWM & Modbus RTU(RS485) lets the fan ramp with rack inlet temperature instead of running flat-out.
How to choose the right model
- Airflow (m³/h) — size for total kW of heat load (roughly 1 kW ≈ 170–200 m³/h).
- Static pressure (Pa) — the denser the rack and longer the duct, the higher the Pa you need.
- Power architecture — 115V/230V AC for standard racks; 310V/800 VDC for facilities running a central DC bus.
- Speed control — 0-10V/PWM for temperature-driven control, Modbus RTU for BMS integration.
- Redundancy — fan-wall arrays share load so a single failure never interrupts cooling.
Recommended models
| Scenario | Model | Voltage | Airflow | Static Pressure | Power | Noise |
|---|---|---|---|---|---|---|
| High-static, 115V | BC280A-E092D1-01 | 115 V AC | 1540 m³/h | 550 Pa | 125 W | 71 dB(A) |
| High-static, 230V | BC280A-E092D3-01 | 230 V AC | 1540 m³/h | 715 Pa | 125 W | 71 dB(A) |
| 1800 m³/h rack row | BC280A-E092E3-02 | 230 V AC | 1800 m³/h | 715 Pa | 200 W | 77 dB(A) |
| Quiet 2000 m³/h | BC280B-E092E3-02 | 230 V AC | 2000 m³/h | 460 Pa | 200 W | 65 dB(A) |
| 115V, 1950 m³/h | BC310A-E092D1-01 | 115 V AC | 1950 m³/h | 715 Pa | 160 W | 64 dB(A) |
| 230V, 2100 m³/h | BC310A-E092D3-01 | 230 V AC | 2100 m³/h | 715 Pa | 160 W | 64 dB(A) |
| Max airflow | BC310A-E092E3-02 | 230 V AC | 2500 m³/h | 715 Pa | 240 W | 74 dB(A) |
| 310V DC bus | DG200D-D092B0-01 | 310 V DC | 1050 m³/h | 305 Pa | 120 W | 59 dB(A) |
| 230V, 1300 m³/h | DG200D-E092E3-01 | 230 V AC | 1300 m³/h | 500 Pa | 190 W | 64 dB(A) |
Bottom Line
For standard server racks on 230V AC, the BC280A-E092D3-01 (1540 m³/h, 715 Pa) offers the best balance of static pressure and efficiency. For high-density rows, step up to the BC310A-E092E3-02 (2500 m³/h, 715 Pa). If your facility runs a central DC bus, the DG200D-D092B0-01 (310 V DC) removes the onboard rectifier and shifts conversion heat out of the rack. Tell us your total heat load and power architecture, and we will confirm the exact fan and speed-control configuration.