Why Are SVG/APF Devices So "Choosy" About Fans?
Categories:
Technology
Author:
rain
Origin:
Time of issue:
2025-12-19 17:30:58.507
Views:
2026 Fan Selection Trend Forecast (APF/SVG Applications)
Trend 1: Static Pressure Takes Priority Over Airflow
"Being able to push air through" matters more than "moving large volumes of air".
Trend 2: Domestic Fans Enter the Engineering - Ready Phase
No longer just backup options, they have become secondary supply sources and cost - optimization solutions.
Trend 3: Total Cost of Ownership (TCO) Gains Prominence
A single fan failure translates to shutdown costs + operation and maintenance costs + risk costs.
In filter, SVG, and APF devices, cooling fans are not mere accessories but critical components that determine whether the equipment can operate at full load for an extended period.
SVG/APF devices are extremely selective when it comes to fans, primarily due to four rigid constraints: high power - density heat generation, 24/7 continuous operation, harsh outdoor/industrial environments, and the air duct characteristics of enclosed cabinets. The airflow, static pressure, service life, protection level, intelligent control capabilities, and compatibility of a fan directly impact the equipment's reliability and lifespan. Ordinary fans are prone to breakdowns caused by overload, corrosion, dust accumulation, or mismatched specifications.
I. The Reasons for Being "Choosy": Four Core Pain Points
1.High Heat Generation and High - Impedance Air Ducts:
Core components such as IGBTs and reactors generate heat continuously (for instance, the power consumption of a 100kvar SVG/APF module is approximately 3kW). Moreover, most devices adopt enclosed cabinets, which result in high air duct resistance. Ordinary fans, lacking sufficient airflow and static pressure, often lead to module overheating - induced tripping and derated operation.
2.Long - term, High - load Operation:
The equipment is required to run 24 hours a day, 7 days a week. Ordinary fans, typically equipped with oil - impregnated bearings that have a short service life (around 10,000 hours), are susceptible to premature failure, triggering frequent equipment alarms and high operation and maintenance costs.
3.Challenges from Harsh Environments:
These devices are frequently installed in outdoor areas, power distribution rooms, coastal regions, etc., exposing them to high temperatures (ranging from - 20℃ to + 70℃), heavy dust, salt spray, and humidity. Ordinary fans with inadequate protection are prone to rust, jamming, and reduced insulation performance.
4.Intelligence and Energy Efficiency Requirements:
Traditional fans running at full speed produce excessive noise and consume high power, failing to meet energy - saving and operation and maintenance standards. Precise speed regulation, fault feedback, and remote monitoring functions are essential, but ordinary fans lack compatible interfaces for these features.
II. Key Technical Thresholds (Differences Between Ordinary and Specialized Fans)
Indicator | Requirements for Specialized Fans | Drawbacks of Ordinary Fans | Impact |
Airflow/Static Pressure | High airflow (e.g., 51% higher) and high static pressure (e.g., 44% higher) to adapt to high - impedance air ducts | Low airflow and static pressure, making it difficult to penetrate dense heat - dissipation channels | Insufficient heat dissipation, overheating protection activation of modules, and shortened service life |
Service Life | Dual - ball bearings, 30,000-70,000 hours of service life, and wide temperature range (- 20℃ to + 70℃) | Short service life of oil - impregnated bearings (less than 10,000 hours) and narrow temperature range | Frequent fan replacements, high operation and maintenance costs, and equipment downtime |
Protection Level | IP55 or above, dust - proof, salt spray - resistant, and fire - retardant (PBT material meeting UL94V - 0 standard) | IP20 - IP40 protection level, vulnerable to dust accumulation, water ingress, and corrosion | Fan jamming, reduced insulation, and potential safety hazards |
Intelligent Control | Support for PWM speed regulation, RD speed detection, FG fault feedback, and remote monitoring | No speed regulation or feedback functions, operating at full speed continuously | High noise, high power consumption, and no early warning for potential faults |
Structural Compatibility | Matched with cabinet air ducts (e.g., axial flow, centrifugal, or blower type selection) and low vibration | Incompatible size and installation, prone to resonance | Module damage caused by vibration, excessive noise, and reduced heat - dissipation efficiency |
III. Key Considerations for Selecting Specialized Fans
1.Performance Matching:
Prioritize models with high airflow (e.g., 80+CFM) and high static pressure (e.g., 1000+Pa). Match the fan with the air duct impedance based on its P - Q curve to ensure it can push air through high - resistance heat - dissipation channels effectively.
2.Long Service Life and Wide Temperature Range:
Opt for fans with dual - ball bearings, a service life of at least 30,000 hours, and an operating temperature range covering - 20℃ to + 70℃ to adapt to extreme working conditions.
3.High Protection Level and Quality Materials:
Choose fans with an IP55 or higher protection rating, salt spray - resistant coating, and fire - retardant PBT material complying with UL94V - 0 to enhance durability.
4.Intelligence and Compatibility:
Select fans that support PWM speed regulation and the output of speed/fault signals, which can be integrated with the equipment monitoring system to achieve speed reduction under low - load conditions for energy conservation and noise reduction.
5.Structural Compatibility:
Select axial flow, centrifugal, or blower fans according to the cabinet air duct design to avoid resonance and improve overall heat - dissipation efficiency.
IV. Typical Cases and Associated Risks
Case Study
The SVG equipment at a wind farm experienced negative pressure increase and fan vibration damage due to clogged dust - proof cotton in summer, as the ordinary axial flow fan used had insufficient protection. This led to frequent module tripping caused by overheating.
Risks
Using ordinary fans can shorten the equipment's service life by 30% - 50%, increase operation and maintenance costs, and even trigger grid - side faults.
Selecting a fan for SVG/APF equipment is not about choosing an accessory but a core component that ensures reliability. It is essential to comprehensively consider factors such as airflow, static pressure, service life, protection level, intelligent control, and structural compatibility. Industrial - grade specialized fans like Sanyo Denki's San Ace series are highly recommended to guarantee long - term stable operation.
Sanyo Denki (San Ace)
Core Advantages: An industry benchmark with leading contra - rotating fan technology and outstanding static pressure/airflow performance.
Key Features for SVG/APF Applications: Dual - ball bearings (30,000-70,000 hours of service life), wide temperature range (- 20℃ to + 70℃), PWM speed regulation, and fire - retardant PBT material meeting UL94V - 0 standard.
Key Selection Guidelines
1.Prioritize fans with dual - ball bearings (service life ≥ 30,000 hours), a wide temperature range (- 20℃ to + 70℃), and an IP55 or higher protection rating for outdoor, dusty, or salt spray - exposed environments.
2.Ensure the fan supports PWM speed regulation and the output of speed/fault signals (RD/FG signals) to meet the intelligent monitoring requirements of SVG/APF equipment.
3.Compile a specialized fan selection list (including model, airflow, static pressure, protection level, and interface) based on common SVG/APF cabinet specifications.
Recommended Sanyo Denki Fan Models
（1）9CRA0612P6K001
Dimensions: 60mm × 60mm × 38mm
Airflow: 80.5CFM
Static Pressure: 1130Pa
Protection Level: IP55
Bearing Type: Dual - ball
Control/Interface: DC12V, PWM/RD/FG
Application Scenarios: High - impedance air ducts and small - power dense module setups.
（2）San Ace 80L 9LG0812P4J001
Dimensions: 80mm × 80mm × 38mm
Airflow: 92CFM
Static Pressure: 980Pa
Protection Level: IP55
Bearing Type: Dual - ball
Control/Interface: DC12V, PWM/RD/FG
Application Scenarios: Medium - sized cabinets and outdoor/coastal salt spray - prone environments.
（3）San Ace 120 9CR1212P5G001
Dimensions: 120mm × 120mm × 38mm
Airflow: 200CFM
Static Pressure: 1050Pa
Protection Level: IP55
Bearing Type: Dual - ball
Control/Interface: DC12V, PWM/RD/FG
Application Scenarios: Large - scale SVG/APF integrated cabinets and outdoor dusty environments.
The protection level of a fan directly affects the operational stability, service life, and safety factor of SVG/APF equipment in various environments. Its core impacts focus on three aspects: dust prevention, water resistance, and corrosion protection. This is especially crucial for equipment deployed in harsh settings such as outdoor areas, dusty regions, and coastal zones.
Capital Technology Co., Limited is the chief agent of SANYO DENKI, one of the leading enterprises of the cooling fan industry. We are a factory who also have our own independent brand CAPITAL product series. The main products are cooling fan, DC/AC fan, radiator, filter, reactor etc. We can provide customer with the most professional and perfect technical support, welcome to contact me at anytime at rainlee@szcpt.com.
Previous: Sanyo Denki San Ace Fans: Applications in Medical Equipment
Related Products
There is currently no content to display
Contact Us
Capital Technology Co., Limited
Tel: 0755-27087416 / 18316996909
Fax: 0755-23076120
QQ:1516156057 / 403432958
E-mail: sales@szcpt.com
Add: 111,Building B,Qianwan Zhichuang,Gushu Xiaweiyuan,Xixiang Street,Baoan District,Shenzhen
Mobile website