Product Details
1. Product Introduction
Shenzhen Mingyang Purification Technology Co., Ltd. With over a decade of expertise in air purification, the company specializes in R&D and production of primary, medium, and high-efficiency air filters and air conditioning filter screens. Products are widely used in central air conditioning systems, cleanrooms, industrial plants, and other air purification applications. The sub-frame primary air filter is the core primary filtration product designed for harsh conditions and high dust-holding capacity, serving as the preferred pre-filtration solution for ventilation and air conditioning systems.
The Mingyang APP sub-frame primary air filter uses a detachable panel aluminum alloy frame as the base structure, reinforced with aluminum or plastic corner brackets. The core support is a φ4.0mm thick galvanized iron wire sub-frame mesh with added reinforcing ribs. The filter media is made of high-quality non-woven fabric and polyester synthetic fiber, using air pressure adsorption as the filtration principle. It meets G3 (80%) and G4 (90%) efficiency standards by weight method, primarily filtering particles ≥5μm such as dust, hair, and fibers.
Designed for harsh working environments, the product features a robust, impact-resistant, and deformation-resistant structure. The detachable outer frame allows separate filter media replacement and frame reuse. It offers low ventilation resistance and high dust-holding capacity, effectively extending the service life of downstream medium-efficiency filters. It is suitable for pre-filtration in centralized ventilation and air conditioning systems in large buildings, industrial plants, and cleanrooms. Non-standard sizes can be customized to meet diverse customer needs.
2. Key Product Features
- 2.1 High-strength frame, resistant to harsh operating conditions: The detachable panel aluminum alloy frame, reinforced with aluminum or plastic corner brackets, provides a sturdy and stable structure. Even in harsh environments with vibration, high airflow, and high dust concentration, it effectively prevents filter deformation and damage, ensuring long-term stable operation.
- 2.2 Detachable design, cost reduction through recycling: The frame uses a modular detachable structure. When the filter media reaches its service life, only the media core needs replacement. The aluminum alloy frame and sub-frame mesh can be reused, significantly reducing consumable procurement costs, aligning with green and eco-friendly concepts, and lowering long-term operating expenses.
- 2.3 Low resistance, high dust holding capacity, improving ventilation efficiency: The sub-frame filter mesh features dedicated reinforcing ribs that optimize airflow channels, enhancing structural strength while reducing air resistance. The fluffy filter media combined with a reasonable frame layout achieves high dust-holding capacity, reducing cleaning and replacement frequency, and extending maintenance cycles.
- 2.4 High-quality filter media, washable and durable with long service life: The filter media uses high-toughness non-woven fabric and polyester synthetic fiber, offering excellent washability and tensile strength. It can be cleaned and reused multiple times, with a service life far exceeding ordinary primary filter materials under normal maintenance, and stable filtration efficiency without significant degradation.
- 2.5 Graded filtration, protecting downstream filter equipment: The filter media uses a fluffy, gradually densifying fiber structure that efficiently intercepts large particles, preventing them from clogging downstream medium and high-efficiency filters. This effectively extends the service life of high-precision filtration equipment and reduces overall air purification system maintenance costs.
- 2.6 Standardized dimensions, wide installation adaptability: The filter uses industry-standard outer frame dimensions, directly compatible with filter sections of various central air conditioning and centralized ventilation equipment. Installation requires no additional modifications, and removal and replacement are simple, operable by a single person, adapting to different brands and models of ventilation and air conditioning systems.
3. Product Applications
3.1 Ventilation and air conditioning systems in large civil buildings
Suitable for pre-filtration in central air conditioning and centralized ventilation systems in large civil buildings such as offices, conference rooms, hospitals, shopping malls, airports, high-speed rail stations, and stadiums. It efficiently intercepts large particles like dust, hair, and fibers, improving indoor air cleanliness while protecting the heat exchange equipment inside the air conditioner, reducing efficiency loss due to dust accumulation.
3.2 Pre-filtration for ventilation in ordinary industrial plants
Suitable for pre-filtration in centralized ventilation and air conditioning systems in general industrial plants such as machining, textile, and hardware. The high-strength frame withstands harsh conditions like equipment vibration and high-speed air impact. High dust-holding capacity reduces frequent maintenance, effectively intercepts industrial dust, improves the workshop environment, and protects ventilation equipment.
3.3 Pre-filtration for clean rooms
As a pre-filtration device for centralized ventilation and air conditioning systems in cleanrooms of electronics, pharmaceutical, food, and optics industries, it effectively filters large particles, reducing the load on subsequent medium and high-efficiency filters. It delays clogging of high-precision filters, ensures cleanroom air cleanliness levels, and lowers overall maintenance costs of the cleanroom filtration system.
4. Product Technical Parameters
4.1 Basic Parameters
| Project | Detailed Specifications |
|---|---|
| Product Name | Sub-frame primary filter |
| Brand | Mingyang |
| Model Series | APP sub-frame primary filter series |
| Frame Material | Aluminum alloy profile (detachable plate type) |
| Support structure | φ4.0mm thick galvanized iron wire sub-frame mesh with reinforcing ribs |
| Fixing accessories | Aluminum alloy corner / Plastic right angle |
| Filter Media Type | Non-woven fabric, polyester synthetic fiber |
| filtration principle | Air Pressurization Adsorption Method |
| Gravimetric Efficiency | G3（80%）、G4（90%） |
| Applicable Filtration Target | Air purification, mainly filters ≥5μm dust particles, hair, fibers, etc. |
| Initial resistance at rated airflow | ≤85Pa (G3) / ≤110Pa (G4) |
| Product features | Robust structure, detachable, low resistance, high dust-holding capacity, washable, reusable frame |
| Quality Standards Implemented | GB/T 14295-2019 |
| Application Fields | Pre-filtration for ventilation and air conditioning systems in civil buildings, industrial plants, clean rooms, etc. |
Rated parameters of common specifications for APP sub-frame series
| Model | Specification Class | Dimensions W×H×D (mm) | Filter area (m²) | Rated airflow (m³/h) | Initial Resistance 70% (Pa) | Initial Resistance 100% (Pa) |
|---|---|---|---|---|---|---|
| APP 6605-G3 | G3 | 595×595×46 | 0.6 | 3600 | 65 | 85 |
| APP 5605-G3 | G3 | 495×595×46 | 0.5 | 3000 | 65 | 85 |
| APP 5505-G3 | G3 | 495×495×46 | 0.42 | 2500 | 65 | 85 |
| APP 3605-G3 | G3 | 290×595×46 | 0.3 | 1800 | 65 | 85 |
| APP 6605-G4 | G4 | 595×595×46 | 0.6 | 3600 | 70 | 110 |
| APP 5605-G4 | G4 | 495×595×46 | 0.5 | 3000 | 70 | 110 |
| APP 5505-G4 | G4 | 495×495×46 | 0.42 | 2500 | 70 | 110 |
| APP 3605-G4 | G4 | 290×595×46 | 0.3 | 1800 | 70 | 110 |
Note: The above are only some common specifications and models. Shenzhen Mingyang Purification Technology Co., Ltd. Custom non-standard sub-frame primary air filters can be made according to actual installation space, airflow requirements, and working conditions. Custom products comply with GB/T 14295-2019 national standard and undergo strict resistance and efficiency tests before delivery, ensuring filtration performance and stability.
5. FAQ
How to clean and replace the filter media of the sub-frame pre-filter?
The filter media can be gently rinsed with low-pressure clean water (water pressure ≤0.3MPa) or compressed air (air pressure ≤0.4MPa) along the fiber direction. Neutral detergent can be used to remove stubborn stains. Reverse rinsing, high-pressure water/air impact, and strong acid/alkali cleaners are prohibited. After cleaning, air dry naturally in a cool, ventilated place, avoiding direct sunlight and high-temperature drying. If the filter media is damaged, deformed, or its filtration efficiency significantly decreases after 3-5 cleanings, the aluminum/plastic corner brackets can be removed to replace only the filter media core. The frame can be reused if undamaged.
5.2 How to select between G3 and G4 grade sub-frame primary air filters?
Select based on the cleanliness requirements of the application scenario and the protection needs of downstream filtration equipment:G3 gradeCost-effective, suitable for scenarios with high dust content but general filtration precision requirements, such as ventilation pre-filtration in ordinary industrial plants, shopping malls, airports, and other civil buildings.G4 gradeHigher filtration precision, suitable for scenarios requiring stricter pre-filtration, such as pre-filtration in hospitals, food processing workshops, and cleanrooms. It intercepts impurities more efficiently, better protecting downstream medium and high-efficiency filters.
5.3 What are the core differences between sub-frame primary air filters and ordinary panel primary air filters?
The core differences lie in structure and application conditions: The sub-frame primary air filter features a φ4.0mm thick galvanized iron wire sub-frame mesh with reinforcing ribs, offering stronger structure, impact resistance, and deformation resistance, suitable for harsh industrial environments. It has a detachable design, allowing frame reuse. Ordinary panel primary air filters lack sub-frame support, have a simple structure, and are suitable for mild conditions in civil buildings. They are mostly disposable integrated structures, leading to higher long-term costs. Additionally, the sub-frame type has higher dust-holding capacity, effectively extending maintenance cycles.
How to determine the daily maintenance cycle of the sub-frame pre-filter?
The routine maintenance cycle depends on the dust concentration of the environment: For ordinary civil buildings, clean every 1-2 months; for industrial plants with high dust concentration, clean every 15-30 days. When the pressure difference across the filter reaches twice the initial resistance, immediately clean or replace the filter media. Under normal use, the filter media lifespan is about 6-12 months; in harsh conditions, shorten the replacement cycle appropriately.
6. Brand & Service Guarantee
Shenzhen Mingyang Purification Technology Co., Ltd. Founded in 2008, with 17 years of experience in R&D and production of air filtration equipment, the company is certified under ISO9001 Quality Management System and ISO14001 Environmental Management System. Equipped with advanced automated production and testing equipment, all products pass national authority tests. The sub-frame primary air filter undergoes rigorous working condition simulation tests, ensuring reliable quality.
