Introduction to Primary Air Filtration

In HVAC and industrial ventilation systems, primary air filters (G1CG4) are the first line of defense against airborne contaminants. They are designed to capture coarse particles larger than 5 microns, such as dust, fibers, and larger debris, protecting both the system and downstream filters.

Types and Materials

Primary filters are available in several formats―panel type, pleated type, and bag type―each suited for different installations. Frame options include paperboard, galvanized steel, or aluminum, while filter media ranges from synthetic nonwoven fabric and nylon mesh to activated carbon media and perforated metal screens. Protective layers often consist of powder-coated wire mesh or galvanized wire mesh on both sides for reinforcement.

Typical Applications

• Central air conditioning and ventilation systems as prefilters.

• Large-scale compressors to block dust before intake.

• Clean return air systems in commercial facilities.

• Prefiltration for localized HEPA units, ensuring extended life of high-efficiency filters.

• In many cases, these filters are also applied in single-stage ventilation systems where only basic dust removal is required.

Maintenance Practices

Maintenance of primary filters is essential to maintain clean airflow:

1. Replacement cycle: 1C6 months, depending on environmental cleanliness.

2. Performance checks: Dust particle counters are recommended every two months; if results deviate from standards, investigate possible leaks or HEPA failure.

3. Replacement procedure: Always replace filters with the system powered down to avoid contamination bypass.

The Role of HICLOVER Automatic Roll Air Filters

While traditional primary filters require manual replacement, industries worldwide are moving towards automation. The HICLOVER Automatic Roll Air Filter integrates coarse filter media into a PLC-controlled roll system. As dust accumulates and resistance rises, the filter media advances automatically, presenting a clean section without human intervention.

This design is increasingly used in mining workshops in South America, HVAC corridors in Middle Eastern airports, and industrial paint booths in Europe, where consistent airflow and reduced downtime are critical. By combining traditional G4 prefilters with automatic roll filter technology, operators gain a scalable and low-maintenance solution that supports both energy efficiency and equipment protection.

初效空气过滤的应用概述

在暖通空调和工业通风系统中，**初效空气过滤器（G1CG4）**是防护空气污染的第一道屏障，主要用于捕捉大于5微米的颗粒物，如灰尘、纤维和粗颗粒，以保护系统和下游高效过滤器。

类型与材料

常见的初效过滤器包括板式、折叠式和袋式。外框材料可选用纸框、铝框或镀锌铁框；滤料则可选用合成纤维无纺布、尼龙网、活性炭材料或金属孔网。为了提高结构稳定性，通常在两侧加装喷塑铁丝网或镀锌铁丝网作为防护。

典型应用场景

• 中央空调和通风系统中的预过滤。

• 大型空压机的进气预防尘保护。

• 洁净回风系统，降低空气循环中的粉尘负荷。

• 局部高效过滤装置的前置过滤，延长HEPA寿命。

• 在一些仅需一级过滤的通风场合，初效过滤器也可单独使用。

维护与保养

为了保持过滤效果，需要定期维护：

1. 更换周期： 根据环境不同，通常为1C6个月。

2. 性能检测： 每两个月可使用粒子计数器检测洁净度，如发现偏差，应检查是否存在泄漏或高效失效。

3. 更换方式： 更换时需停机操作，避免污染绕流。

HICLOVER 卷绕式自动过滤器的优势

传统初效过滤器需要人工更换，而在全球工业应用中，自动化逐渐成为趋势。HICLOVER卷绕式自动过滤器 将粗效滤料装入PLC控制的卷轴系统内，当压差升高时，滤料会自动推进，露出新的洁净过滤层，无需人工频繁操作。

这种技术在南美矿山车间、中东机场的空调进风走廊、以及欧洲工业喷漆车间应用广泛，能确保持续稳定的气流，并减少停机维护时间。通过将G4预过滤器与自动卷绕式过滤技术结合使用，用户可以获得低维护、可扩展的空气净化解决方案，同时兼顾节能与设备保护。