Supply of custom grade G4 (pre-clean) pocket filters with metal mesh for a large data center project. 

I. Project Background: Operation and Maintenance Challenges for an Outdoor Air System in a Data Center
The data center involved in this project houses a large amount of precision electronic equipment such as servers and switches. Because outdoor air ducts are constantly exposed to the outdoor environment, particulates and debris—including willow fluff, broken branches, plastic fragments, and small particulates—can easily enter air conditioning units along with the air flow. The customer's original system did not have safety netsPocket filter class G4There are two main unresolved problems:
1. Solid debris directly impacts the filter bag, often causing ruptures and damage to the filter media and loss of protective filtration properties. Once infiltrated, the dust adheres to the server motherboard, creating the risk of short circuits and equipment downtime;
2. Large-volume foreign objects quickly block the surface of the filter bag, and the filter pressure rises quickly, so the replacement cycle is greatly shortened, requiring several shutdowns and replacements every month, which seriously affects the 24-hour uninterrupted operation requirements of the computer room.

Having compared various filtration systems on site, the customer requested a non-standard solution: in addition to standardPocket filter class G4 On the air intake side there is a built-in protective metal mesh with a diamond pattern; This design allows you to maintain the original installation dimensions of the device, while simultaneously increasing the dust holding capacity of the filter material and extending the replacement interval for consumables. Our specialists conducted an on-site inspection, assessing the internal dimensions of the server room air handling unit, the volume of supplied outside air, as well as the nature of the dust and contaminants present outside, and ultimately proposed a solution using a metal mesh structurePocket filter class G4Development of complex non-standard solutions and mass production.

II. Key Benefits of Custom G4 Class (Pre-Clean) Pocket Filters with Metal Mesh

The custom-made model came out on top this timePocket filter class G4

The design of the standard pocket filter has been supplemented with frontal metal protection, adapted to the harsh operating conditions in data centers:
1. Metal front mesh with diamond mesh to prevent the entry of particulates and protect the integrity of the filter pockets
The air inlet side is equipped with a one-piece stamped galvanized steel mesh with a diamond-shaped mesh. This durable, impact-resistant mesh effectively traps solid particles (e.g. lint, sand, gravel, plastic fragments) while preventing punctures or abrasion of the polyester filter pockets. This eliminates filter damage and dust leakage directly at the point of origin, significantly reducing the risks to equipment associated with filter failure. The metal mesh is attached to the aluminum alloy frame with clips, allowing it to be removed and cleaned for reuse.
2. G4 filtration standard to effectively capture fine dust and fibers
The interior of the filter consists of 3D polyester fiber pockets with a gradient density that meets the G4 pre-filter standard. The filter effectively captures suspended particles such as lint, flying dust and hair. Acting as the first stage of protection for the data center ventilation system, it reduces the load on subsequent F7 class filters (medium and high efficiency), thereby extending the service life of the entire filtration system. The edges of the filter pockets are connected by ultrasonic welding, which prevents unraveling of the threads or destruction of the adhesive seam, and also ensures that the shape is retained even at high air flow pressure.
3. Production according to individual sizes; no need to modify the air conditioning system housing
The aluminum alloy frame is made according to precise measurements of the internal space of the installation, so that the length, width and thickness of the filter perfectly match the available seats. The filter is ready for installation immediately after delivery and does not require trimming or changing the design of the ventilation duct, which saves installation time and costs, and also minimizes data center downtime.
4. High dust holding capacity and low aerodynamic drag to reduce energy consumption and maintenance frequency
The multi-pocket design using volumetric filter material provides dust holding capacity significantly higher than standard panel pre-filters, allowing you to more than double the interval between replacements with the same dust content in the air. Optimized air passages provide low initial aerodynamic drag and reduce the load on air conditioning fans; this helps the data center optimize PUE (Power Usage Efficiency) and achieve long-term energy cost savings.