Melt Blown Compared With String Wound Depth Cartridges

Melt blown cartridges use a three dimensional fiber network with graded density, while string wound cartridges use continuous yarn wound in layers to form a graded structure. The melt blown matrix is formed by spinning fibers directly into a web, creating a uniform and stable structure. String wound cartridges rely on the winding pattern to create depth, with the outer layers finer than the inner ones.

• Melt blown media has a consistent fiber matrix throughout the life of the cartridge
• String wound media relies on the winding pattern to maintain graded density
• Melt blown construction resists changes in fiber structure under pressure
• String wound cartridges may experience fiber release if the winding is disrupted

Related product: PP Melt Blown Depth Filter Cartridges

Melt blown cartridges are designed to prevent media migration and contaminant unloading, even under high differential pressure. The bonded fiber network holds particles in place. String wound cartridges can release fibers if the winding is compromised, especially during backwashing or high-pressure operation.

• Melt blown cartridges maintain integrity under forward and reverse flow
• String wound cartridges may release fibers if the core or winding fails
• Contaminant unloading is more likely in string wound elements under stress
• Melt blown media resists shedding even at elevated differential pressure

Related product: PP Melt Blown Sediment Filter Cartridges

Melt blown cartridges offer high dirt holding capacity due to their three dimensional structure and uniform fiber distribution. String wound cartridges also provide good capacity, but the capacity depends on the winding density and core strength. Both types can be backwashed, but melt blown elements are more resistant to structural degradation during cleaning.

• Melt blown cartridges have high dirt holding capacity from uniform media distribution
• String wound cartridges depend on winding density for capacity
• Melt blown elements maintain performance over multiple backwashes
• String wound cartridges may degrade faster if backwashed frequently

Related product: String Wound Depth Filter Cartridges

Melt blown cartridges are ideal for applications requiring consistent performance and resistance to pressure changes, such as in power plant condensate, chemical processing, and water treatment. String wound cartridges are suited for high flow, high dirt load duties like steel plant cooling water, desalination, and power station condensate, especially when backwashing is used.

• Melt blown cartridges are preferred for sensitive downstream stages
• String wound cartridges are used in high flow, high load environments
• Backwashing is more effective with string wound cartridges
• Melt blown elements are better for applications where media integrity is critical

Related product: HFPP Series String Wound High Flow Filter Cartridges