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XF Wound Filter Element

The XF Wound Filter Element is primarily used in powder resin filters and pre-filters for condensate polishing in power plants. Due to the large surface area of polypropylene fibers, it possesses not only mechanical filtration capabilities but also a certain degree of adsorption capacity. Polypropylene filaments are multi-layered and wound to form a labyrinth-like filtration layer. This design fully utilizes the fiber filtration layer, allowing impurities to penetrate deep into the filter bed for effective depth filtration. Typically, a layer of powdered resin is applied to the exterior of the filter element to enhance backwashing efficiency and extend the service life of the filter element.


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XF Wound Filter Element

The XF Wound Filter Element is designed for condensate polishing systems in power plants and is primarily used in powdered resin filters and pre-filters. Due to the large surface area of polypropylene fibers, the element provides not only mechanical filtration but also a certain level of adsorption capability. The multi-layer winding of polypropylene yarn forms a maze-like filtration structure, allowing contaminants to penetrate deep into the media for true depth filtration.

In typical applications, a layer of powdered resin is pre-coated onto the outer surface of the filter element. This enhances backwash efficiency, improves filtration performance, and significantly extends the service life of the element.

Product Features

  • Adsorptive Capability
    Polypropylene fiber provides natural adsorption properties for certain impurities in water.

  • Low Flow Resistance
    Minimizes pressure drop during system operation.

  • Backwashable & Low Replacement Frequency
    The structure allows effective backwashing, reducing overall maintenance costs.

  • Robust Mechanical Structure
    Built with a stainless-steel high-strength core to ensure stability during high-pressure operation.

  • High-Performance Fibers
    Special-grade fibers ensure no deformation or fiber shedding during operation.

  • Compatible with Resin Pre-coating
    Allows powdered resin pre-coating, improving backwash results and extending filter life.

Materials of Construction

Component Material
Filter Media High-performance polypropylene fiber, degreased cotton yarn, glass fiber
Core / End Connections 304, 316L, 304L stainless steel
Outer Diameter 50 mm, 60 mm
Length Options 50″–70″

Operating Characteristics

Item Specification
Operating Differential Pressure (80 °C) 0.003–0.028 MPa
Initial Differential Pressure 0.1 MPa (pre-filter)
Failure Differential Pressure 0.18 MPa (resin filter)
Initial Differential Pressure After Backwash 0.014 MPa

Recommended Flow Rates

Filter Length Minimum Flow Rate Maximum Flow Rate
50″ 0.75 m³/h 1.99 m³/h
60″ 0.91 m³/h 2.38 m³/h
70″ 1.10 m³/h 2.76 m³/h

Typical Applications

  • Condensate Powdered Resin Pre-coat Filters
    Used with resin pre-coating for high-efficiency contaminant removal.

  • Condensate Polishing Pre-filters for Iron Removal
    Effectively removes iron oxides and suspended solids before fine condensate treatment.

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