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Introduction to Wedge Wire Screen Structure

Filtration performance begins with design.
Before choosing the appropriate Wedge Wire screen type, prepare for several basic requirements:

Filtration Objective: What is your primary filtration goal? Is it for impurity separation, downstream equipment protection, or dewatering?
Filtrate Characteristics: What are the characteristics of the material to be filtered? Is the specific gravity lighter, heavier, or indistinguishable from water? Is it viscous?
Equipment Operating Pressure: What is the operating pressure (kgf/cm²)? This will influence the structural strength selection.
Cleaning and Discharge Method: What is your preferred method for cleaning and residue discharge? For example: with scraper blade, screw, or backwash etc.

The liquid flow direction determines the particle retention location, which directly affects the screen's self-cleaning capability and structure. The configuration of the screen, such as the inner and outer positioning of the V-wire and the support rods, influences both the filtration performance and structural strength.

Wedge Wire Screens are classified into the following types based on application requirements and liquid flow direction:

Flow direction		Desciption	Produciton capability
Flow direction		Desciption	Size (mm)	Minimium slot width(mm)
Internal to External Flow	FITO - Radial Internal	The wire is on the inside, and the support rod is on the outside; Rod direction is Axial (along the screen height).	OD>120	0.04
	FITO - Axial Internal	The wire is on the inside, and the support rod is on the outside; Wire direction is Axial (along the screen height).	OD>120	0.04
	FITO - Radial External - Reverse	The wire is on the outside, and the support rod is on the inside; The structure is similar to the Flow-In Basic Type, but the filtration direction is reversed.	32<OD<2000	0.04
	FITO - Continious Support	Similar structure to the Basic Reverse Roll, but is an integral/seamless structure, providing better true roundness, slot uniformity, and strength.	32<OD<2000	0.10
External to Internal Flow	FOTI - Radial External – Standard	The wire is on the outside, and the support rod is on the inside; Rod direction is Axial (along the screen height).	32<OD<2000	0.02
External to Internal Flow	FOTI - Axial External	The wire is on the outside, and the support rod is on the inside; Wire direction is Axial (along the screen height).	OD>120	0.04

Introduction to Wedge Wire Screen Structure