Find HS Code and trade information for filter screen

Filter Screen

A filter screen is a porous barrier used to separate solids from fluids (liquids or gases). They are employed in a wide variety of applications to remove contaminants, protect equipment, or recover valuable materials.

Material

Filter screens are constructed from a diverse range of materials, selected based on the fluid being filtered, the size of particles to be removed, temperature, pressure, and chemical compatibility. Common materials include:

• Metals: Stainless steel (various grades, including 304, 316 for corrosion resistance), aluminum, titanium, copper. Often used for high-temperature, high-pressure, or chemically aggressive environments.
• Polymers: Polypropylene, nylon, polyester, PTFE (Teflon). Suitable for lower-temperature applications and offer good chemical resistance.
• Wire Mesh: Woven or welded wire mesh, often stainless steel, providing strength and precise pore size control.
• Non-Woven Fabrics: Typically polypropylene or polyester, used for coarser filtration and pre-filtration.
• Ceramics: Alumina, zirconia, silicon carbide. Used in high-temperature, chemically resistant, and high-pressure applications.

Purpose

The primary purpose of a filter screen is separation. This can be for:

• Contaminant Removal: Removing debris, sediment, rust, scale, and other unwanted particles to protect downstream equipment (pumps, nozzles, sensitive instruments) or improve fluid quality.
• Fluid Clarification: Improving the visual appearance of a fluid by removing suspended solids.
• Product Recovery: Capturing valuable solids from a fluid stream (e.g., catalyst recovery in chemical processes).
• Air Purification: Removing dust, pollen, and other airborne particles.

Function

Filter screens function by creating a physical barrier that allows the fluid to pass through while retaining solid particles larger than the screen's pore size. The effectiveness of a filter screen is determined by:

• Pore Size: Measured in microns (µm), defines the size of particles that can pass through.
• Permeability: A measure of how easily fluid flows through the screen.
• Surface Area: Larger surface area generally allows for higher flow rates and longer filter life.
• Filter Media Shape: Can be flat sheets, cylindrical elements, conical elements, or other configurations.

Usage Scenarios

Filter screens are ubiquitous across numerous industries:

• Water Treatment: Removing sediment, bacteria, and other contaminants from drinking water and wastewater.
• HVAC Systems: Protecting air conditioning and heating equipment from dust and debris.
• Chemical Processing: Separating catalysts, removing unwanted byproducts, and purifying chemicals.
• Food and Beverage Industry: Clarifying juices, filtering sauces, and removing solids from liquids.
• Pharmaceutical Industry: Sterilizing fluids and removing particulate matter.
• Automotive Industry: Fuel filters, oil filters, cabin air filters.
• Aerospace Industry: Hydraulic fluid filters, air filters for aircraft engines.
• Industrial Manufacturing: Protecting pumps, compressors, and other equipment from damage.

Common Types

• Basket Strainers: Cylindrical screens placed inside a housing, often used for coarse filtration. Easy to clean and maintain.
• Y-Strainers: Shaped like the letter "Y," with a screen inside the housing. Suitable for low to medium flow rates.
• Inline Strainers: Installed directly in a pipeline, offering convenient filtration.
• Self-Cleaning Strainers: Equipped with mechanisms to automatically remove accumulated debris, reducing maintenance requirements.
• Edge Filters/Disc Filters: Use stacked discs with woven mesh to create a large filtration area.
• Pleated Filters: Utilize a pleated design to maximize surface area and increase filter life.
• Sintered Metal Filters: Constructed from metal powders bonded together, offering high porosity and strength.
• Wire Mesh Filters: Woven or welded wire mesh screens, available in various weaves and materials.
• Non-Woven Filters: Typically used as pre-filters to remove larger particles before finer filtration.

Based on the provided information, “filter screen” can be classified under the following HS codes:

• 8421990140: Parts of machinery and apparatus for filtering or purifying water. This code covers parts specifically designed for water filtration machinery.
• 8421990180: Other Parts of machinery and apparatus for filtering or purifying water. This code is for other parts used in water filtration equipment, not specifically detailed elsewhere.
• 7019905140: Other Glass fiber filters. This code applies to glass fiber filters, which may be used as filter screens.
• 7020006000: Other articles of glass. This code covers other glass articles, which could include glass filter screens.
• 16. 7019905140: Other Glass fiber filters. This code applies to glass fiber filters, which may be used as filter screens.

Regarding HS code 8421990140 and 8421990180, these codes specifically relate to parts for filtering or purifying water machinery and apparatus.

Regarding HS code 7019905140, please note that this code is specifically for glass fiber filters.

Regarding HS code 7020006000, this code covers other glass articles, and it is important to verify the specific material composition of the filter screen.