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Help Center304 SS Wedge Wire Filter Johnson Filter 0.25mm Slot 100mm Diameter Weld Mesh
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Welcome to Anping County Boli Hardware Wiremesh Products Factory – your trusted manufacturer of high-quality filtration solutions since 1998. Our 304 SS Wedge Wire Filter (Johnson Filter) with a precise 0.25mm slot opening and 100mm diameter is engineered for demanding solid-liquid separation applications. Crafted from premium 304 stainless steel and welded with advanced V-profile wire technology, this filter offers exceptional strength, reliability, and long service life. Whether you need water treatment, oil & gas filtration, or industrial process screening, our product delivers consistent performance backed by decades of manufacturing expertise.
The wedge wire design (also known as Johnson screen) features a continuous slot that minimizes clogging and maximizes flow rate. The 0.25mm slot size is ideal for fine particle retention, while the 100mm diameter provides robust structural integrity. Each filter is precision-welded to ensure uniform slot openings and smooth surface finish, reducing fouling and facilitating easy cleaning. Our factory in Hengshui, Hebei, China, utilizes state-of-the-art winding and welding equipment to produce filters that meet international standards.
Key Features & Technical Specifications
- Material: 304 Stainless Steel – excellent corrosion resistance and durability.
- Slot Size: 0.25 mm (0.010 inch) – precise filtration for fine particles.
- Diameter: 100 mm (4 inches) – suitable for high-flow applications.
- Wire Profile: V-shaped wedge wire – self-cleaning, non-clogging design.
- Welding Method: Continuous resistance welding – strong and leak-proof joints.
- Length: Customizable from 0.5m to 3m or longer (available upon request).
- End Connections: Threaded (NPT/BSP), flanged, or plain ends – compatible with standard piping systems.
- Application: Water treatment, oil & gas, chemical processing, food & beverage, mining, and more.
Detailed Product Parameters:
| Parameter | Value |
| Material Grade | 304 Stainless Steel (AISI 304) |
| Slot Opening | 0.25 mm ± 0.02 mm |
| Outer Diameter | 100 mm (4 inches) |
| Wire Width (Top) | 2.0 mm – 3.0 mm (customizable) |
| Support Rods | 304 SS, 6–12 rods per meter (depending on diameter) |
| Open Area | Approximately 30%–45% (customizable) |
| Maximum Working Temperature | Up to 400°C (750°F) in non-corrosive environments |
| Pressure Rating | Up to 10 bar (150 psi) standard; higher available upon request |
Advantages & Customer Benefits
- Superior Filtration Precision: The 0.25mm slot effectively captures particles down to 250 microns, ensuring clean output in water treatment and process filtration.
- Anti-Clogging Design: The V-shaped wedge wire creates a smooth inner surface that prevents particle buildup and reduces cleaning frequency.
- High Mechanical Strength: The welded construction supports high pressure and backwashing without deformation.
- Corrosion Resistance: 304 stainless steel resists rust and chemical attack, extending service life in harsh environments.
- Easy Maintenance: The slot structure allows for simple backwashing or chemical cleaning; filter can be reused many times.
- Customizable Length & Connections: We can produce filters in any length and with various end fittings to match your existing system.
- Cost-Effective: Long lifespan and low maintenance requirements reduce total cost of ownership.
Frequently Asked Questions (FAQ)
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Q: What is the difference between a wedge wire filter and a Johnson filter?
A: They are essentially the same product. "Johnson filter" is a common trade name for wedge wire screens used in well screens and industrial filters. Both refer to a continuous slot design made from V-profile wire wound around support rods. -
Q: Can the slot size be adjusted for different filtration needs?
A: Yes, we offer slot sizes from 0.05mm to 5mm or more. The 0.25mm slot is just one standard option. Please contact us with your specific requirements. -
Q: What length can you produce for 100mm diameter filters?
A: We can produce lengths from 0.5m up to 4m as standard, and longer lengths are possible with special handling. Custom lengths are welcome. -
Q: Is this filter suitable for high-temperature applications?
A: Our 304 stainless steel wedge wire filters can withstand temperatures up to 400°C (750°F) in non-corrosive conditions. For higher temperatures, we recommend 310S or 316L stainless steel. -
Q: What types of end connections are available?
A: We offer threaded ends (NPT, BSP), flanged ends (ANSI, DIN, JIS), and plain ends for welding or coupling. Custom connections can be made per your drawing. -
Q: How do I clean the filter when it becomes clogged?
A: The wedge wire design allows for easy backwashing with water or air. For stubborn deposits, chemical cleaning with mild acids or alkaline solutions is effective. The smooth surface minimizes binding. -
Q: Do you provide samples for testing?
A: Yes, we can provide sample filters (e.g., 300mm length) for evaluation. Please contact our sales team to discuss your testing requirements. -
Q: What is the typical lead time for mass production?
A: For standard specifications, lead time is 15–20 working days. For custom requirements, it may be 25–35 days depending on complexity. We can expedite for urgent orders.
Trust Anping Boli – Your Reliable Partner Since 1998
With over 25 years of experience in wire mesh manufacturing, Anping County Boli Hardware Wiremesh Products Factory has become a trusted supplier to clients across North America, South America, Europe, Southeast Asia, Africa, and the Middle East. Our annual export value of US$5 million to US$10 million reflects our commitment to quality and customer satisfaction. We ship from major ports including Tianjin, Qingdao, Shanghai, and Foshan, ensuring efficient logistics worldwide.
Every 304 SS wedge wire filter undergoes rigorous quality control – from raw material inspection to final dimension check and slot uniformity test. Our dedicated engineering team can assist with custom designs, tube sheets, and complete filter assemblies. We invite you to experience the durability and performance of our Johnson filters. Contact us today for a quote or to discuss your project needs. Let us provide you with a filtration solution that delivers consistent results and long-term value.
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