Johnson Slot Screen Tube

 The development of continuous-slot profile wire technology by Johnson in the early 1930s marked a pivotal moment in the evolution of well screen technology. This innovation transformed the industry, setting a new standard for filtration systems globally. With over a century of expertise since 1904, Johnson has consistently led the market with high-quality stainless steel water well screens, earning the trust of top drillers and demanding clients worldwide.

YUBO is one of the most professional Johnson screens manufacturers in China. YUBO has been at the forefront of delivering customized Johnson wedge wire slot screen tubes for nearly 15 years. We offer the v wire slot screen pipes for various applications, including surface water treatment, food and beverage processing, pulp and paper, oil and gas, mineral, and architecture industries.

Surface Water Treatment: Ensuring clean and safe water.

Food and Beverage Processing: Supporting precise filtration and safety compliance.

Pulp and Paper Manufacturing: Enabling effective debris removal and fiber management.

Oil and Gas Exploration: Providing robust solutions for sand control and durability.

Mineral Processing and Architecture: Offering versatile solutions tailored to unique needs.

Where Johnson Screens Excel?

Johnson screens find widespread applications in industrial filtration systems due to their robust design, anti-corrosion properties, and precise slot openings. Below are some of their key uses:

Malting Plants: Flat panel Johnson screens enhance the mixing process during the turning phase and improve ventilation during kilning.

Food Processing: Thanks to their heat resistance and corrosion-proof construction, Johnson screens are integral to various food processing applications.

Pulp and Paper Plants: They play a critical role in debris removal, fiber fractionation, dewatering, and water purification.

Sugar Mills: Johnson screens are indispensable in washing and dewatering processes, ensuring solid retention for optimal operation.

Customization to Meet Diverse Needs

At YUBO, we understand that every industry has unique filtration requirements. Our engineering team provides comprehensive customization services for wedge wire screen tubes. Whether you need specific tube diameters, slot spacing, or additional ports, we ensure your exact needs are met while adhering to strict industry standards.

The Wedge Wire Tube Flow Directions

Our wedge wire screen tubes are designed to accommodate various material flow directions and filament winding methods, making them versatile for different equipment setups:

FOTI (Flow Outside to Inside): Ideal for applications requiring external filtration.

FITO (Flow Inside to Outside): Suitable for processes where internal filtration is prioritized.

Case Study: Enhancing Oil Well Efficiency

In oil exploration, our wedge wire slotted screen pipes have delivered remarkable results by preventing 99% of sand intrusion. These screens have reduced heavy repairs by 80%, strengthened oil wells, and improved their overall integrity and stability. Featuring small, precise cuts ranging from 0.10 to 0.5 mm in the tube wall, our screens offer a simple yet highly effective solution for sand control. The laser-incision technology ensures smooth surfaces and unmatched precision, making these screens indispensable for modern oil exploration.

Why Choose YUBO for Your Johnson Screen Needs?

With a focus on quality, innovation, and customer satisfaction, YUBO is committed to providing reliable and efficient Johnson screens for diverse applications. Whether you need a standard solution or a fully customized product, our expertise and dedication ensure we can meet and exceed your expectations.

Contact us today to learn how YUBO can support your filtration needs and optimize your Filtration.

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Wedge Wire Screen Tube Flowing Direction

 

How do you describe the wedge wire screen tube's flow direction and construction types?

When describing wedge wire screen tubes, often mention FOTI, FITO, radial external wire, radial internal wire, and axial internal wire. Some customers feel confused, and we are pleased to make a simple and easy introduction to these parameters.

Flowing Direction-FOTI, FITO

FOTI means flowing direction from outside to inside.

FITO means flowing direction from inside to outside.

Radial External Wedge Wire

Radial external wedge wire means the wedge wire is radial outside the support wire, and the support profile wire is axial. These wedge wire tubes are composed of a surface wedge wire that is spirally wrapped around an axial support profile wire and attached to each other by resistance welding. 

When the flow direction is from outside to inside (FOTI), the flat side of the surface wedge wire is on the outside of the tube. 

When the flow direction is from inside to outside (FITO), the flat side of the surface wedge wire is on the inside of the tube. 

Radial external wedge wire FITO type is also called a reversed wedge wire screen tube.

Most applications require a standard common type. Precision openings and Economical production	External axial wire with internal circumferential support rods. Optimized collection and distribution replaces perforated inner tubes	Reversed radial internal wedge wire is another name for it. Back washing and Inverted external circumferential

Radial Internal Wedge Wire

Radial Internal wedge wire means the wedge wire is radial inside the support wire, and the support profile wire is axial. Radial Internal Wedge Wire Type Tube is rolled-formed from flat wedge wire screen panels, which means there are many welding joining points and the inside wedge wire is not continuously spirally wrapped around axial support profile wires. Furthermore, radial internals only have one flow direction, which is FITO (flow in to out). 

Smooth internal screen surface. Facilitates cleaning with an internal axial-movement scraper. Economical for small quantities and production of any size

Axial Internal Wedge Wire

Axial Internal wedge wire means the wedge wire is axially inside the support wire, and the support profile wire is on the outside of the filter element in a radial direction. The smooth surface of the wedge wire or profile wire is on the inside of the filter element, so the filtration direction is from inside to outside. This means that axial internal wedge wire has only one flow direction, FITO (flow in to out), though FOTI (flow out to in) is also possible in exceptional cases. 

For axial internal wedge wire, according to different slot sizes and filter sizes, there are two different types: one type is wedge wire type tube or cylinder that is rolled from flat wedge wire screen panels, which means there are many welding joining points. The other type is the outside support wires, which are continuously spirally wrapped around axial wedge screen wires.

Smooth internal screen surface. Facilitates cleaning with an internal axial-movement scraper. The flow moves across the wire edges for effective dewatering. Economical utility	smooth internal screen surface Without a welding seam, more stronger strength Facilitates cleaning with an internal axial-movement scraper The flow moves across the wire edges for effective dewatering

Axial External Wedge Wire

Axial External wedge wire means the wedge wire is axially outside the support wire, and the support profile wire is on the inside of the filter element in a radial direction. The smooth surface of the wedge wire or profile wire is on the outside of the screen filter element, so the filtration direction is usually from outside to inside. But sometimes, the customers require Axial External Wedge Wire and FITO, which means the smooth surface of the screen wedge wire is inside. FOTI is used when there are no special requirements, such as for an axial external wedge wire. Axial External Wedge The wire tube or cylinder is rolled from flat wedge wire screen panels, which means there are many welding points on the inner supporting profile wires.

Channel rod construction; Economical and easy production;  Smooth surface outside	Channel rod construction; Smooth surface Inside; Not commonly used

Get In Touch With Us If You Require Any Additional Information About Our wedge wire tubes.

Email:sales@ubofilter.com

Application:

The stainless steel wedge wire slot screen tube produced by our plant is widely used in various filtering, screening, dehydration, sewage treatment and other equipment its reasonable structure, high filtering precision and high working efficiency are considered as one of the best filtering elements.

Water Treatment

It is used as filters and separators to remove suspended solids and particulate matter from water, and is widely used in drinking water treatment, wastewater treatment, and industrial water treatment.

It acts as a filtration medium in desalination, descaling, and softening systems to improve treatment efficiency.

Chemical

It can be used as filtration components in equipment such as reactors, distillation towers, and centrifuges to separate liquids and solids.

It is used for sterile filtration in fields such as pharmaceuticals and food processing to ensure product purity.

Mining

It is used for solid-liquid separation and filtration to extract concentrates from slurry, and is widely used in mining beneficiation and coal washing.

It can be used for extracting and filtering slurry from tailings ponds.

Oil & Gas

It is used as filters in drilling, oil extraction, and pipeline transportation to separate oil, water, and impurities.

It acts as precision filtration in oil and gas processing units to ensure product quality.

Power

It functions as filters for equipment such as turbine generators and boilers to remove suspended solids and impurities from water.

It is applied in the cooling water systems of nuclear power plants to ensure safe and reliable operation.

YUBO is the wedge wire screen slot tubes manufacturer & exporter in China,please contact us if you have any questions.

Improving Coal Washing Efficiency--Screen Media

 Coal processing or coal beneficiation uses physical (mechanical) and/or chemical methods to remove rocks, dirt, ash, sulfur and other contaminants and unwanted materials to produce high-quality coal for energy in local and export markets.

YUANLV manufactures a complete range of equipment for coal processing plants, from the Run of Mine (R.O.M) stockpile to the tailings dam, including:

** Screening equipment

** Gravity separation equipment

** Beneficiation Equipment

** Dewatering equipment

When developing coal processing solutions, we consider ore characteristics, process requirements and environmental constraints to achieve your desired coal quality in terms of calorific value and the level of inherent mud and ash.

YUANLV helps you customize and optimize your coal beneficiation process to achieve the required product specification!

We help enhance the efficiency of treatment and enrichment processes

We install coal screens and screening equipment.

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We offer all-inclusive services to coal yards for coal and coke screening. We provide professional advice, implementation support, design documentation, aftercare and replacement parts,especially the screen stainer equipment.

Want to improve the efficiency of processes and end product quality?

We advise on the selection of industrial screen types and parameters.

With the right screen type selection and parameters selection, we help optimise the efficiency and costs of screening, classification, dewatering and enrichment processes. We manufacture a wide variety of bespoke industrial screens, including slotted screens, Centrifuge screens and polyurethane screens. With the available installation systems, special hardware and dedicated accessories, you will install our screens on all types and models of vibrating screens and Centrifuge basket.

We support technological processes:

Initial classification

End classification

Washing Coal process

Wet screening

Dry screening

Recycling

Dewatering

Enrichment

Desilting

Our Coal Screening Solutions and products:

1. Polyurethane Screens

We offer polyurethane screens are made with self-relieving apertures resulting in the unrestricted downward movement of any sized particle – eliminating pegging and blinding from your coal screening.

2. Sievebend Housings

We manufacture three varied dimensions of static and reversible sievebend housing units for coal screening. Both units are suited to polyurethane and wedge wire sievebends.

3. Static Screens

Static screens for coal screening are designed to reduce the initial load of material ahead of vibrating screens. The wetted surfaces can be polyurethane, rubber or ceramic.

4. Screen Centrifuge

Vibrating screen centrifuges for coal screening achieve long-lasting performance in the toughest coal dewatering applications. This is achieved with a polyurethane door and inspection cover, a steel feed pipe protected by ceramic wear linings and a durable segmented wedge wire screen fitted in a robust design cage.

5. Drum screen 

drum screen has many advantages such as wide adaptability of coal type, simple coal feeding mode, high screening efficiency, large screen component, low energy consumption, low noise, strong sealing performance, long service life, small maintenance, and convenient maintenance.It overcomes the problem of screen clogging in the screening of wet materials by circular vibrating screens and linear screens and improves the screening system.

6. Slotted baskets for dewatering centrifuges

We manufacture centrifuge baskets based on our v wire slotted screens. Proven designs, sturdy reinforcements, precise manufacture and compliance with required tolerances make them ideal for most models of centrifuges.

Our coal screening equipment, rated among the highest quality, is used in coal preparation plants (MCPP) and modular coal preparation plants (MCPP) and are ideal for coal cleaning and sampling for a range of applications.

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Wire Mesh Filter Discs

 A filter disc is an essential tool designed to filter fluids, particularly water, making it a crucial component in irrigation systems and various industrial applications. This stainless steel wire mesh filter disc ensures clean water by effectively removing particles based on size and quantity, making it ideal for a wide range of uses.

What is a Filter Disc?

A filter disc, also known as a disc filter, is a water filtration device primarily used in irrigation systems. Its design and function resemble a screen filter but with enhanced efficiency. The geometry of the channels within the filter, including size, length, angle, and the number of intersection points determines the filtration quality. These parameters define the disc's ability to trap and retain particles, ensuring higher filtration quality and cleaner water.

The core component of a filter disc is its cartridge, composed of multiple stacked discs. These discs create intricate pathways that block contaminants while allowing water to flow freely.

Types of Filter Discs

Various types of filter discs are available in the market, each designed to meet specific filtration needs. Below are the main types:

1. Mesh Filter Discs

Mesh filter discs come in flat and pleated versions, providing flexibility based on application requirements. These discs are cost-effective and are widely used to clean and protect gas or liquid flow systems. They offer an increased filtration area, making them ideal for systems requiring enhanced efficiency at a low cost.

2. Fiber Filter Discs

Fiber filter discs are versatile and suitable for both gas and liquid filtration. These discs are highly efficient in capturing fine particles, ensuring optimal cleanliness in various applications.

3. Powder Filter Discs

Manufactured using powder metallurgy, powder filter discs feature diverse porosity levels. These discs are available in various sizes and are commonly used in applications that demand precise filtration, such as separating fine particles from fluids or gases.

Applications of Filter Discs

Filter discs are widely used across industries for their ability to filter various substances efficiently. Here are some key applications:

1. Irrigation Systems

Filter discs are crucial in agricultural irrigation systems, ensuring clean water by removing contaminants such as organic matter, fine sand, and other particles.

2. Air Filtration

The wire mesh filter discs play a vital role in air filtration, removing impurities and contaminants. They are commonly found in air regulators, conditioners, and devices filtering corrosive gases.

3. Solid Filtration

Industries such as coal, glass, and food processing use filter discs to separate impurities from solids, ensuring the quality of the final product.

4. Oil Filtration

Filter discs are widely used in cleaning and refining various oils, including petroleum, edible oils, and hydraulic oils. They ensure the removal of contaminants, improving the quality and efficiency of the oil.

5. Separation and Sieving

Wire mesh filter discs are indispensable in processes like separation, sorting, and sieving in numerous industries. Their consistent performance and reliability make them a preferred choice for many applications.

Benefits of Using Filter Discs

Fast and Effective Backflushing: Filter discs allow for quicker and more efficient cleaning compared to traditional filter media.

Cost-Effective: The low manufacturing cost, especially of wire mesh discs, makes them an economical choice for various filtration needs.

Durable and Reliable: Built with high-quality materials, filter discs provide consistent performance over time.

Versatile: Suitable for a wide range of applications, from irrigation to industrial processes.

Choose the Right Filter Disc for Your Needs

Whether you're looking to filter water for irrigation, air for ventilation systems, or oil for industrial purposes, filter discs offer a reliable and cost-effective solution. With multiple designs and configurations available, selecting the right filter disc ensures optimal performance and efficiency for your specific application.

For consistent, reliable filtration, our stainless steel wire mesh filter discs provide excellent results. Designed for durability and affordability, they are the ideal choice for low-cost filtration solutions without compromising quality.

Need help? Get in touch with the filter disc Factory

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Reactor Internals for Radial Flow Reactor & Down Flow Reactor

 

Reactor Internals

Reactor Internals for Radial Flow Reactor & Down Flow Reactor

We design internal internals for gas/liquid / solid hybrid reactors (wedge wire screen type) in petrochemical applications.

Reactors used in the chemical, petrochemical, and refining industries have different flow directions. This flow may be radial (Radial Flow) or vertical downwards (Down Flow). YUANLV has gained extensive experience in constructing Radial Flow and Down Flow reactor internals.

The technical level of the hydrogenation process mainly depends on the performance of the catalyst, the performance of the catalyst depends on the advancement and rationality of the reactor Internals.

Unlike wedge wire screen filter products used in other industries, Johnson Screen Reactor Internals has strict requirements on raw materials, production processes, and error control.

Through years of R&D and upgrades, our reactor's internal components can fully realize the full potential of the reactor.

Radial flow reactor internals	Down flow reactor internals
1) Center pipe 2) Scallops 3) Outer baskets	1) Catalyst support grids 2) Para-Xylene (PX) Grids 3) Outlet collectors 4) Header and laterals 5) Nozzles 6) Candle Filter Elements

Center Pipes

The center pipe is a central slotted screen in radial flow reactors. Its outer surface contacts the catalyst layer and is made as a slit screen of triangular wire. This device holds the packing and directs the flow toward the outlet. There are versions for flow going towards the center or outwards the center. The central pipe is installed in the reactor on support elements above the outlet fitting. The flow area of the outer surface of the pipe is calculated to ensure operation within the wide range of flow rates.

Our factory advantage:

1. Large screen area, minimal hydraulic resistance

2. The usage of a slit screen stops catalyst leakage and excludes clogging of slots due to the usage of triangular wire

3. Strict control of verticality and straightness tolerances

Scallops

Scallops form an outer slit screen in radial flow reactors. These devices are located along the inner vessel surface. Scallops are installed inside vertical reactors and distribute or collect the flow. Scallops hold the packing, collect, and direct the flow. The outer surface of the scallop contacts the catalyst. Depending on the project’s requirements, it can be made of V wedge wire or perforated metal. It can be used to move the flow towards the center or outwards the center. Expanding rings are used to mount the scallops in the radial direction during installation. The space between the scallops and the central pipe in the upper part is closed with a blind plate. The flow area of the scallops is calculated to ensure stable operation in a wide range of flow rates.

Our advantages:

1. Large screen area, minimal hydraulic resistance

2. The usage of a slit screen stops catalyst leakage and excludes 

3. clogging of slots due to the usage of triangular wire

4. Strict control of verticality, straightness and torsion tolerances

Support grids

Support grids are devices for catalyst retention in the horizontal plane of the reactor vessel.

The support grid has a prefabricated structure consisting of segments and support beams. The segments are based on triangular v wire slit screens. They are installed on a support ring and connected by various fasteners. Cord or ceramic fiber gaskets are used to seal the gaps and ensure tightness. The design features of the grid are determined according to the given loads from the catalyst layer and the pressure drop.

Our advantages:

1. Large screen area, minimal hydraulic resistance

2 .Rigid design withstands catalyst weight and pressure drop

3. The usage of a slit screen stops catalyst leakage and excludes clogging of slots due to the usage of triangular wire

4. Assembly control on a flat surface for checking gaps, flatness tolerances and dimensional deviations

Header and laterals

A collector/distributor uses a header pipe or a hub to which several screen tubes are attached in order to enable excellent collection or distribution of a gas or a liquid within a medium without wall effects or channeling in order to maximize efficiency.

Outer basket

The outer basket is an outer slit screen in radial flow reactors. It is located along the inner vessel surface. They are usually installed inside vertical reactors and distribute or collect the flow. The outer surface of the basket contacts the catalyst and is usually made of triangular wire. It can be used to move the flow towards the center or outwards the center. Outer baskets consist of segments assembled by fasteners. The space between the baskets and the central pipe in the upper part is closed with a blind plate. The flow area of the baskets is calculated to ensure stable operation in a wide range of flow rates.

Our Reactor Internals Advantage

1. Adopt advanced wedge wire screen ring welding technology to make the structure stronger.

2. Special surface treatment technology can increase the service life of products by 30%.

3. Increase the loading of the active catalyst.

4. Simple installation and space-saving.

Application Industries:

Refining – Catalytic reforming, hydrocracking, hydrotreating, molecular sieve, MTBE, sulfur removal, catalyst regeneration, HDS, alkylation, isomerization, hydrogen.

Petrochemical – Ammonia conversion, paraxylene, propane, PTA, styrene monomer dehydrogenation, gas dehydration, methanol, LAB, cumene, PSA, mercury removal, benzene absorption.

Natural Gas – Molecular sieves, activated and promoted alumina, activated carbon, silica gel, amine, glycol, sulfur plant, mercury removal, IGCC, coal gasification.

YUANLV designs and manufactures a variety of radial flow reactor internals including center pipes,scallops, outer baskets, nozzles and ventilation pipes,etc.

Our products have been used in Continuous Catalytic Reforming (CCR), Styrene Monomer (SM), Ammonia Conversion, Propane Dehydrogenation (PDH) and many others.

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The genuine feedback from our customers after using our products.

1.

"Our collaboration with their team has been a game-changer for our sulphur removal operations. The center pipe and scallops technical expertise and innovative solutions provided have significantly improved our efficiency and product quality. We truly value this partnership and look forward to continued success together."

— Michael Anderson, Operations Manager, Texas Refining Co.

2. 

"The center pipe technical support we received from your team have exceeded our expectations. You are a trusted partner in our journey towards sustainability."

— Katrin Müller, Head of Process Optimization, Berlin Refining AG

3. 

"Working with your company has been an outstanding experience. Your team's proactive approach and cutting-edge technologies have helped us achieve remarkable operational efficiency. This collaboration is a testament to scallops in the Catalytic reforming projects."

— Ahmed Al-Rashid, Senior Engineer, Gulf Petrochemicals Ltd.