Product Announcement from Croft Filters Ltd.


Wedge Wire for high-pressure applications.-Image

Wedge Wire

Croft Filters supply wedge wire, a profiled wire used to construct a screen which is both robust and extremely accurate. Usually manufactured from stainless steel, it comes in various forms: flat panels, curved panels, segments or sections, to form floors, discs and drums, and also in a cylindrical form known as a ‘slot tube’. Performing extremely well in applications requiring accuracy as well as strength, wedge wire is suitable for maintenance-free situations and high-pressure applications. Apertures range from 0.1mm to 20mm, complemented by wire profiles and support wires.

With a design that helps the screen clear easily and is less likely to peg or blind, wedge wire is a unique material.

 

About Us

Over 20 years of manufacturing expertise

Croft Filters is a leading manufacturer of customer specified filters. These filters can be made in any shape or size and popular styles include cones, cylinders, baskets and screens. Filters can be manufactured in wire mesh, perforated plate and expanded metal with production varying from "one offs" to repeat orders for large international customers.

The company has been trading for over 20 years supplying critical components to industry sectors across Europe and beyond including Chemical, Oil, Gas, Pharmaceutical, Power Generation, Food and Beverage Manufactures, Adhesives, Sealants, Waste Management, Aerospace and Hydraulics.

We believe our competitive advantages are:

  • ·     Filter Production
  • ·     Agile Manufacturing
  • ·     Swift Turnaround on Customised Services
  • ·     Commitment to understand customer needs

We also supply perforated plate which can be custom punched to precise specifications.

In house capabilities

Croft Filters manufactures and fabricates all its products in-house using techniques including micro plasma, seam, arc, gas, MIG, TIG, spot welding and CNC punching.

Using our well-equipped machine shop, punching, rolling and forming of products can be done quickly to specific requirements. Our team of specialist engineers are happy to meet your individual filtration requirements. Croft Filters specialise in providing solutions for precise tolerances and specifications with our attention to detail and product quality providing a competitive advantage.

Croft Filters can work with a wide range of materials including Stainless Steel, Mild Steel, Brass, Metal Alloys and Synthetic Materials.

Filters:

Croft Filters are experts in customised filtration manufacturing. Filtration is a vital part of many manufacturing processes - and in today’s modern manufacturing plants, we see more and more demand for customised filtration to meet the specific needs of each organisation.

These days, a wide range of industries require custom filtration, including the water treatment, power generation, pharmaceutical, oil and gas, food, automobile and nuclear industries.

Filtration requirements vary greatly from one industry to the next. To maintain the integrity of the products manufactured, they must be clearly designed and specified to meet the needs of each application.

The high-pressure conditions in the nuclear industry, for instance, require filters made of super alloys - while the water treatment sector generally deals with much lower pressures and often utilises unsupported mesh filters.

To serve such a variety of industries, a customised manufacturing capability is clearly essential: manufactured to specific customer requirements, each of our filters is carefully designed to address a specific filtration challenge.

Croft Filters' baskets, strainers and cylinders make up one of the most widely used range of filters used to separate solids from liquids.

With a well-established design, each filter comprises an assembly of a perforated metal cylinder or cone that supports one or more layers of very fine wire mesh.

To increase their structural strength, the filters can also be manufactured with two perforated cylinders with one or more layers of fine wire mesh sandwiched between them, reducing the open area and so enabling the filtration of very fine impurities.

The filters are inserted in a hollow body (known as a filter housing) in the path of the fluid flow, parallel to the flow, forcing the fluid to pass through the filter media. The size of the wire mesh required depends upon both the type of fluid to be filtered and the size of the impurities.

These types of filters can provide a very high degree of separation with little change in the pressure drop across them. They must be cleaned or backwashed to prevent substance build-up – something which would gradually affect the filters' performance.

Please inform us if the filters you require will need to be backwashed or to withstand flow in both directions.

Croft Filters supply cone filters, commonly used in a number of industry sectors. These filters can be manufactured in almost any size and specification, using a wide variety of materials. Usually placed inline in a fluid stream, they are generally used for high-velocity fluid flow applications.

Their design includes a perforated cone supporting one or more fine wire meshes, as per the filtration requirement. Witches' hat strainers are the most common type of conical filters used in industry, due to their well-established design and effective filtration qualities.

They do, however, have a higher-pressure differential across them than other kinds of filters. The load is also distributed unequally, since the flow is directed to the central portion of the filter.

Nonetheless, the low open areas make these filters very popular for all kinds of industrial applications - as does the simplicity of design.

Witches' hat filters can be composed of layers of wire cloth to create a filter material with higher strength and rigidity. The multilayer meshes form an ideal uniform filtration structure. The material and structure maximise the flow area, effectively reducing resistance and ensuring reliable operation.

Qitches' hat strainers can be used for softening, desalination, water filtration and water pre-treatment systems, as well as less-demanding industrial water supply and oil fine filtration equipment. They are primarily used to provide a filtering layer that removes solids suspended in water, oil and adhesive resin.

As a specialist producer of witches' hat strainers, Croft Filters can manufacture them for a wide variety of applications. In stainless Steel 316, we can make them with a pore size of as little as 1 micron, using a single mesh or a number of meshes to achieve the required micron rating.

Croft Filters supply screen filters or flat plate filters for relatively low-viscosity fluids. Exposing the flow to a higher effective filter area results in superior filtration – and for critical applications, an array of screen filters can be inserted at certain points in the flow for even better results.

These filters can be manufactured using perforated plate supporting a fine woven wire mesh. The material and the specification of the mesh depend on the type of fluid as well as the type of impurity to be filtered.

These types of filters are generally used as an in-line process. They are found in a wide variety of applications – to give just one example, they are used in the pharmaceutical industry to separate microbial organisms from laboratory chemicals.

Croft Filters are one of very few Dixon Ring suppliers.

Invented by Olaf George Dixon in 1946, Dixon Rings are made of stainless steel mesh material. They come in various sizes: some as small as 1/16".

Historically, the sheer cost of manufacturing these tiny components in any great quantity was a major obstacle. Today, this is no longer the case.

At Croft Filters, we have developed a machine that automates the entire process of making Dixon Rings at high speed. As a result, we can produce Dixon Rings in very high volumes - something we could never have achieved without our employees’ outstanding design skills and manufacturing excellence.

Random Column Packing

Available in diameters of 1/16", 1/8" and 1/4", Dixon Rings can be packed in their millions into distillation columns, producing a remarkably large surface area in a small volume. See: Dixon Rings – Filtration Journal

The high-quality mesh sleeves we produce are used for fixing and fastening in the construction industry.

Commonly referred to as ‘adhesive anchor suits’ or ‘bonded anchor mesh sleeves’ our adhesive anchor mesh sleeves provide a high-performance solution for adhesive anchoring into hollow materials.

While we stock mesh sleeves with diameters of 6mm-32mm, we can manufacture sleeves to your specifications: of various lengths and diameters, and with crimping styles to suit your specific requirements.

 

Materials:

Croft Filters can supply wire mesh in all kinds of styles. We carry a wide range of stock and can usually provide next-day delivery. Supplying the mesh itself is only part of our offering: we can also add significant value by forming the raw material into products that meet your exact specifications. Mesh can be used in a huge variety of applications and we have a history of providing solutions to a wide range of industries.

Croft Filters supply perforated plate in a range of styles and sizes – many of which we carry as stock items - and we can also manufacture this material to your precise specifications. The speed at which we can deliver is yet another factor that differentiates us from our competitors, since we can usually provide next-day delivery of both stock items and customised filters, although customised filters can take longer in some cases, depending on the complexity of the design and the material being used.

Croft Filters supply wedge wire, a profiled wire used to construct a screen which is both robust and extremely accurate. Usually manufactured from stainless steel, it comes in various forms: flat panels, curved panels, segments or sections, to form floors, discs and drums, and also in a cylindrical form known as a ‘slot tube’. Performing extremely well in applications requiring accuracy as well as strength, wedge wire is suitable for maintenance-free situations and high-pressure applications. Apertures range from 0.1mm to 20mm, complemented by wire profiles and support wires.

With a design that helps the screen clear easily and is less likely to peg or blind, wedge wire is a unique material.

Additive Manufacturing is the latest in a long line of innovations by Croft Filters. This is an advanced process that involves fusing materials, layer by layer, to make objects from a CAD (Computer-Aided Design) drawing. As an additive process, it is the exact opposite of conventional subtractive manufacturing processes, such as punching, turning and cutting.

Additive Manufacturing employs three-dimensional printing to transform engineering design files into fully functional, durable objects, made of a wide variety of materials. Our Additive Manufacturing system takes a CAD file and repeatedly lays down fine powdered material, fusing it to gradually build the finished product.

This process is enabling the design of filters with superior flow efficiency rates that retain the mechanical properties of materials our customers are familiar with in conventionally manufactured filters. Geometrically optimised, the new filter designs we are able to create can generate considerable savings in terms of pumping energy costs.

The future of filter manufacturing, Additive Manufacturing delivers a number of major advantages besides superior design. With no weld/join lines, the parts are inherently stronger – and since this process eliminates a number of stages used in conventional manufacturing, they can also be produced much more rapidly.

Applications:

Croft Filters offer you the benefit of our many years of experience working with the Chemical, Oil and Gas sectors to solve their filtration challenges. Often, it takes innovative filtration solutions to address the serious health and safety issues in these sectors – and after more than 20 years of supplying filter beds, baskets, sieves, cylinders and screens to a wide range of organisations, delivering a huge variety of customised solutions, we’re experts at working closely with our customers to understand their exact needs.

If you have any specific filtration requirements or would like further information on filtration in the Chemical, Oil and Gas sectors, please complete our enquiry form.

Croft Filters have spent many years working with organisations involved in power generation, a sector in which compliance with strict regulatory guidelines is an absolute must.

Filtration plays a pivotal role in the safe and efficient running of plants in the power generation sector and we’re proud to provide high-quality solutions at a speed that sets us apart from our competitors.

We’re the ideal partner for companies that work in the food and beverage sector. With such a range of production techniques in use, the production problems that arise are many and varied – but each one calls for a quick and effective response. We’re proud of the many unique filtration solutions we’ve designed and delivered to leading manufacturers.

We supply sieves, screens, baskets and strainers, deployed in sizing, grading and separation processes. Our filters can be made from a range of materials, manufactured to any size or specification.

If you have any specific filtration requirements or would like further information on filtration in the Food and Beverage sectors, please complete our enquiry form.

Croft Filters play a pivotal role in waste management and water treatment, a sector in which companies need absolute confidence that their processes comply with strict regulations.

Which explains why they come to us. With many years of experience and a comprehensive range of strainers and baskets, we’ve proved ourselves time and again as a supplier of high-quality, reliable solutions that meet each customer’s precise needs.

If you have any specific filtration requirements or would like further information on filtration in the Utilities and Waste Management sectors, please complete our enquiry form.

We've spent years supporting the pharmaceutical sector, throughout Europe and further afield, providing components that play a vital role in our customers’ production processes. We manufacture high-quality sieves and screens to precise specifications, particularly for the granulation process, and we’ve established ourselves as a trusted partner with a history of meeting highly customised requirements in terms of product purifying and sizing.

If you have any specific filtration requirements or would like further information on filtration in the Pharmaceuticals sector, please complete our enquiry form.

With over two decades’ experience providing filtration solutions, we’re well equipped to cater for both customised requirements and replacement components.

If you have any specific filtration requirements or would like further information on filtration in the power generation sector, please complete our enquiry form.

Rent Your Filters

Croft Filters Interchange service aims to replace throw away filters with reusable, metal filters.

This service helps companies save money, reduce waste and help the environment.

Originally developed as part of a Shell STEP programme, the Croft Filters Interchange is driven by the idea that many companies spend thousands of pounds every year on throwaway filters; a wasteful practice which draws on more resources, harming the environment.

If you are currently using throwaway filters, simply send a sample of your filter to Croft Filters. Our engineers will then assess whether there is an opportunity to supply a metal filter to do the same job, which can be cleaned or refurbished and then reused.

Whatever your filters are used for and whatever level of filtration you require, Croft Filters will look at the possibility of making a reusable filter to replace your current throwaway filter.

Contact Us

 

 
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