Simone Lawson
W.S. Tyler™ Sieves are recognised as the standard for quality and precision in particulate testing. The basis for the first Test Sieve standard was developed by W.S. Tyler over 100 years ago. Repeatable test results and particle size distribution curves are extremely important to quality control programs. Their test sieves are fabricated using quality materials, including woven wire mesh woven to ASTM-E11/ISO 3001 standards. The accuracy of test sieves is only as good as the fabrication process used to build them. The alloy of the test sieves determines how well it performs. This article will explore what constitutes a complete set of Tyler sieves.
| Characteristics | Values |
|---|---|
| Material | Clear acrylic, stainless steel, brass, nylon, or a combination of stainless steel and brass |
| Mesh | Woven wire mesh, test sieve cloth |
| Mesh openings | Exact and in compliance with ASTM or ISO standards |
| Frame height and diameter | Various, including 3”, 6", 8”, 10", 12", 18" & 200mm diameters |
| Wire diameter | Various |
| Mounting | Various |
| Accessories | Test sieve covers, cleaning brushes, ultrasonic test sieve cleaner, sieve pans |
| Certification | ISO-certified, ASTM E-11, ISO 3310-1, BS 410 specifications |
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What You'll Learn
The fabrication process
Materials
The first step in the fabrication process involves selecting the appropriate materials for the sieves. The alloy or material chosen determines the sieve's performance, durability, chemical resistance, and accuracy. For instance, W.S. Tyler sieves are fabricated using quality materials, including woven wire mesh that meets ASTM-E11/ISO 3001 standards.
Assembly
The assembly process of a test sieve begins with forming a frame. A coil of stainless steel is placed into a stamping machine that punches out blanks correlating with the desired diameter size of the sieve. These blanks are then drawn to create the cylindrical shape of the frame, with the lip curled over to eliminate any sharp edges. The skirt is then stamped from raw material, similar to the frame formation.
Mesh Tensioning
The test sieve mesh is then carefully tensioned to achieve a drum-tight surface. This mesh is soldered to the top edge of the skirt, ensuring a secure fit. The mesh openings must comply with the tolerances set by ASTM or ISO standards, with specific regulations for test sieve cloth differing from other mesh products.
Quality Control
W.S. Tyler emphasizes quality control in their fabrication process. The materials used to assemble the sieves are typically produced and stored within their facility, allowing for close monitoring of the construction process. This enables them to meet stringent accuracy and reliability standards, such as ISO-certified processes, to ensure consistent and accurate measurements.
Accessories
To enhance the functionality of the sieves, W.S. Tyler offers a range of accessories. These include cleaning brushes made from brass or nylon, depending on the mesh size, and ultrasonic cleaners for effective debris removal. Protective covers are also available to secure the sample material within the sieve stack.
Customization
Recognizing that different applications may require unique specifications, W.S. Tyler provides a catalog of specialty non-standard sieves. These sieves are fabricated to accommodate specific guidelines, such as the ISO 3310 and ASTM E-11 standards. This customization ensures seamless testing with unconventional requirements.
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Materials used
The materials used in the construction of test sieves are critical to their performance and durability. W.S. Tyler, a world-leading manufacturer of test sieves, offers a range of materials to suit different applications.
One of the most common materials used in W.S. Tyler test sieves is stainless steel. Stainless steel is known for its durability and corrosion resistance, making it suitable for a wide range of applications. The stainless steel is formed into a cylindrical shape to create the frame of the sieve. The lip of the frame is curled over to eliminate sharp edges and ensure safe handling.
Another material used in test sieves is brass. Brass is often used in combination with stainless steel, offering a balance between strength and flexibility. Brass sieves are also available with coarser mesh sizes, making them suitable for specific applications.
Clear acrylic is another material used in W.S. Tyler's sonic sieves. These sieves are designed to allow for visual analysis of material passing through the sieve stack. The clear acrylic construction enables users to observe the sieving process directly, ensuring precision and accuracy.
The choice of alloy is crucial in determining the performance characteristics of the test sieves. Different alloys offer varying levels of durability, chemical resistance, and accuracy. W.S. Tyler offers a range of alloys, including stainless steel and brass, to meet the specific requirements of different industries and applications.
In addition to the frame and mesh, test sieve cloth is also constructed using specific materials. The cloth is woven differently from other mesh products, with precise mesh openings that comply with ASTM and ISO standards. This ensures consistent and accurate results across different laboratories, adhering to stringent quality control measures.
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Mesh openings
The mesh openings in a test sieve are a critical component, as they determine the accuracy and consistency of the particle size distribution curves generated during testing.
W.S. Tyler, a leading manufacturer of test sieves, emphasises the importance of precise mesh openings. They ensure that the mesh openings in their test sieves comply with the stringent tolerances set by ASTM (American Society for Testing and Materials) and ISO (International Organization for Standardization) standards. This compliance guarantees the accuracy and reliability of particle size analysis using their sieves.
The mesh openings in test sieves can vary depending on the specific application and industry requirements. For example, in pharmaceutical production, where precise particle size distribution is critical, finer mesh openings may be utilised to ensure product consistency. On the other hand, in food processing, the mesh openings might be larger to accommodate the unique characteristics of food particles.
The material used for the mesh also plays a significant role in the performance of the test sieve. W.S. Tyler offers test sieves fabricated with quality materials, including woven wire mesh that meets ASTM-E11/ISO 3001 standards. This mesh is designed to provide accurate and repeatable results across various industries.
Additionally, proper maintenance of test sieves is essential to maintain the integrity of mesh openings. W.S. Tyler provides specialised cleaning brushes for their sieves, with nylon brushes designed specifically for cleaning finer mesh openings without causing damage.
In summary, mesh openings in test sieves are a critical aspect of particle size analysis. By adhering to strict standards, utilising appropriate materials, and implementing proper maintenance practices, companies like W.S. Tyler ensure the accuracy and reliability of their test sieves across a wide range of applications.
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Frame height and diameter
W.S. Tyler™ Sieves are recognised as the standard for quality and precision in particulate testing. The frame height and diameter of a test sieve are fabricated under ASTM E-11 standards, which include mesh openings, wire diameter, and mounting. These features ensure precise tolerance requirements are met, driving confidence in particle size analysis operations.
The frame height of a test sieve can vary depending on the specific application and particle size distribution curve required. W.S. Tyler offers standard test sieves and deep-frame wet wash test sieves, both fabricated with quality materials, including woven wire mesh that adheres to ASTM-E11/ISO 3001 standards. The depth options for the standard test sieves are 1", 1-5/8", 2", and 3-1/4" for the 12" sieves. Similarly, the 3" sieves have depth options ranging from 5/8" to 1-1/4".
The diameter of a test sieve is an important factor in particle size analysis. W.S. Tyler sieves are available in various diameters, including 3", 6", 8", 10", 12", 18", and 200mm. These different diameter options allow for flexibility in testing different particle sizes and sample amounts.
The accuracy and reliability of test sieves are crucial. W.S. Tyler offers test sieve certification services to inspect mesh size, integrity, and other vital elements. This ensures compliance with stringent accuracy and reliability standards, providing peace of mind for users.
The assembly process of a test sieve begins with forming a frame. A coil of stainless steel is placed into a stamping machine, punching out blanks that match the sieve's diameter. The blanks are then drawn to create the cylindrical shape of the frame, with the lip curled over to eliminate sharp edges. This attention to detail in the fabrication process ensures accurate and consistent results when using W.S. Tyler test sieves.
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Particle size analysis
W.S. Tyler developed the basis for the first Test Sieve standard over 100 years ago. Since then, W.S. Tyler has developed a vast range of test sieve specifications, allowing users to generate reliable particle size distribution curves. W.S. Tyler's standard test sieves are fabricated under ASTM E-11 standards and feature mesh openings, frame height and diameter, wire diameter, and mounting needed to accommodate precise tolerance requirements. The company also offers test sieve certification services designed to inspect the mesh size, integrity, and other vital elements of test sieves.
The accuracy of test sieves is dependent on the fabrication process used to build them. W.S. Tyler's ISO-certified process ensures that sieves measure accurately and consistently. The alloy of the test sieves also determines their performance, with different materials offering varying levels of durability, chemical resistance, and accuracy.
To ensure precise and consistent test sieve analysis results, it is important to maintain the performance of the sieves through regular and dependable maintenance. Wear and tear will inevitably cause dips in test sieve performance over time.
There are also accessories available that are designed to promote accurate and repeatable results, such as cleaning brushes and test sieve covers. Ultrasonic test sieve cleaners are compact and portable devices that operate on a 110-volt, 60-cycle current and are designed to safely and effectively remove stubborn debris from test sieves. Test sieve covers serve as protective lids that keep sample material within the sieve stack and are available in various diameters to ensure a snug fit.
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Frequently asked questions
Tyler sieves are used for particle size analysis, a form of quality control that provides accurate insight into a product's individual particles.
The alloy of a test sieve determines its performance. Tyler sieves are made from materials such as stainless steel, brass, or a combination of both. They are also fabricated out of clear acrylic, allowing for visual analysis.
A complete set of Tyler sieves would include a range of mesh opening sizes, as different materials require different sets of sieves to obtain an even distribution of particles. The set should also include accessories such as cleaning brushes, an ultrasonic test sieve cleaner, and sieve covers to protect the sieve stack.
