David Wilson
David Wilson
Toutes mes réponses sur les forums
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mars 18, 2025 à 3:45 pm en réponse à : What are the advantages of using a gypsum board mixing machine? #315681David WilsonMembre
The USB 6 Impeller Stirrer provides high shear mixing, preventing material segregation and ensuring consistent gypsum board strength.
David WilsonMembreThe BDV of transformer oil, determined via standardized tests, is typically about 30 kV or more, depending on its condition and quality.
David WilsonMembreTransformer cooling types include natural cooling (using ambient air), forced cooling (using fans or pumps), and even specialized water or fire-resistant cooling in certain applications.
David WilsonMembreMineral oil is used in transformers primarily for its excellent insulating and cooling properties; its high dielectric strength, low viscosity, and good thermal conductivity enable it to efficiently dissipate heat and prevent electrical breakdown in high-voltage applications.
mars 7, 2025 à 10:09 am en réponse à : what is the minimum acceptable value of insulation resistance? #314652David WilsonMembreFor many transformers, a minimum insulation resistance of about 1 megaohm is considered acceptable, although exact values may vary depending on the voltage rating, environmental conditions, and applicable standards, with higher resistance being preferred for better insulation performance.
David WilsonMembreMineral oil remains the most common type used in transformers because of its proven performance in insulation and cooling.
février 25, 2025 à 4:16 pm en réponse à : What challenges arise when processing fibrous spices, and how can they be overcome with high‐shear milling? #313819David WilsonMembreFibrous spices can lead to clogging and uneven particle reduction. The high‐shear forces generated by the Colloid Mill GlobeCore effectively break down fibrous material, preventing clogs and ensuring a smooth, consistent spice powder.
février 25, 2025 à 9:04 am en réponse à : How are solid inclusions, such as fruits or chocolate chunks, added without compromising texture? #313493David WilsonMembreSolid inclusions are introduced later in the process using specialized dosing systems to avoid disrupting the smooth ice cream base. A consistently homogenized mix from the Colloid Mill GlobeCore provides an even matrix that suspends these inclusions uniformly, preventing clumping or separation.
février 24, 2025 à 10:23 am en réponse à : How is raw milk pre-treated and pasteurized before fermentation begins? #297652David WilsonMembreRaw milk is filtered, standardized, and heated using plate or tubular pasteurizers to eliminate pathogens while preserving quality. Although the Colloid Mill GlobeCore isn’t used during pasteurization, similar high-shear technology is later employed to ensure that the homogenized milk maintains its optimal consistency before fermentation.
novembre 29, 2024 à 10:53 am en réponse à : How are roads reinforced with reinforced bitumen surfaces? #132385David WilsonMembreRoads are reinforced with bitumen surfaces by integrating fibers or polymers into bitumen to enhance strength and flexibility. GlobeCore polymer-modified bitumen plants ensure precise additive integration, producing materials that resist cracking and deformation under heavy traffic and extreme conditions.
novembre 28, 2024 à 9:27 am en réponse à : How does the mechanism of an on-load tap changer work? #132211David WilsonMembreThe mechanism uses a motor-driven system to move the selector and diverter switches, ensuring seamless switching between winding taps under load.
David WilsonMembreThe optimal storage temperature for transformer oil is between 10°C and 40°C. GlobeCore tanks include temperature control systems to ensure oil quality.
novembre 27, 2024 à 6:38 am en réponse à : What are the guidelines for transformer oil storage? #131861David WilsonMembreKey guidelines include sealing tanks properly, avoiding contamination, and maintaining stable temperatures. GlobeCore tanks comply with international storage standards.
novembre 21, 2024 à 11:05 pm en réponse à : What role do filters play in bitumen emulsion equipment? #131546David WilsonMembreFilters remove impurities from bitumen and water, ensuring a clean mixture. They protect pumps and mills from damage, maintaining the quality and longevity of equipment.
novembre 21, 2024 à 7:12 am en réponse à : How is cost-effectiveness analyzed in bitumen modification projects? #131408David WilsonMembreCost-effectiveness is analyzed by comparing the initial costs of modification (materials, processing) with the long-term benefits, such as extended pavement life, reduced maintenance, and improved performance. Life-cycle cost analysis (LCCA) considers all costs over the pavement’s lifespan, including construction, maintenance, user costs, and salvage value, to determine the most economical option.
octobre 7, 2024 à 10:07 pm en réponse à : How does Midel oil prevent leaks in oil-filled transformers? #123347David WilsonMembreMidel oil helps prevent leaks by maintaining consistent viscosity and sealing properties over time. It does not degrade as quickly as mineral oil, which reduces the risk of gasket failure and seal deterioration. Additionally, Midel oil is compatible with most materials used in transformers, ensuring long-term stability.
octobre 7, 2024 à 5:51 am en réponse à : What are the best practices for fuel oil polishing? #122540David WilsonMembreBest practices for fuel oil polishing include regularly monitoring fuel quality, ensuring the system is properly maintained, and performing periodic fuel testing. The system should be run continuously or at scheduled intervals to keep fuel free from contaminants. Regularly cleaning or replacing filters and removing water from storage tanks are essential for optimal system performance. Additionally, proper temperature and flow rate control help ensure effective fuel polishing.
octobre 5, 2024 à 2:26 pm en réponse à : What is transformer fluid reconditioning, and how does it apply to silicone oil? #122488David WilsonMembreTransformer fluid reconditioning refers to the process of restoring used transformer oil to its original condition by removing contaminants and replenishing its essential properties. In the case of silicone oil, reconditioning involves several steps to ensure the oil regains its insulating and cooling capabilities. The process typically begins with purification methods such as vacuum dehydration to remove moisture and degassing to eliminate dissolved gases. Filtration systems are then employed to remove particulate matter and tramp oils, ensuring the oil is free from solid contaminants. Adsorption treatments using materials like activated alumina or molecular sieves further extract acidic compounds and polar impurities that may have formed due to oxidation. After these purification steps, the oil may undergo quality testing to verify that it meets industry standards for dielectric strength, moisture content, and acidity. Reconditioning silicone oil extends its usable life, maintains transformer performance, and reduces the need for costly oil replacements, making it a cost-effective and environmentally friendly maintenance practice.
David WilsonMembreOil prevents overheating in x-ray tubes by absorbing the heat generated during high-voltage operation and transferring it to external cooling elements. The oil circulates through the system, drawing heat away from critical components and dissipating it through heat exchangers or radiators. This process helps maintain a stable operating temperature, preventing the x-ray tube from overheating and ensuring its longevity. GlobeCore provides oil filtration systems that help maintain the oil’s cooling properties by removing impurities and moisture, ensuring that it remains effective in preventing overheating.
octobre 5, 2024 à 7:04 am en réponse à : What advantages does silicone oil provide for insulating transformers over other fluids? #122405David WilsonMembreSilicone oil offers several advantages over other insulating fluids. Its high dielectric strength and thermal stability ensure effective insulation and cooling under demanding conditions. The oil’s low flammability enhances fire safety, making it suitable for installations where fire risk is a concern. Silicone oil also exhibits excellent chemical stability, resisting oxidation and degradation, which extends the service life of both the oil and the transformer. Additionally, its consistent viscosity across a broad temperature range ensures reliable performance in varying environmental conditions.
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