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The Thesvin sintered activated carbon stick Ф51×127 is a coconut-shell-based carbon block filter designed for water purifiers, refrigerators, and coffee machines. It reduces chlorine, taste and odour, and certain heavy metals, making it suitable for residential and commercial water treatment. The cartridge features a 51 mm outer diameter and 127 mm length, ensuring a precise fit in compatible housings.
Fitment is the first consideration when replacing a carbon block. The Ф51×127 stick is engineered to slide into standard filter housings with a 51 mm bore, where it is typically held by end caps or a friction seal. The outer diameter and length are critical: even a 1 mm variance can cause bypass or leakage. Thesvin manufactures each stick to tight tolerances using a flexible sintering process that allows for custom diameters from Ф30 to Ф60 mm and lengths to match your drawing. End caps can be welded on request to suit specific port configurations. The surface is smooth and free from loose carbon dust, which helps maintain a clean installation and prevents downstream contamination.
The carbon block is made from high-iodine coconut shell activated carbon, known for its high adsorption capacity. It effectively reduces residual chlorine (bleach), unpleasant tastes and odours, and organic pollutants. Integrated food-grade ion exchange resin helps soften water by removing hardness minerals and certain heavy metals such as lead and mercury, reducing scale buildup in appliances. The porous structure provides a high initial flow rate and consistent filtration efficiency, while the sintered block prevents carbon fines from releasing into the water. This makes it ideal for pre- and post-filtration in reverse osmosis systems, direct drinking water dispensers, refrigerator water filters, and commercial coffee machines.
| Item | Detail |
|---|---|
| Product name | Water purifier / refrigerator carbon block filter (CTO filter) |
| Core filtration material | High-iodine coconut shell activated carbon + food-grade ion exchange resin |
| Key performance | Softens water, reduces scaling, adsorbs residual chlorine, removes colour and odour, intercepts heavy metals (lead, mercury) |
| Precision and life | Uniform microporous structure, high initial flow, high filtration accuracy, no carbon fines; large adsorption capacity for long service life |
| Standard sizes (OD × length, mm) | Ф60×130 / Ф62×240 / Ф37.5×75 / Ф38×57 / Ф40×195 / Ф51×127 / Ф32×126 / Ф32×106 |
| Main applications | Residential RO purifiers (pre-CTO / post-T33), direct drinking dispensers, side-by-side refrigerator filters, commercial coffee machines |
| Customisation | OEM/ODM supported; custom diameters, lengths, and end cap welding available |
| Quality certification | Manufactured in a 20,000 m² facility certified to ISO 9001 and IATF 16949; CNAS-accredited laboratory for quality control |
Thesvin operates a 50,000 m² manufacturing facility in Zhongshan, Guangdong, including 6 clean rooms covering 20,000 m². Our quality management system is certified to IATF 16949 (2024) and ISO 9001, ISO 14001, and ISO 45001. We follow IQC, IPQC, and OQC procedures to ensure dimensional consistency and batch-to-batch reliability. Our CNAS-accredited laboratory supports filtration performance testing, including flow rate, pressure drop, and chlorine removal. Products comply with REACH and RoHS regulations, and we can provide compliance documentation. With over 20 years of export experience to Europe, the US, Japan, and Korea, we support OEM/ODM projects and have developed more than 1,000 filtration solutions. Monthly capacity reaches millions of pieces across multiple automated lines. Standard models typically ship within 7–15 days; custom orders usually take 25–35 days.
To get an accurate quotation, please provide the following: device or vehicle model, size or drawing (or send an old part), required airflow or water flow, operating conditions (temperature, pressure, water quality), and estimated quantity. Our engineering team will review your requirements and respond promptly. Contact us now to discuss your project.
The Ф51×127 stick is designed for housings with a 51 mm bore and 127 mm length. Check your current filter dimensions; if they match, it should fit. For custom sizes, we can manufacture to your drawing.
Yes. Send us a clear photo of the old part with measurements, or ship a sample. Our engineers will replicate the dimensions and connections.
The carbon block reduces chlorine by over 95% and effectively removes taste, odour, and certain heavy metals. Rated flow is approximately 1.0 L/min, with a recommended life of 6–12 months or 6,000 L, depending on water quality.
Yes. We offer custom diameters from Ф30 to Ф60 mm, lengths, and end cap welding. Provide your specifications, and we will develop a solution that fits your device.
Standard models have an MOQ of 1,000–2,000 pieces, with lead time of 7–15 days. Custom orders typically require 5,000 pieces and 25–35 days. Samples are available for testing.
Replace every 6–12 months or after 6,000 L of water, whichever comes first. If you notice reduced flow or taste changes, replace earlier.
Yes. We provide 2–5 free samples of standard models; you only cover shipping. Custom samples may incur a fee, refundable on bulk orders. Sample lead time is 3–5 days for standard, 10–20 days for custom.
The facility is ISO 9001 and IATF 16949 certified, and products meet REACH and RoHS. Our CNAS-accredited lab provides test reports for filtration performance. Contact us for detailed documentation.