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The Thesvin sintered activated carbon stick Ф40×195 is a coconut-shell carbon block filter element for water purifiers, refrigerators with built-in water dispensers and commercial coffee machines. It reduces chlorine, taste and odour, colour and heavy metals such as lead and mercury, and its ion-exchange resin content helps soften water and inhibit scaling. It is aimed at appliance makers and water-treatment brands that need a drop-in cartridge with stable dimensions and custom end-cap options.
Fitment is the first thing to confirm with a carbon block. The Ф40×195 element is a rigid sintered stick, so it locates on its outside diameter and end faces rather than compressing into a housing like a loose granular fill. The 40 mm outside diameter and 195 mm length define the envelope; the mating housing bore, end-cap sockets and any centre tube must match those dimensions so the stick seats without side load. Because the block is formed in a mould, the outside diameter, inside diameter and length can be held to the drawing, and end caps can be welded on to suit the host manifold. That makes the interface predictable for RO pre-filter (CTO) and post-filter (T33) positions, direct-drinking dispensers, side-by-side refrigerator filters and coffee-machine water inlets.
When you specify a replacement, check three things: the bore that receives the stick, the end-cap geometry that seals and locates it, and the flow path through the housing. The sintered structure is uniform, so it will not channel or settle in service, and the block keeps its shape under normal operating pressure. If the existing part uses a different diameter or length, the same tooling approach can produce a matching size rather than forcing an adapter.
The filter media are high-iodine-value coconut-shell activated carbon and food-grade ion-exchange resin. The carbon provides a large adsorption capacity for residual chlorine (bleach), off-tastes and odours, colour and organic pollutants; the resin contributes water softening and helps capture heavy metals such as lead and mercury. The microporous structure is even, giving a high initial flow and fine filtration while avoiding black carbon fines in the treated water. Typical service life is 6–12 months depending on feed-water quality and flow, and the element is intended for use in potable-water systems where the housing and plumbing are already rated for drinking water.
| Item | Detail |
|---|---|
| Product name | Carbon block water filter / CTO filter for water purifiers and refrigerators |
| Core filtration media | High-iodine-value coconut-shell activated carbon with food-grade ion-exchange resin |
| Core performance | Softens water and inhibits scaling; adsorbs residual chlorine (bleach); removes off-colour and off-odour; captures harmful heavy metals such as lead and mercury |
| Precision and service life | Uniform microporous structure, high initial flow, fine filtration without black carbon fines; high saturation capacity and long service life |
| Common size references (OD × length, mm) | Ф60×130 / Ф62×240 / Ф37.5×75 / Ф38×57 / Ф40×195 / Ф51×127 / Ф32×126 / Ф32×106 |
| Main end applications | Household reverse-osmosis purifiers (RO pre-filter CTO / post-filter T33), direct-drinking dispensers, side-by-side refrigerator water filters, commercial coffee machines |
| Customisation | OEM/ODM supported; length, diameter and inside/outside diameter ratio can be tooled to the device, with custom end-cap welding |
| Quality system | Production base certified to ISO 9001 and IATF 16949; filter media meet potable-water safety standards; CNAS-accredited testing centre for quality control |
Thesvin operates a 50,000 m² production site in Zhongshan, Guangdong, China, including six clean workshops totalling 20,000 m². The quality system is certified to ISO 9001, ISO 14001 and ISO 45001, and the site gained IATF 16949 certification in 2024. Dimensional consistency is controlled through IQC incoming inspection, IPQC in-process checks and OQC outgoing inspection, so each batch of sintered sticks is checked against the approved drawing before packing. An in-house laboratory accredited by CNAS carries out filtration-efficiency, dust-holding and resistance testing and issues reports, and products can be supplied with REACH and RoHS compliance documents. With more than 20 years of filtration manufacturing and export experience to Europe, the United States, Japan and Korea, we support OEM/ODM projects covering size, structure, media grade, end caps, logo and packaging, and have developed more than 1,000 filtration solutions.
To get a quotation, send the device or vehicle model, the size or a drawing (a photo of the old part is acceptable), the water flow or airflow, the operating conditions and the quantity you plan to order. Our engineering team will confirm the fitment and propose the closest standard size or a custom tool. Use the contact page to start the inquiry.
Fit depends on the housing bore, the end-cap sockets and the length. The Ф40×195 element is a rigid sintered stick, so the 40 mm outside diameter and 195 mm length must match the space in your housing. Send us the device model and a drawing or photo of the old part, and we will confirm whether the standard size fits or a custom tool is needed.
Yes. A used carbon block with a ruler in the photo is often enough for our engineers to read the outside diameter, length and end-cap shape. We can then match the interface and propose a sample for fit testing before you commit to production.
The high-iodine-value coconut-shell carbon is specified for strong residual-chlorine (bleach) removal, off-taste and odour reduction and heavy-metal capture such as lead and mercury. Because performance depends on feed-water quality and flow, we recommend confirming the duty point with us and validating the element on your own test bench.
Yes. The sintered process supports OEM/ODM tooling for length, diameter and inside/outside diameter ratio, and end caps can be welded to suit your manifold. Common reference sizes range from Ф32×106 to Ф62×240, so a matching size can usually be developed from your drawing or sample.
For standard sizes the MOQ is typically 1,000–2,000 pieces, while custom sizes are suggested from 5,000 pieces. Standard stock ships in about 7–15 days, and OEM production runs generally take 25–35 days after sample approval. Your exact quantity and packaging requirements are confirmed at quotation.
Yes. Standard-size samples are usually sent within 3–5 working days, and custom samples take about 10–15 working days to develop. Samples can be supplied with test data from our CNAS-accredited laboratory so you can check fit and performance before releasing a bulk order.
Typical service life is 6–12 months, depending on feed-water quality and daily flow. A shorter interval is advisable where chlorine or sediment loading is high. The element is intended as a replaceable cartridge, so plan the change interval with the appliance maintenance schedule.
Send the device or vehicle model, the size or drawing, the water flow or airflow, the operating conditions and the quantity to our team through the <a href="/en/contact">contact page</a>. We will reply with the closest standard size or a custom proposal, sample timing and price.