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This is a sintered activated carbon block water filter, Ф60×130 mm, built by Ranveth for point-of-use water treatment. It filters chlorine, taste and odour, colour, volatile organics and part of the heavy metals such as lead and mercury, while the ion exchange resin blended into the body softens the water and limits scale. It is intended for household reverse osmosis systems as a pre-carbon (CTO) or post-carbon (T33) stage, drinking water dispensers, side-by-side refrigerator water systems and commercial coffee machines.
A carbon block is only as good as the way its materials are matched. Here the pairing is straightforward and deliberate: high iodine value coconut shell activated carbon carries the adsorption duty, and food-grade ion exchange resin is distributed through the same sintered body to soften the water and bind heavy metals. The two work on different problems at the same time, so one cartridge does the work that often needs two stages.
The layer build follows the same logic. The carbon is sintered rather than simply packed, which gives a uniform microporous structure across the wall thickness. A uniform pore structure means water meets the same resistance everywhere, so initial flow is high and pressure drop stays predictable through the cartridge. It also means the block does not shed fine black carbon particles downstream, which is the failure mode buyers notice first in loose-filled cartridges.
Because the carbon has a high iodine value and the body carries a large saturated adsorption capacity, the pairing gives a long service window before breakthrough. In practice, the media choice sets three things at once: efficiency (how much chlorine and odour is removed per litre passed), airflow and water flow resistance (how hard the cartridge is to push water through), and service life (how many litres before the capacity is spent). When a device needs more flow, we adjust wall thickness and outer diameter rather than diluting the carbon; when it needs longer life, we adjust length and carbon grade. That is the conversation we prefer to have with buyers early, because it is cheaper than fixing a flow complaint later.
| Item | Detail |
|---|---|
| Product name | Water purifier and refrigerator carbon block filter (carbon block / CTO filter) |
| Core filtration media | High iodine value coconut shell activated carbon plus food-grade ion exchange resin |
| Core performance | Softens water and limits scaling; adsorbs chlorine (bleaching powder) strongly; 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, no black carbon dust; large saturated adsorption capacity and long service life |
| Standard size reference (outer diameter × length, mm) | Ф60×130 / Ф62×240 / Ф37.5×75 / Ф38×57 / Ф40×195 / Ф51×127 / Ф32×126 / Ф32×106 |
| Main end applications | Household RO purifiers (pre-carbon CTO / post-carbon T33), drinking water dispensers, side-by-side refrigerator water filters, commercial coffee machines |
| Customisation service | Full OEM/ODM support. Length, diameter and inner/outer diameter ratio can be tooled to the device, with end-cap welding available |
| Quality systems | The 20,000 m² production base is certified to ISO 9001 and IATF 16949; filter media meet strict drinking water safety and hygiene standards and are controlled by a CNAS-accredited testing centre |
The Ф60×130 format is a common pre-carbon stage in household reverse osmosis purifiers, where it protects the RO membrane from chlorine and protects the taste of the finished water. The same block is used as a post-carbon (T33) cartridge where the goal is polishing taste after the membrane.
Drinking water dispensers and side-by-side refrigerators use the cartridge where the housing is compact and the water sits between draws, so odour control matters as much as chlorine removal. Commercial coffee machines are a further fit: chlorine and off-flavours carry straight into the cup, and the softening action of the resin helps keep the boiler and small passages free of scale. The standard size list covers Ф32 to Ф62 mm diameters and lengths from 57 to 240 mm, which spans most of these housings; where a device falls outside the list, the block is tooled to the drawing instead.
Custom builds are routine, but they go faster when the brief is complete. Please send:
With these in hand we can propose a media grade and wall thickness, then move to a sample for evaluation.
Media choices here are backed by testing. Ranveth's in-house laboratory is accredited by CNAS (China National Accreditation Service for Conformity Assessment), and it issues reports on filtration efficiency, dust holding capacity and resistance, so the carbon and resin pairing in this block can be verified rather than assumed.
Production sits on a 50,000 m² plant in Zhongshan, Guangdong, which includes six cleanrooms totalling 20,000 m². The quality system is certified to IATF 16949, awarded in 2024, and to ISO 9001, ISO 14001 and ISO 45001. Products meet REACH and RoHS requirements, and compliance documents can be supplied.
Ranveth has more than 20 years of filtration research and manufacturing experience, with continuous export to Europe, the United States, Japan and South Korea over that period. OEM/ODM covers size, structure, media grade, end caps, logo and packaging, and more than 1,000 filtration solutions have been developed. Multiple automated lines support output in the millions of pieces per month, and IQC, IPQC and OQC checkpoints run through the process.
To move forward, tell us the appliance or vehicle model, the size or drawing, the required water flow, the operating conditions and the quantity. We will reply with a suitable media build, sample options and pricing. You can reach the team through the contact page.
It combines high iodine value coconut shell activated carbon with food-grade ion exchange resin in one sintered body. The carbon adsorbs chlorine, taste, odour and organics, while the resin softens the water and binds heavy metals such as lead and mercury. Both duties run in a single cartridge, which reduces the number of stages a system needs.
Sintering gives a uniform microporous structure across the wall, so water meets even resistance and initial flow stays high with predictable pressure drop. The block does not shed black carbon dust downstream, and its large saturated adsorption capacity supports a long service window. Efficiency, resistance and life therefore follow from the media pairing and wall build rather than from a single number.
Yes. OEM/ODM is supported, and length, diameter and inner/outer diameter ratio can be tooled to your device, with end-cap welding available. Standard reference sizes run from Ф32×106 to Ф62×240 mm, including Ф60×130 mm. Send the housing drawing and target flow and we will propose a build.
Send the device or appliance model, the size or a dimensioned drawing, the required water flow rate, the operating conditions (inlet water quality, temperature, daily volume) and the quantity. End-cap, labelling and packaging requirements help as well. The team will respond with a media recommendation, sample options and pricing.
Standard sizes typically start at 1,000 to 2,000 pieces, depending on size and packaging, while custom sizes are suggested from 5,000 pieces. Stocked standard items usually ship in 7 to 15 days, and OEM production runs generally take 25 to 35 days. Scheduling from the Zhongshan plant is flexible for repeat customers.
Service life is typically 6 to 12 months, depending on inlet water quality and flow. The block carries a large saturated adsorption capacity, so the upper end of that range is realistic on clean feed water. We can advise on a replacement interval once we know your water analysis and daily volume.
Standard-size samples can be supplied free of charge, with the customer covering international courier cost, and custom samples carry a development fee that is refunded on a bulk order. CNAS laboratory reports and SGS test data can be provided alongside samples. Please contact us with your specification to start.