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This Ф38×57 sintered activated carbon rod is a coconut-shell carbon block with built-in ion-exchange resin, made by Jyntrel for point-of-use water filtration. It reduces chlorine, taste, odour and heavy metals while softening water, and is designed for RO pre-filters, refrigerators, water dispensers and coffee machines. It suits OEMs and appliance makers who need a compact carbon core with predictable flow and low fines.
In a water system, the rod sits in the flow path between sediment filtration and the RO membrane or outlet. Water enters the outer cylindrical surface, passes through the porous carbon wall and exits through the hollow core or end fitting, depending on the housing design. The pressure drop across the rod is a function of flow rate, water temperature and the carbon's permeability. The Ф38×57 format is typically used at household flow rates, where the combination of 38 mm outer diameter and 57 mm length gives a balanced contact time and pressure loss.
The ion-exchange resin is distributed within the carbon matrix. As water moves through, the resin exchanges hardness ions and some heavy metals, while the carbon adsorbs chlorine and organic compounds. The operating environment—chlorine level, turbidity, temperature and flow—determines how long the rod stays effective. For higher flow or larger appliances, a longer or wider rod from the same product family may be selected.
The carbon is a high-iodine coconut-shell grade, chosen for its adsorption capacity. The sintered structure gives a uniform pore network, so initial flow is high and the rod does not release black fines into the water. The built-in ion-exchange resin adds softening and heavy-metal reduction, which helps protect downstream components from scale. Typical chlorine reduction is 90% or more under the test conditions used for this product family. The rod is intended for the pre- or post-filter stage in drinking-water systems and is not a stand-alone purifier.
To recommend the right rod, we need the device or vehicle model, the available space and the connection drawing, the required flow rate or water flow, the operating pressure and temperature, the inlet water quality (chlorine, hardness, turbidity) and the order quantity. For OEM projects, we can adjust outer and inner diameter, length, end-cap style and packaging. The Ф30–Ф60 diameter range is flexible, and end caps can be welded to suit your housing. Share your drawing and target performance, and we will propose a specification.
| Item | Detail |
|---|---|
| Product name | Carbon block water filter / CTO filter for water purifiers and refrigerators |
| Core filtration material | High-iodine coconut-shell activated carbon + food-grade ion-exchange resin |
| Core performance | Softens water and inhibits scale; adsorbs chlorine (bleaching powder) and odours; reduces lead, mercury and other harmful heavy metals |
| Precision and service life | Uniform microporous structure, high initial flow, high filtration precision, no black fines; large adsorption capacity and long service life |
| Standard size reference (OD × length, mm) | Ф60×130 / Ф62×240 / Ф37.5×75 / Ф38×57 / Ф40×195 / Ф51×127 / Ф32×126 / Ф32×106 |
| Main applications | Household RO purifiers (pre-filter CTO / post-filter T33), direct drinking water dispensers, side-by-side refrigerator water filters, commercial coffee machines |
| Customisation | OEM/ODM supported. Length, diameter and inner/outer diameter ratio can be tooled to the device; end-cap welding available |
| Quality system | ISO 9001 and IATF 16949 certified production; materials meet drinking-water safety standards; CNAS-accredited laboratory for quality control |
The Ф38×57 rod is commonly used in household reverse-osmosis systems as a pre-filter (CTO) or post-filter (T33), in direct drinking water dispensers, in side-by-side refrigerators with built-in water filters and in commercial coffee machines. In each case, the rod's role is to protect the downstream membrane or appliance from chlorine, scale and particulates while improving taste. For appliances with different space or flow requirements, the same carbon and resin formulation can be supplied in other lengths and diameters.
Jyntrel operates multiple automated production lines with a monthly capacity of millions of pieces, which supports stable supply for OEM programmes. The 50,000 m² plant includes 20,000 m² of clean rooms across six workshops, where carbon rods are produced under controlled conditions. Our CNAS-accredited laboratory can issue test reports for filtration efficiency, dust-holding capacity and resistance, and we follow IQC, IPQC and OQC throughout production. The company has held ISO 9001, ISO 14001 and ISO 45001 certification, and in 2024 obtained IATF 16949. Products comply with REACH and RoHS, and we can provide compliance documents. With more than 20 years of export experience to Europe, the US, Japan and Korea, we support dimension, structure, media grade, logo and packaging customisation, and have developed over 1,000 filtration solutions.
To quote the right Ф38×57 carbon rod or a custom variant, please send us your device or vehicle model, the required size or drawing, the airflow or water flow, the operating pressure and temperature, and the quantity. Our engineering team will review your data and respond with a proposed specification and price. Contact us to start the conversation.
This is a water filter, so air velocity is not the relevant parameter. In water systems, the pressure drop depends on flow rate and temperature. The Ф38×57 rod is typically used at household flow rates; for higher flows, a longer or larger-diameter rod from the same family can be selected.
For water filtration, we need the water flow rate, inlet pressure, temperature, chlorine level and hardness. If your application involves air, please clarify, as this product is designed for water. Provide these details along with the device model and quantity, and we will recommend a specification.
Under the test conditions for this product family, chlorine reduction is typically 90% or more. Actual performance depends on inlet chlorine concentration, flow rate and water quality. We can provide test reports from our CNAS-accredited laboratory for specific batches.
Yes. We support OEM/ODM with outer diameters from Ф30 to Ф60, various lengths and end-cap welding. Share your drawing or housing dimensions, and we will propose a matching rod. Custom sizes may require tooling and a higher MOQ.
Standard sizes typically have an MOQ of 1000–2000 pieces, while custom sizes start at 5000 pieces. Standard items can ship in 7–15 days; custom orders usually take 25–35 days. Lead time may vary with order volume and packaging requirements.
Under standard conditions (inlet chlorine ≤2 ppm, flow 1 L/min), the effective life is about 3000–6000 litres or 6–12 months, depending on water quality and usage. Replace when flow drops noticeably or taste/odour returns. Each product is packaged with clear installation and replacement guidance.
Yes. We can supply 3–5 free samples of standard sizes (freight collect). For custom sizes, a sampling fee applies, which is refundable against mass production. Sampling takes about 7–10 working days. We also provide CNAS test reports to support your certification efforts.
Inlet chlorine, hardness, turbidity, water temperature and flow rate all affect the rod's life and efficiency. Higher chlorine or hardness will exhaust the media faster. For advice on your specific conditions, please share your water analysis and flow requirements with our team.