DN50 Galvanized Rubber Joint

The DN50 galvanized rubber joint is an economical anti-corrosion flexible connection accessory adopting hot-dip galvanized flanges paired with a flexible rubber main body. DN50, as one of the most commonly used small-diameter nominal diameters in building water supply and drainage, HVAC, and fire protection pipelines, combined with the anti-corrosion performance of hot-dip galvanized flanges, can operate stably for long periods under ordinary water environments and mildly corrosive working conditions, making it the most cost-effective flexible connection solution for civil and commercial building pipelines. The DN50 galvanized rubber joint adopts a single-sphere one-piece molding and vulcanization process, with the rubber matrix uniformly wrapped by internal multi-layer high-strength nylon cord, capable of simultaneously absorbing three types of pipeline displacement: axial expansion and contraction, lateral offset, and angular deflection, isolating vibration noise generated by water pumps and fans, reducing pipeline resonance loss, and avoiding the probability of leakage and cracking at flange welds and valve interfaces caused by repeated stress pulling from the source. The hot-dip galvanized flange surface forms a dense zinc layer protective film, effectively preventing flange rusting and extending the product's service life in humid environments.

Our factory has established an exclusive production line and standing stock for the DN50 galvanized rubber joint, this high-frequency small-diameter specification, enabling rapid production scheduling and shipment upon receiving full-container orders. Product flanges are made of high-quality carbon steel flanges treated with hot-dip galvanizing, with uniform zinc layer and strong adhesion, with anti-corrosion performance superior to ordinary painted flanges. The rubber main body is entirely made of brand-new virgin EPDM rubber compound, with no recycled waste material mixed in, and excellent aging resistance. Working pressure covers PN6-PN16, with working temperature range -15 to +80°C, meeting the operational needs of the vast majority of DN50 small-diameter building pipelines. Flange dimensions are compatible with the four major international standards of DIN, ANSI, GB, and JIS, with the bolt hole spacing and sealing surface dimensions of hot-dip galvanized flanges strictly machined according to corresponding standards, allowing customers to directly connect to existing pipelines on site. We support OEM private labeling, customized product total length, and reducer structures, with a customized sample development cycle of 15-20 days and a minimum order quantity of only 10 pieces. Currently, DN50 galvanized rubber joints have been exported in batches to over 80 countries and regions worldwide including Europe, America, the Middle East, Southeast Asia, and Africa. With the comprehensive advantages of hot-dip galvanized anti-corrosion + high cost-effectiveness + sufficient in-stock, they have become regular volume bestsellers for overseas building materials wholesalers and plumbing accessory dealers, with repeat purchase orders continuing to grow steadily.

The product is widely used in civil building water supply and drainage DN50 pipelines, central air conditioner HVAC circulating water pipes, community secondary water supply pump room small-diameter pipelines, fire protection DN50 sprinkler branch pipes, factory industrial circulating water small-diameter pipelines, outdoor exposed water supply and drainage pipelines, and other ordinary water environment working condition scenarios. It can be matched with various small water pumps, heat exchangers, gate valves, and water meters to achieve vibration damping and displacement compensation.

As a source manufacturer specializing in pipeline flexible connection products, we have a complete rubber pipe fitting production line and independent R&D capability. Our factory covers an area of 10,000 square meters, with a standing production and technical team of over 50 people, capable of stably handling batch orders and customized projects. The factory is equipped with professional production equipment such as CNC cloth cutting machines, automatic turn-up molding machines, fully automatic vulcanizing machines, and hot-dip galvanizing treatment equipment, controlling the entire process from rubber compound mixing, product molding to flange galvanizing and finished product assembly independently. Monthly production capacity can reach 15-20 standard containers, with DN50 galvanized general-purpose models kept in sufficient stock to quickly respond to customers' full-container replenishment needs. We have been deeply engaged in the industry for over 20 years, with products exported to over 80 countries and regions worldwide. We are familiar with the building pipeline standards and market preferences of different regions, and can provide cost-effective product solutions adapted to local markets for overseas purchasers and distributors.

We implement full-chain quality control over DN50 galvanized rubber joints. Before hot-dip galvanized flanges enter the factory, they must undergo zinc layer thickness testing and adhesion testing to ensure galvanizing quality meets anti-corrosion requirements. Before rubber compounds enter the factory, they undergo composition and performance testing to ensure raw materials meet environmental and performance standards. During production, vulcanization temperature, time, and pressure are precisely controlled to ensure stable and consistent performance of each batch of products. Before finished products leave the factory, 100% undergo water pressure testing and appearance inspection, with focus on checking whether the galvanized layer has scratches or peeling. The factory has a complete set of testing equipment including pressure testing machines, universal tensile machines, thermal aging test chambers, and zinc layer thickness gauges, capable of issuing complete test data reports. We also support third-party inspection designated by customers, ensuring the stability and reliability of product quality from the source.

The full series of DN50 galvanized rubber joints possess complete international compliance qualifications. The production system has passed dual certification of GB/T19001-2016/ISO9001 Quality Management System and GB/T45001-2020/ISO45001 Occupational Health and Safety Management System. The products have obtained CE and RoHS compliance licenses, along with supporting material MTC certificates and certificate of origin (CO). All qualification documents can be provided in electronic version in advance for overseas building project bidding, or can be sent in paper form with the goods. Complete compliance qualifications can help distributors smoothly undertake municipal and commercial building project orders, avoiding bid loss and customs clearance obstruction caused by missing qualifications.

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