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Product Name | Sanheng 90° 20491 DKO Metric Female 24° Cone O-ring Elbow Swaged Hose Fitting |
Code | 20491 20492 |
Material & Surface Treatment | Carbon steel (zinc plated Cr3+); Stainless steel (passivation) |
Application | Pipe connection（oil,water,gas） |
Technology | CNC machining & Forged |
Package | All adapters equipped with thread protective end caps, inside plastic bags, and then inside standard blank carton boxes. |
Our main products | Threaded hydraulic hose fittings and pipe adapters, sucn as Metric , BSP, BSPT, NPT , JIC , ORFS, SAE thread. |
The 20491/20492 DKO 90° swaged elbow is professionally engineered for compact layout design of high-pressure hydraulic hose systems. Adopting metric female thread combined with 24° cone O-ring DKO sealing structure, it realizes smooth 90° fluid steering in narrow equipment space. Made of integrally forged blank with CNC precision processing, the fitting features dense internal structure and strong pressure bearing capacity up to 4000 psi. The dual sealing design of 24° cone plus O-ring effectively isolates fluid leakage, and maintains stable sealing performance under strong vibration and instantaneous pressure impact. With reliable surface anti-corrosion treatment, it adapts to long-term delivery of hydraulic oil, water glycol and compressed gas media, perfectly matching light series metric pipeline systems.
Manufactured strictly in accordance with DIN 3865 and ISO 12151-2 international standards, specially designed for metric light series hydraulic pipelines. All thread dimensions, 24° cone angle and sealing groove are precisely controlled by high-precision processing. With maximum working pressure up to 4000 psi, it can be perfectly interchanged with mainstream brand standard parts. Complete dimension drawings and parameter sheets can be provided according to actual model demands.
90° Compact Steering Design: Reasonable arc bending minimizes internal fluid turbulence and pressure loss, suitable for narrow installation space and compact mechanical layout.
DKO 24° Cone O-ring Sealing: Combined metal cone and elastic O-ring double sealing structure, absorbs vibration displacement, achieves long-term zero-leakage operation.
Strong Anti-Vibration Structure: Integral forging plus swaged hose connection enhances overall stability, effectively preventing joint loosening in continuous vibration working environment.
Easy Assembly & Wide Media Adaptation: Standard metric female thread ensures smooth installation without galling, stably conveying hydraulic oil, mixed water agent and various industrial compressed gases.
Carbon Steel (Cr3+ Zinc Plated)
Adopts eco-friendly trivalent chromium zinc plating craft, with excellent surface hardness and salt spray resistance, high mechanical strength and cost performance, ideal for conventional industrial hydraulic and general equipment pipeline use.
Stainless Steel (Passivation)
Through professional passivation treatment, it removes surface impurities and forms a dense protective oxide layer, with outstanding chemical resistance and moisture corrosion resistance, suitable for marine, chemical and high humidity harsh working conditions.
This DKO 24° cone O-ring 90° swaged elbow is widely used in high-pressure hydraulic hose steering connection of various core industries:
Construction & Agricultural Machinery: Hydraulic hose steering and layout connection for excavators, loaders, tractors and harvesters.
Manufacturing & Metallurgical Industry: Hydraulic circuit layout, fluid steering connection for machine tools, automated production lines and metallurgical equipment.
Marine & Offshore Engineering: Supporting hydraulic hose fittings for ship machinery, offshore platform fluid pipeline systems.
General Industrial Hydraulic System: Pipeline steering assembly of high-pressure hydraulic station, pneumatic control and fluid conveying equipment.
Adopts integral hot forging molding to optimize metal grain arrangement, making the body denser and more pressure-resistant. Metric internal thread and 24° DKO cone sealing surface are processed by multi-axis CNC equipment to ensure precise angle and dimensional tolerance. All products pass strict thread detection, pressure impact test and sealing performance inspection, fully complying with DIN and ISO standard requirements, ensuring stable and reliable service in high-pressure and vibrating hydraulic systems.
To assist your technical and procurement teams, we have compiled detailed answers to the most common inquiries regarding our swaged hose fittings and manufacturing capabilities. This information is designed to facilitate informed decision-making.
The DKO sealing mechanism is specifically designed for dynamic, high-stress environments. The 24-degree metal-to-metal cone provides intense structural rigidity, while the captive O-ring absorbs micro-vibrations and compensates for slight misalignments. This dual-action design ensures that the seal remains completely intact, preventing fluid weepage even in heavy machinery subject to constant shock loads and operational tremors.
Yes. The standard carbon steel and stainless steel bodies are chemically inert to most hydraulic media. However, compatibility largely depends on the O-ring material. Our standard O-rings are highly resistant to petroleum-based and many synthetic fluids. If your application involves highly aggressive synthetics, aerospace fluids, or extreme temperature ranges, please consult with our engineering team to specify specialized elastomeric seals tailored to your needs.
We maintain strict, uncompromising traceability for all our products. Upon request, we can provide comprehensive material test reports (MTRs), detailed dimensional inspection logs, and certificates of conformance that explicitly state compliance with DIN 3865 and ISO 12151-2 standards. This rigorous documentation ensures your quality assurance requirements and audit trails are fully satisfied.
Our passivation process strictly adheres to the highest industry best practices. The machined stainless steel fittings are submerged in a precise acid bath (typically nitric or citric acid-based) which dissolves any free iron contaminants left behind by the cutting tools. This promotes the rapid formation of a thick, uniform chromium oxide layer, maximizing the inherent corrosion resistance of the stainless steel for long-term durability.
