10077549 M20-Internal G1/4ED Connector Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

10077549 M20-Internal G1/4ED Connector Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

10077549 M20-Inner G1/4ED connector is a Sany original factory exclusive connector, designed specifically for the connection scenario of SY1250H mining hydraulic system, adaptable to the high pressure fluid transportation requirements of this model, integrating high pressure sealing, precision thread, corrosion resistance and vibration resistance, and convenient installation core characteristics, conforming to GB/T 14034.1-2023 “Hydraulic transmission connection metal pipe fittings part 1: 24° tapered”, GB/T 40565.3-2021 and other national and industry standards [2][5], matching the connection of SY1250H hydraulic pipeline, valve group and instrument components, and adaptable to ED ring sealing structure. It is suitable for open-pit mining, and can avoid high pressure fluid leakage, loose joints and other faults. It is a key original factory accessory for ensuring the stable operation of the hydraulic system in the mine.

Core technical parameters

Model: 10077549 (Specification: M20-inner G1/4ED)
Main body material: 304 stainless steel or 20# carbon steel are both available.
Operating temperature: -30℃ to 150℃, suitable for open-pit mines with large day-night temperature differences and high-temperature environments in hydraulic systems.
Key operating parameters: Thread specification M20×1.5 (metric) + internal G1/4 (55-degree non-threaded sealing pipe thread), compatible with ED ring sealing structure, ED ring size fits M20 specification (17.8×22.9×1.5mm); working pressure up to 60MPa; precision machining process, thread tolerance conforms to GB/T 197-2018 standard, surface roughness Ra≤0.4μm, service life≥8000 working hours, salt spray resistance≥1200 hours.
Structural design: It adopts a threaded connection structure with built-in ED ring seal, which has a better sealing effect than traditional O-rings and less mechanical deformation of the cross section under high pressure; the end of the connector is equipped with a sealing groove for precise fitting of the ED ring installation; it adopts a hexagonal shape design.
Shape and size: The shape is hexagonal prism with a regular structure, no burrs or cracks. The size is precisely matched with the SY1250H hydraulic pipeline, valve block and ED ring. It is customized according to the original factory standard and can be directly replaced by the original factory. The thread fit is precise and there is no looseness after installation.
Surface treatment: The stainless steel version adopts a dual treatment of mechanical polishing and passivation, while the carbon steel version adopts phosphating and high-temperature powder coating. It is corrosion-resistant and wear-resistant, and can effectively resist the erosion of high humidity, high dust and hydraulic oil in the mine, prevent rust and scale, and avoid sealing failure and loosening of connections due to rust.

Core functions and roles

As the “high-pressure connection and sealing core component” of the SY1250H, its core function is to connect hydraulic pipelines, valve blocks, and instruments to achieve sealed delivery of high-pressure fluid, fix the pipeline connection position, and buffer the impact of vibration on the connection parts. It can prevent hydraulic system pressure insufficiency, component corrosion, and other failures caused by high-pressure fluid leakage, extend the service life of core components such as pipelines and valve blocks, reduce operation and maintenance costs, and work in conjunction with the ED ring and hydraulic pipelines to form a sealed delivery system. It is a key connection component ensuring the stable and efficient operation of mining hydraulic systems.

Applicable Scenarios

Widely used in the connection parts of the SY1250H mining hydraulic system, it is compatible with the connection of hydraulic pipelines, valve groups and instruments, and undertakes the functions of high pressure sealing, fluid transportation and pipeline connection. It can also be used with the same specification mining hydraulic system of Sany [4][5]. It is suitable for open-pit mines, earthwork and other high dust and high pressure harsh working conditions. It is an essential hydraulic connection accessory for equipment manufacturing, overhaul, after-sales maintenance and bulk purchase. It can reduce the downtime cost caused by leakage and improve the operating stability of the hydraulic system.

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