B210780000244 Split Flange Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

B210780000244 Split Flange Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

B210780000244 is a split flange with a special part number from Sany, designed specifically for the high-pressure pipeline connection scenario of SY1250H mining excavator. This model has a large operating load and high hydraulic system pressure. The pipeline connection part needs to withstand the impact of high pressure fluid and severe vibration, and the requirements for the flange’s pressure bearing capacity, sealing performance and connection accuracy are extremely high. It integrates the core characteristics of high-strength forged material, precision sealing structure, split type for convenient installation, and anti-vibration and anti-deformation, and complies with national and industry standards such as GB/T 9119-2020 “Plate Flat Welded Steel Pipe Flange”, SAE J518C, ISO 6162, etc. [1][2][4] and is equipped with SSY007338266 main pump connection body, A210204000465 screws, B230101000578 O-rings and pump room high-pressure pipeline. Suitable for open-pit coal mines and metal mines, it can prevent malfunctions such as pipeline disconnection, high-pressure fluid leakage, and loose connections. It is a key original equipment manufacturer (OEM) connection accessory for ensuring continuous and efficient operation of the entire machine in the mine.

Core technical parameters

Model: B210780000244
Main body material: Available in 20# carbon steel and 304 stainless steel.
Operating temperature: -30℃ to 160℃
Key operating parameters: Compatible with pipe diameters of DN40-DN90mm (fitting the dimensions of SY1250H high-pressure pipes), pressure rating 3000PSI (approximately 20.7MPa); flange outer diameter 140-190mm, bolt hole center circle diameter 110-160mm, number of bolt holes 4-6, hole spacing tolerance ±0.1mm, compatible with A210204000465 screw specifications; sealing surface adopts RF raised face design, sealing surface height 1.8mm, sealing accuracy ≤0.01mm; adopts forging + precision machining process, surface roughness Ra≤0.4μm, service life ≥8000 working hours, pressure resistance test requires holding pressure at 1.5 times the rated pressure for 30 minutes without leakage.
Structural Design: Utilizes a split, modular design, allowing for installation and disassembly without disassembling the entire pipeline; the sealing surface is precision-ground with built-in sealing grooves, compatible with B230101000578 O-rings, and employs a ring-shaped sealing structure; the flange body features reinforcing ribs and a rounded corner design; and pre-drilled precise positioning pin holes are provided.
Shape and Size: Features a split disc structure with a regular shape, free of burrs, cracks, and pores. After disassembly, it fits snugly to the outer diameter of the pipeline. Its dimensions precisely match the SY1250H main pump connector, high-pressure pipeline, and seals. Flange thickness is 15-22mm, and dimensions are customized according to original factory assembly standards.
Surface treatment: Carbon steel models undergo triple treatment including phosphating, high-temperature anti-rust coating, and polishing of the sealing surface; stainless steel models undergo dual treatment including mechanical polishing and passivation; the sealing surface is precision ground to improve sealing fit and withstand salt spray for ≥1000 hours.

Core functions and roles

As the “high-pressure connection and sealing core component” of the SY1250H, its core function is to connect the main pump connector with the high-pressure pipeline and valve block, achieving sealed delivery of high-pressure hydraulic oil. Simultaneously, it fixes the pipeline position, disperses fluid impact pressure, and buffers the impact of vibration on the pipeline connection points. This prevents hydraulic system pressure deficiencies, component corrosion, and equipment downtime caused by pipeline disconnection and high-pressure fluid leakage. It also reduces fatigue wear on the main pump connector, pipeline, and seals, extending the service life of core components and lowering maintenance costs. Together with the main pump connector, screws, and O-rings, it forms the overall high-pressure connection and sealing system, making it a crucial connection and sealing component for ensuring stable and efficient operation of the mining hydraulic system.

Applicable Scenarios

Widely used in the high-pressure pipeline connection parts of the SY1250H machine, it is compatible with the SSY007338266 main pump connector, A210204000465 screws, B230101000578 O-rings, and high-pressure pipelines in the pump room. It undertakes high-pressure connection, sealed delivery, and vibration buffering functions, and can also be used with high-pressure pipelines of large mining excavators of the same specifications. Suitable for 24-hour continuous heavy-duty and harsh working conditions in open-pit mines and earthmoving projects, it is an essential high-pressure connection accessory for equipment manufacturing, overhaul, after-sales maintenance, and bulk procurement. It can reduce downtime costs caused by pipeline connection failures and fluid leakage, and improve the operational stability of the hydraulic system.

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