B210780000741 Split Flange Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

B210780000741 Split Flange Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

B210780000741 is a Sany original part number for a split flange, specifically designed for high-pressure pipeline connections in the SY1250H mining excavator. This model operates under heavy loads and high hydraulic system pressures, requiring pipeline connections to withstand high-pressure fluid impacts and severe vibrations. This places extremely high demands on the flange’s pressure resistance, sealing performance, and connection precision. It integrates high-strength forged material, precision sealing structure, convenient split-type installation, and vibration and deformation resistance as core features. It conforms to national and industry standards such as GB/T 9119-2020 “Plate Flat Welded Steel Pipe Flanges”, SAE J518C, and ISO 6162. It is compatible with the SSY007338266 main pump connector, A210204000465 screws, B230101000578 O-rings, and high-pressure pipelines in the pump room. 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: B210780000741
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 DN50-DN100mm (fitting SY1250H high-pressure pipe dimensions), pressure rating 6000PSI (approximately 41.4MPa); flange outer diameter 160-215mm, bolt hole center circle diameter 125-180mm, number of bolt holes 4-8, hole spacing tolerance ±0.1mm, compatible with A210204000465 screw specifications; sealing surface adopts RF raised face design, sealing surface height 2mm, 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: Adopts a split, open-type structure; 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 transition design; precise positioning pin holes are pre-drilled to ensure accurate connection with the main pump connector and pipelines.

Core functions and roles

As the “high-pressure connection sealing core component” of SY1250H, its core function is to connect the main pump connector with the high-pressure pipeline and valve block to realize the sealed delivery of high-pressure hydraulic oil, while fixing the pipeline position, dispersing the fluid impact pressure, and buffering the impact of vibration on the pipeline connection [3][6]. It can avoid the failures such as insufficient hydraulic system pressure, component corrosion, and equipment shutdown caused by pipeline disconnection and high-pressure fluid leakage, reduce the fatigue wear of the main pump connector, pipeline and seals, extend the service life of core components, reduce operation and maintenance costs, and form a high-pressure connection sealing system for the whole machine together with the main pump connector, screws and O-rings. It is a key connection sealing component to ensure the 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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