B210780000693 Split Flange Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

B210780000693 Split Flange Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

B210780000693 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, a precision sealing structure, convenient split-type installation, and vibration-resistant and deformation-resistant core characteristics. Suitable for open-pit coal mines and metal mines, it prevents pipeline disconnection, high-pressure fluid leakage, and loose connections, making it a crucial original factory connection component for ensuring continuous and efficient operation of the entire machine in the mine.

Core technical parameters

Model: B210780000693
Main body material: Available in 20# carbon steel and 304 stainless steel.
Operating temperature: -30℃ to 160℃, suitable for open-pit mines with large temperature differences between day and night and high-temperature working environments of hydraulic systems.
Key operating parameters: Compatible pipe diameter DN50-DN110mm (fits SY1250H high-pressure pipe size), pressure rating 6000PSI (approximately 41.4MPa); diameter 165-220mm, bolt hole center circle diameter 130-185mm, number of bolt holes 6-8, hole spacing tolerance ±0.1mm; 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: 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: It features a split disc structure with a regular shape, free of burrs, cracks, and pores. After disassembly, it fits snugly against the outer diameter of the pipeline. Its dimensions are precisely matched to the SY1250H main pump connector, high-pressure pipeline, and seals. The flange thickness is 18-25mm, and its dimensions are customized according to the original factory assembly standards, with precise mounting hole positions.
Surface treatment: The carbon steel version adopts a triple treatment of phosphating + high temperature anti-rust coating + sealing surface polishing; the stainless steel version adopts a double treatment of mechanical polishing + passivation; the sealing surface is precision ground to improve the sealing fit and the salt spray resistance is ≥1000 hours.

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 . 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, A210204000354 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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