B210780000880 Baffle type connector Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

B210780000880 Baffle type connector Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

As a core hydraulic diaphragm-type connector accessory from Sany, the B210780000880 diaphragm-type connector adheres to the through-plate sealing connection standard for oil return systems. Utilizing a diaphragm isolation and sealing design, it can be firmly fixed to the equipment wall, ensuring a smooth, leak-free connection without oil splashing or air bubbles, preventing pump cavitation and air intake. It is compatible with the entire range of Sany excavators, including the SY55 and SY225 models, and tank trucks, matching original factory installation dimensions for direct replacement, improving maintenance efficiency and reducing equipment downtime.
The B210780000880 diaphragm type joint uses high-specification materials and precision machining technology. The main body is made of high-quality carbon steel with a galvanized anti-rust treatment. It consists of the joint body, fixing nut, and sealing gasket. The diaphragm structure uses non-magnetic material for auxiliary sealing, which has excellent sealing performance and can achieve a near-zero leakage sealing effect. It is resistant to pulse and wear aging, and is suitable for the complex and harsh operating environment of engineering machinery. It extends service life, reduces maintenance costs, and meets SANY original factory standards.

Core technical parameters:

– Part number: B210780000880
– Connector type: partition type (through-plate sealing type), including connector body, retaining nut, and sealing gasket assembly.
– Compatible models: Sany SY55/SY60 and other full series excavators and Sany tank trucks
– Working pressure: ≤35MPa, adapted for low-pressure return, protects shaft seal, pressure test pressure ≥50MPa
– Thread parameters: One end is a G3/4 imperial cylindrical pipe thread (14 threads per inch, pitch 1.814mm), and the other end is an M33 metric thread (pitch 3.5mm), conforming to thread standards.
– Material Specifications: Main body is made of high-quality carbon steel with galvanized rust-proof surface; partition is made of non-magnetic stainless steel; sealing gasket is made of nitrile rubber.
– Sealing standard: Metal + rubber double seal, sealing pressure ≥40MPa, suitable for -40℃~120℃, oil-resistant and anti-aging, leakage rate less than 1×10⁻⁹ mbar·L/s
– Installation method: Threaded + partition fixing connection, precisely matches the original interface, wrench compatible, easy to install, and can be firmly fixed to the equipment wall.
– Execution Standard: Complies with GB/T 3683-2011 and Sany original factory specifications, has passed pressure and sealing tests, and is suitable for oil return through-plate sealing scenarios.

The B210780000880 diaphragm-type connector conforms to SANY’s original standards, with optimized diaphragm sealing structure and thread precision. It can penetrate the equipment wall to achieve a fixed seal, ensuring a firm and secure connection. It precisely connects to the drain oil pipeline, guiding leaked oil to flow back smoothly and assisting in heat dissipation, reducing system temperature rise, preventing shaft seal damage and housing cracking, and is oil-resistant and pulse-resistant. It is suitable for high-frequency operation, protecting the stability of the hydraulic system and improving equipment efficiency and lifespan.
We specialize in Sany construction machinery parts. Our B210780000880 partition type connector undergoes rigorous quality inspection, meets original factory standards, has strong compatibility, supports bulk customization and in-stock items, and provides comprehensive after-sales service to ensure the smooth operation of Sany equipment.

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