216-0008 2160008 128.4 mm inner diameter U-shaped cup seal of 374D L 345C 312D 365B

1. Quick Details of  seal 216-0008:

2. 216-0008 picture:

3. Service part number :

 
4. FAQ

Q: What typical working conditions suit this hydraulic piston rod seal?
A: It works well in freight yards and sand pits, enduring frequent steering movement, dust and muddy ground environment.

Q: How is the temperature adaptability of this sealing assembly?
A: It operates reliably between -76°C and 370°C and maintains stable sealing effect under continuous heavy-load steering operation.

Q: What inspection work is recommended before installing this piston rod seal?
A: You need to check whether the piston rod surface has scratches, which will accelerate abrasion of the newly mounted seal.

Q: What common hydraulic malfunction can this piston rod seal effectively prevent?
A: It can reduce external hydraulic oil leakage and avoid permanent extrusion deformation caused by frequent steering pressure changes.

Q: What unique advantages does oak fiber reinforced HNBR have compared with ordinary rubber?
A: It delivers outstanding wear resistance under swing motion and great elastic recovery, extending service life during repeated steering actions.

Q: What maximum instantaneous hydraulic pressure can the three-layer composite sealing combination withstand without extrusion failure of the sealing lip?
A: This matched multi-layer sealing structure can resist instantaneous hydraulic pressure up to 7.8MPa, buffer sharp pressure surges generated by frequent boom lifting and lowering, and eliminate external hydraulic oil leakage along the piston rod surface.

Q: What mainstream construction and farmland engineering scenarios rely on this rod seal kit for regular hydraulic cylinder overhaul maintenance?
A: It is designed for daily maintenance of boom cylinder piston rod assemblies on backhoe loaders, widely applied in rural farmland trenching, municipal pipeline excavation, small foundation backfilling and rural road repair projects.

Q: What core construction projects require this rod seal kit for routine hydraulic cylinder maintenance?
A: It is developed for daily overhaul of bucket cylinder piston rod assemblies on medium crawler excavators, widely applied in residential foundation excavation, small river dredging, landscape earth shaping and rural road expansion projects.

Q: How does the service lifespan of carbon nanotube modified PU rod seals compare with standard unmodified polyurethane rod seals?
A: The carbon nanotube doping formula greatly upgrades surface wear resistance and high-pressure stability. Under daily full-load digging operation, its service cycle reaches 2.7 times that of ordinary single PU piston rod seals.

Q: How well can this sealing set block construction mud, rock dust and suspended hot hydraulic oil mist in muddy outdoor excavation working conditions?
A: The outer NBR dust wiper intercepts large sediment particles, while the inner PU main seal isolates hot oil mist inside the cylinder, and wear-resistant PTFE rings avoid scratch damage from fine grit mixed in hydraulic oil.

Q: What practical efficiency benefits can on-site excavator maintenance staff gain from using this fully pre-matched rod seal kit?
A: All supporting sealing accessories required for rod overhaul are pre-assembled into one complete set without separate procurement. Technicians do not need to carry scattered loose seals or repeatedly measure rod groove dimensions on site, greatly shortening cylinder repair time.

5. Exhibition and Wearhous

Oil seals,Hydraulic Seals, Cylinders Seal Kits, And More