The N4M‑Type backup ring, also called support ring, is a critical auxiliary sealing component for heavy‑duty high‑pressure hydraulic cylinder assemblies. Produced from high‑strength engineering polymer, this N4M support ring combines remarkable anti‑extrusion capability, good wear resistance and low‑friction characteristics, working cooperatively with main piston and rod seals to boost the overall pressure tolerance of sealing sets.
Under high‑pressure shock and cyclic loading, sealing elements may be forced into groove gaps, which causes extrusion damage, fluid leakage and early service failure. The N4M‑Type backup ring adopts optimized cross‑section geometry to occupy assembly gaps reasonably. It offers firm mechanical support for primary seals, restricts excessive seal deformation and protects sealing lips from gap extrusion damage during long‑term reciprocating operation.
It shows stable chemical compatibility with most mineral hydraulic fluids and maintains reliable mechanical performance across common operating temperature ranges. Matching standard seal groove dimensions, the N4M‑Type support ring enables straightforward installation and convenient spare‑part swap. It is extensively deployed in construction machinery, mining hydraulic equipment, lifting cylinders and various industrial hydraulic systems. Adopting N4M backup rings helps prolong seal service lifespan, cut unexpected breakdown risks and lower long‑run maintenance expenses for your hydraulic machinery.
Original text from: Hydraulic and Pneumatic Seals https://www.bszzseal.com/
