Backup ring 121-1459 for CAT hydraulic cylinders

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Backup Ring 121-1459 for CAT Hydraulic Sealing Systems YNF16819

121-1459 backup ring for high-pressure sealing in CAT hydraulic systems.

OEM part 121-1459, designed for CAT hydraulic sealing systems
Provides anti-extrusion support for O-rings and U-cups
Made of durable PTFE, NBR, or nylon, resisting deformation
Ideal for use in hydraulic cylinders, pumps, and valves
Ensures longer service life of seals in high-pressure environments

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Backup Ring Description

YNF16819, a backup ring matching CAT part number 121-1459, is a key component used in hydraulic systems to prevent O-ring extrusion under high pressure. Installed adjacent to an O-ring in static grooves, it supports sealing under demanding conditions. Manufactured from high-strength PTFE or rubber-based compounds, this ring resists compression set and maintains shape under load. It is widely used in hydraulic cylinders, control valves, and manifold blocks of CAT excavators. A vital part for field service kits and hydraulic system rebuilds.

Backup Ring Technical Sheet

Item	Details
YNF Code	YNF16819
OEM Part Number	121-1459
Product Name	Ring-Backup
Material	PTFE / NBR / Nylon
Application Area	Hydraulic anti-extrusion sealing
Compatible With	O-rings, U-seals, and lip seals
Pressure Resistance	Up to 45 MPa
Temperature Range	-30°C to +200°C
Compatible Brands	CAT, Komatsu, Volvo, Hitachi
MOQ	100 pcs
Packaging	Sealed polybag + carton box
Origin	China
Shipping Options	Express / Air / Sea
Payment Terms	T/T, Western Union, L/C

Backup Ring Applications

Application Area	Description
Hydraulic Cylinders	Supports rod/piston seals against extrusion
Pump and Valve Housings	Prevents O-ring deformation at high loads
Hydraulic Manifolds	Protects O-rings in tight seal grooves
CAT Machine Maintenance	Frequently included in professional seal kits
B2B Distribution	Essential inventory for hydraulic repair kits

CAT Backup Ring 121-1459 Detail Display

FAQs

Related Knowledge:

Backup rings are essential in systems operating over 20 MPa, where O-rings alone may extrude.
PTFE rings offer high temperature and chemical resistance, ideal for aggressive fluids.
Correct groove sizing and pairing with the right O-ring ensures optimal performance.

Related Products:

095-1787 CAT backup ring
095-1590 O-ring seal for hydraulic fittings
Cylinder seal kits for CAT 320D
Hydraulic dust seals and guide rings

FAQs:

Q: Can backup rings be used on both sides of an O-ring?
A: Yes, in bi-directional pressure systems, use one ring on each side.
Q: Do you supply these in pre-kitted seal packages?
A: Yes, backup rings can be included in customized CAT repair kits.

Request Quote for Backup Ring 121-1459

Need a reliable backup ring for sealing support in CAT hydraulics? YNF16819 (121-1459) is manufactured to OEM precision with durable anti-extrusion properties. It’s a trusted solution for hydraulic technicians, parts distributors, and fleet managers seeking long-term sealing stability. Submit your inquiry today for factory-direct pricing and technical guidance.

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Backup Ring 121-1459 for CAT Hydraulic Sealing Systems YNF16819

Backup Ring Description

Backup Ring Technical Sheet

Backup Ring Applications

CAT Backup Ring 121-1459 Detail Display

Request Quote for Backup Ring 121-1459

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