125-1286 1251286 190.05 mm outer diameter stick cylinder piston sealing ring of 349E 345B 374D L 345C 345D

1. Quick Details of  seal 125-1286:

2.  125-1286  picture:

3. Service part number :

4. FAQ

Q: What materials make up this set of piston seal rings?
A: The main sliding ring adopts poplar fiber filled PTFE, paired with elastic NBR backing ring to realize dynamic sealing function.

Q: What colors can I get for standard stocked goods?
A: The wear-resistant outer ring is off-white, and the inner elastic ring is black. Custom color schemes can be negotiated for bulk orders.

Q: Is this piston seal ring suitable for all engineering machinery cylinders?
A: It is specially designed for excavator hydraulic cylinders. It cannot match the piston grooves of wheel loaders or road graders.

Q: What operating environments are suitable for this sealing assembly?
A: It works steadily in river dredging and infrastructure projects, adapting to frequent reciprocating movement inside hydraulic cylinders.

Q: What temperature range can this piston seal ring cope with continuously?
A: It maintains stable sealing performance between -52°C ~ 132°C under long-duration heavy-load excavation operations.

Q: What installation tips should maintenance technicians follow?
A: Avoid bending the flat seal ring violently during assembly, and clear sediment inside the piston groove completely in advance.

Q: What core function does this piston seal ring perform inside the cylinder?
A: It separates high-pressure and low-pressure oil chambers inside the cylinder and prevents hydraulic fluid from flowing across both sides of the piston.

Q: What engineering projects commonly require replacement of this piston seal ring?
A: It serves routine maintenance of hydraulic cylinder piston sealing assemblies on medium crawler excavators, widely used in urban infrastructure, highway subgrade construction, small quarry loading and residential foundation excavation projects.

5. Exhibition and Wearhous

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