204-2845 2042845 Piston wear-resistant ring of MH 385C L MH 374F

1. Quick Details of  seal 204-2845:

2.  204-2845  picture:

3. Service part number :

4. FAQ

Q: What materials form this complete piston seal ring assembly?
A: The primary sliding wear ring adopts beech fiber filled PTFE, equipped with HNBR elastic supporting ring to achieve reliable dynamic sealing.

Q: What colors are supplied for regular stock products?
A: The PTFE sealing ring is light off-white, and the elastic rubber ring is black. Custom color choices can be arranged for bulk purchasing orders.

Q: Can this piston seal ring fit hydraulic cylinders of all engineering machinery?
A: It is specially developed for excavator boom cylinders. It cannot match piston grooves of wheel loader tilt cylinders or grader hydraulic cylinders.

Q: Which types of construction environments suit this sealing assembly?
A: It operates steadily on highland construction and urban reconstruction sites, adapting to frequent lifting movements of excavator boom assemblies.

Q: What temperature scope can this piston seal ring withstand during continuous equipment operation?
A: It keeps stable sealing performance between -46°C ~ 136°C under long-time heavy-duty excavation work.

Q: What installation notes should maintenance operators keep in mind?
A: Do not fold or twist the flat seal ring forcibly, and clear all fine dust and metal debris inside the piston groove before assembly.

Q: What core effect does this piston seal ring bring inside the boom cylinder?
A: It separates high-pressure and low-pressure oil chambers and prevents hydraulic fluid cross leakage on two sides of the piston assembly.

Q: Will the seal ring be squeezed and deformed easily under lasting high hydraulic pressure?
A: The fiber reinforced structure improves rigidity, which greatly reduces the risk of extrusion damage under normal circulating pressure.

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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