Choosing the right buffer seal can make or break your hydraulic system’s performance. That’s why KDAS seals are a top choice in 2025.
KDAS hydraulic seals are compact sealing units designed to absorb pressure spikes in high-load systems. They help prevent leakage, extend service life, and reduce downtime—especially in high-pressure cylinders.
Still unsure if KDAS is right for you? Let’s explore how it compares, how to choose, and how it performs under pressure.
What makes KDAS seals ideal for high-pressure hydraulic systems?
KDAS seals are specifically engineered for shock absorption in tough environments.
They consist of multiple sealing elements—including guide rings and back-up rings—which provide radial stability, high extrusion resistance, and reduced wear under fluctuating pressure conditions.
KDAS seals are frequently used in construction equipment, mobile hydraulics, and forging machines. They outperform standard U-cup seals in terms of load capacity and resilience.
| 특징 | KDAS 씰 | Standard U-Cup |
|---|---|---|
| 충격 흡수 | 훌륭한 | 보통의 |
| Extrusion Resistance | 높은 | 낮은 |
| Installation Space | Compact | Slim |
| Ideal Pressure Range | ≤ 40MPa | ≤ 25MPa (최대) |
If your application involves sudden pressure surges or heavy-duty cycles, a KDAS compact seal will outperform traditional buffer solutions.
How do you select the right KDAS seal for your cylinder?
Choosing the correct KDAS seal requires understanding your cylinder’s dimensions, stroke pattern, and fluid compatibility.
You’ll need to verify:
- Rod diameter and groove width
- Working temperature and pressure range
- Fluid type (e.g., mineral oil, HFA/HFB)
Most manufacturers, including us at Hengoseal, offer custom sizing. Our custom rubber seal service allows you to match exact OEM standards or design your own compact set.
Not sure about measurements? Check out our article on how to measure hydraulic seals accurately.
What’s the difference between KDAS and UN piston seals?
UN piston seals are widely used in double-acting cylinders, while KDAS seals specialize in buffering and guide functions.
- 케이다스 = Buffer seal + guide ring + wear ring (multi-function)
- 유엔 = Single-piece piston seal (single function)
If you're building or maintaining a high-performance hydraulic system, you may need both. You can view our UN hydraulic seals alongside KDAS for a full sealing stack.
Where are KDAS seals commonly used?
KDAS seals are essential in any system that faces impact loading or frequent reversals.
- Excavator hydraulic cylinders
- Steel forging presses
- Mobile cranes
- 사출성형기
Their compact design reduces installation space while boosting resilience in highly dynamic environments.
In comparison to standard buffer rings, KDAS systems handle both the guiding and sealing function. This reduces part count, assembly errors, and long-term maintenance cost.
Are there alternatives to KDAS seals?
Yes, depending on your system’s needs, you may also consider:
| Alternative | When to Use |
|---|---|
| UHS/USH Seals | If cost is a key constraint |
| FA Guide Rings | If guidance is your main concern |
| V-type Combi Seals | For ultra-heavy-duty pressure absorption |
Explore other options in our hydraulic seal product library.
결론
KDAS seals are the smart solution for anyone maintaining high-pressure hydraulic systems. They combine buffer, guide, and sealing into one compact, reliable package.
Discover your perfect seal today
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