Key specifications
- Diameter range
- Ø 16 – 200 mm
- Standard sizes
- 50+
Selected size:
Product Description
FKM piston U-cup for hydraulic and pneumatic cylinders at high temperature. 50+ standard sizes available. For a quote, please send the size (ID × OD × height), material and quantity.
Technical Specifications
| Diameter range | Ø 16 – 200 mm |
|---|---|
| Standard sizes | 50+ |
Size Table
This product is available in 57 standard sizes. The table shows how they are distributed; use the size finder to see every size.
| Inner diameter d (mm) – range | Outer diameter D (mm) | Height H (mm) | Sizes |
|---|---|---|---|
| 10 – 20 | 16 – 25 | 8 | 5 |
| 20 – 30 | 28 – 35 | 8 – 10 | 4 |
| 30 – 50 | 40 – 60 | 10 – 14 | 5 |
| 50 – 80 | 63 – 90 | 14 | 7 |
| 80 – 120 | 95 – 135 | 14 – 18 | 16 |
| 120 – 200 | 135 – 200 | 14 – 18 | 20 |
🔎 Size finder
Applications
- Hydraulic cylinder pistons (double and single acting)
- Presses, injection moulding and metalworking machines
- Construction and agricultural machinery cylinders
- Pneumatic cylinder pistons
Information Needed for a Quote
- Cylinder bore, groove diameter and groove width (mm)
- Seal type or the code of the existing seal
- Operating pressure and temperature
- Fluid (hydraulic oil, water-glycol, air)
- Quantity
Selection and Usage Notes
- For double-acting cylinders, PTFE slipper seals give low friction; compact seal sets suit heavy-duty work.
- Always use piston seals together with suitable guide (wear) rings.
- Check the cylinder tube for scoring and corrosion before fitting a new seal.
Frequently Asked Questions
How do I specify a piston seal size?
By cylinder bore, groove diameter and groove width. In our tables these appear in the inner diameter, outer diameter and height columns.
What if the code on the old seal is unreadable?
Send us the groove dimensions and the cylinder operating pressure; we will identify a suitable seal.
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