Key specifications
- Diameter range
- Ø 9.21 – 31.42 mm
- Standard sizes
- 50+
Selected size:
Product Description
Small-diameter NBR and FKM U-cups used in joysticks and pilot control valves. 50+ standard sizes available. For a quote, please send the machine make/model, cylinder or part number and quantity.
Technical Specifications
| Diameter range | Ø 9.21 – 31.42 mm |
|---|---|
| Standard sizes | 50+ |
Size Table
This product is available in 36 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 |
|---|---|---|---|
| 0 – 10 | 14.01 | 2.27 | 1 |
| 10 – 20 | 14 – 34.8 | 1.4 – 7 | 24 |
| 20 – 30 | 31.4 – 44 | 2 – 7 | 9 |
| 30 – 50 | 37.67 | 2.8 – 4.15 | 2 |
🔎 Size finder
Applications
- Excavator, backhoe and loader cylinders
- Hydraulic breakers
- Transmissions, brakes and control valves
- Accumulators and gas-charged systems
Information Needed for a Quote
- Machine make and model, and the cylinder or unit position
- Part number (if available)
- Seal dimensions (ID × OD × height)
- Quantity
Selection and Usage Notes
- Replacing all seals as a kit during cylinder repair avoids a second teardown.
- Breaker gas seals work with high-pressure nitrogen; the right material (HNBR, FKM) must be chosen.
Frequently Asked Questions
Can you supply repair kits by machine model?
Yes. Just send the machine make and model and the cylinder position (boom, arm, bucket, etc.).
What if I have no original part number?
Send the dimensions or photos of the removed seals and we will identify an equivalent.
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Sistemay Endüstriyel supplies Construction Machinery Seals products across Türkiye and abroad. For product selection, sizes, quantities and pricing, fill in the quote form or write to info@sistemay.com.