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Seal kits and seals
This section covers hydraulic sealing: O-rings, rod seals, wiper seals, piston seals, back-up rings, guide rings, flat seals, copper and aluminium washers, quad rings and complete seal kits. All seals are supplied as genuine parts; material and hardness follow the original manufacturer standard. A seal is matched by the groove dimensions and the original profile code, not only by the rod or bore diameter, so the old part number or a photo of the cross-section is the fastest way to identify it. Complete kits contain every seal needed to reseal one cylinder head or valve. Send the machine model, cylinder part number or a photo of the old seal and we reply within 24 hours with the exact part.
Showing 625–640 of 9831 results
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Back-up rings Hansa Flex BU 9
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Back-up rings Hansa Flex MBK 10 14
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Back-up rings Hansa Flex MBK 100 105
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Back-up rings Hansa Flex MBK 100 110
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Back-up rings Hansa Flex MBK 105 110
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Back-up rings Hansa Flex MBK 105 115
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Back-up rings Hansa Flex MBK 11 15
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Back-up rings Hansa Flex MBK 110 115
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Back-up rings Hansa Flex MBK 110 120
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Back-up rings Hansa Flex MBK 113 118
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Back-up rings Hansa Flex MBK 115 120
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Back-up rings Hansa Flex MBK 115 125
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Back-up rings Hansa Flex MBK 12 16
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Back-up rings Hansa Flex MBK 120 125
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Back-up rings Hansa Flex MBK 120 130
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Back-up rings Hansa Flex MBK 125 130
Frequently Asked Questions
Do you supply genuine parts or Chinese equivalents?
Genuine parts are our main business. If you need a lower-cost option, we can also look for a Chinese-made equivalent with the same mounting dimensions and ratings.
What is the lead time?
It depends on the supplier. If the factory has stock or produces in China, we ship quickly. A factory order that must be manufactured or shipped from abroad takes longer. We confirm the exact date in your quote.
How do I place an order?
Send the part number, a photo of the nameplate, or the machine model. We confirm availability and price within 24 hours.
What are the payment and shipping terms?
EXW by default. 20-50% prepayment, balance before shipment. We can work with your freight forwarder.
What sealing products do you supply?
O-rings, rod seals, wiper seals, piston seals, back-up rings, guide rings, flat seals and seal kits.
Are the seals genuine?
Yes, all seals are genuine parts. Material and hardness follow the original manufacturer standard.
Seal type comparison
| Seal type | Cross-section | Pressure class | Typical applications |
|---|---|---|---|
| O-ring | Circular | Low to medium | Static sealing, light dynamic duty |
| Quad ring | Four-lobed | Low to medium | Low-pressure sealing, less tendency to roll |
| U-cup | U-shaped | Medium to high | Rod and piston sealing in cylinders |
| V-ring (chevron) | V stack | High | Heavy-duty cylinders |
| Wiper / scraper | Lip | - | Removing dirt and water from the rod |
Material data follows published O-ring manufacturer catalogues (Parker, Trelleborg). Pressure class and efficiency are relative comparisons between types, not rated values for a specific part - always confirm against the datasheet of the exact model.

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