Seal kits

A seal kit is the complete set of seals for one cylinder in a single package: rod seal, wiper, piston seal, guide and back-up rings. It saves ordering individual parts and eliminates size mistakes. Below are 94 Hansa Flex HK series kits.

Complete size range — 94

The table lists 94 sizes. Start typing a part number or size to filter the list.

94
Part number
HK GKG 2S 0040 025
HK GKG 2S 0050 030
HK GKG 2S 0060 030
HK GKG 2S 0060 035
HK GKG 2S 0070 040
HK GKG 2S 0080 040
HK GKG 2S 0100 050
HK GKG T 020 030
HK GKG T 025 035
HK GKG 0030 016
HK GKG T 030 040
HK GKG 0032 020
HK GKG 0035 020
HK GKG 0035 022
HK GKG T 035 045
HK GKG 0040 020
HK GKG 0040 022
HK GKG 0040 025
HK GKG T 040 050
HK GKG 0045 022
HK GKG 0045 025
HK GKG T 045 055
HK GKG 0050 020
HK GKG 0050 025
HK GKG 0050 030
HK GKG 0050 035
HK GKG T 050 060
HK GKG 0055 025
HK GKG 0055 030
HK GKG 0055 035
HK GKG 0060 025
HK GKG 0060 030
HK GKG 0060 035
HK GKG 0060 040
HK GKG T 060 070
HK GKG 0063 030
HK GKG 0063 035
HK GKG 0063 040
HK GKG 0065 030
HK GKG 0065 035
HK GKG 0065 040
HK GKG 0065 045
HK GKG 0070 025
HK GKG 0070 030
HK GKG 0070 035
HK GKG 0070 040
HK GKG 0070 045
HK GKG 0070 050
HK GKG T 070 000
HK GKG 0075 030
HK GKG 0075 035
HK GKG 0075 040
HK GKG 0075 045
HK GKG 0080 030
HK GKG 0080 035
HK GKG 0080 040
HK GKG 0080 045
HK GKG 0080 050
HK GKG 0080 055
HK GKG 0080 060
HK GKG T 080 000
HK GKG 0085 035
HK GKG 0085 040
HK GKG 0085 050
HK GKG 0090 040
HK GKG 0090 045
HK GKG 0090 050
HK GKG 0090 060
HK GKG 0100 040
HK GKG 0100 045
HK GKG 0100 050
HK GKG 0100 055
HK GKG 0100 060
HK GKG 0100 070
HK GKG T 100 000
HK GKG 0110 045
HK GKG 0110 050
HK GKG 0110 060
HK GKG 0110 070
HK GKG 0120 050
HK GKG 0120 060
HK GKG 0120 070
HK GKG 0125 060
HK GKG 0125 070
HK KIT HFRT 125
HK GKG 0140 070
HK GKG 0140 080
HK DSF 150 100
HK GKG 0150 070
HK GKG 0150 080
HK GKG 0160 080
HK GKG 0160 090
HK KIT HFRT 230
HK KIT HFRT 340

How to select the size

A kit is selected by cylinder model, not by individual dimensions. If the model is unknown, measure the rod, gland and piston groove and build the set manually.

Check the material: kits for different duty may contain NBR or PU.

Materials

The material is chosen by medium and temperature, not by price:

  • NBR — the standard for mineral oil, −30…+100 °C. Most common and least expensive.
  • FKM (Viton) — up to +200 °C, aggressive media, brake fluid. Three to five times the price of NBR.
  • PU (polyurethane) — high pressure and abrasion, but not above +80 °C.
  • PTFE — chemicals, very low friction, but poor under compression without support.
  • EPDM — water, steam, glycol-based brake fluid. Not compatible with oil.

Common fitting mistakes

Three mistakes that make a new seal leak within a day:

  1. Damaged lip during fitting. The seal is pushed over threads or splines without a sleeve — the lip is cut and you cannot see it.
  2. Measuring a worn part. The old ring has lost its shape, so the new size does not seat in the groove.
  3. No back-up ring. Above 160 bar the seal extrudes into the gap.

Frequently asked questions

What is included in a seal kit?
Typically: rod seal, wiper, piston seal, guide rings and back-up rings. The exact contents depend on the model.

Is a kit more expensive than individual parts?
Usually not — and it removes the risk of ordering the wrong sizes.

Can you build a kit for a non-standard cylinder?
Yes. Send the rod, gland and groove dimensions and we will match the parts individually.

Complete seal kits: every seal, O-ring and back-up ring needed to reseal one hydraulic cylinder or valve, boxed per unit. Genuine kits with the original material and hardness. Send the cylinder or valve model and we confirm which kit fits within 24 hours. Kits save the time of ordering individual seals and reduce the risk of missing a part.

Showing 1–16 of 94 results

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 is included in a seal kit?

All seals and O-rings needed to reseal one cylinder or valve, boxed per unit.

Are seal kits genuine?

Yes, genuine kits. The material and hardness follow the original manufacturer standard.

Need a price or an equivalent?

Send the part number or a photo — we will match it and reply within 24 hours.

Send request
WhatsApp Telegram MAX Call

All trademarks are the property of their respective owners. YDC Trading is an independent supplier and is not an authorized distributor unless otherwise stated.