Rod Seals

Rod seals are dynamic sealing elements fitted at the end of the hydraulic cylinder, around the rod; they ensure the hydraulic fluid remains sealed and allow the rod to move axially, whilst maintaining as little friction as possible. 

If they are not of good quality, oil may leak, the cylinder will lose efficiency and costly repairs may be required. In the Hydraulic Seals Store catalogue, you will find rod seals made from polyurethane, NBR rubber and other technical materials, available from stock with fast delivery in Romania.

What role do rod seals play?

They prevent hydraulic fluid leaks

The rod of a hydraulic cylinder moves constantly under pressure, and the rod seal is what seals the gap between the rod and the cylinder head. Without it, oil would escape from the system with every stroke. It is one of the most heavily used components in the entire assembly, precisely because it is constantly operating under conditions of friction and pressure.

It ensures the stable operation of the moving rod

As well as sealing, the rod seal also helps to guide the rod, reducing vibrations and premature wear. Whether the rod is moving or stationary, the seal maintains close and even contact. If you’re looking for a complete sealing solution, it’s worth taking a look at our range of piston seals or guide strips.

Selection criteria

There is no one-size-fits-all seal — the choice depends on several factors: the rod diameter, maximum working pressure, fluid temperature and the type of hydraulic oil used. The seal’s profile must fit exactly into the seat in the cylinder head, otherwise the seal will not be complete. For very high-pressure applications, Vee Packing seals are a worthwhile alternative, offering adjustable sealing in stages.

Prices for rod seals

Prices vary depending on size, material and profile. NBR rubber seals are the most affordable and are suitable for most standard applications. Those made from polyurethane or FKM are slightly more expensive, but last longer in harsh conditions — in the long run, the investment is worth it. At Hydraulic Seals Store, you’ll always find products in stock, at fair prices, with fast delivery anywhere in Romania.

The benefits of buying rod seals from the Hydraulic Seals Store

At Hydraulic Seals Store, you’ll find everything you need in one place — from standard hydraulic seals to specialised solutions for more demanding applications. We maintain a permanent stock, delivery is fast, and our prices are tailored to suit both individual technicians and businesses placing regular orders. If you’re not sure which product is best suited to your needs, our team will be happy to help.

Frequently Asked Questions 

What are rod seals? 

Rod seals are sealing components fitted to the end of a hydraulic cylinder. They prevent hydraulic fluid from leaking out and help ensure the rod operates correctly whilst in motion.

How do I choose the right rod seals? 

Choose the right seal by taking into account the rod diameter, maximum working pressure, fluid temperature and compatibility with the hydraulic oil used. The seal profile must match the seat in the cylinder head.

What is the role of rod seals in cylinders? 

Rod seals prevent hydraulic fluid from leaking out of the system and stabilise the movement of the rod. They function as seals under conditions of dynamic friction and at varying pressures.

What materials are suitable for rod seals? 

Common materials include polyurethane (for high pressure and wear resistance) and NBR rubber (for standard applications). FKM is recommended for high temperatures or aggressive fluids.