The Power of Hydraulic Cylinder Seals: A Comprehensive Guide

By Completely Blogger | April 21, 2023
hydraulic cylinder seals


The Essential Guide to Hydraulic Cylinder Seals: Types, Materials, and Maintenance

Hydraulic cylinder seals are a big deal in the hydraulic industry, a hydraulic director once said this and he was right as without these there would be no hydraulics that work efficiently. These small, yet essential components make sure that the machinery is efficient and smooth in the day to day operation of every hydraulic system. This article will look at the world of hydraulic seals digging into the different types, materials, and the importance of maintenance and repair. But first, let’s get to know Completely Hydraulic, in this arena as they are the go-to experts for all your hydraulic needs.

Completely Hydraulic: Your One-Stop Shop for Hydraulic Services and Solutions

Completely Hydraulic is a leading provider of hydraulic repairs, services, parts, equipment, and accessories for various industries. They offer maintenance contracts, hose repairs, and a 24-hour, 365-day call-out service to local areas of London, Kent, Essex, and Heathrow and their environs where their walk-in trade depots are situated. As specialists with expertise in bespoke projects, they cater to clients all over the UK.

In the world of hydraulics, seals are indispensable. Here are some common hydraulic seal types you may come across:

    1. Hydraulic piston seals – used for sealing the piston to the cylinder bore
    2. Hydraulic rod seals – ensure the rod remains sealed to the cylinder
    3. Hydraulic jack seals – important in maintaining pressure in hydraulic jacks
    4. Hydraulic pump shaft seals – This keeps the hydraulic fluid from leaking out of the pump
    5. Hydraulic shaft seals – prevent fluid leakage between rotating and stationary components
    6. Hydraulic gaskets – This creates a tight seal between mating surfaces in hydraulic assemblies
    7. Hydraulic O-rings – These round, doughnut-shaped seals provide a tight seal in both static and dynamic applications, preventing leaks between mating surfaces.


      Hydraulic gaskets


  • Hydraulic Wiper Seals – Also known as scraper seals, they help keep contaminants like dirt, dust, and moisture out of the hydraulic system, protecting the rod and cylinder from damage.
  • Hydraulic Buffer Seals – These seals are used together with rod seals to absorb any pressure spikes that may occur in the hydraulic system, reducing the chances of seal failure.
  • Hydraulic Vee Seals – Vee seals, or V-rings, are designed to provide a positive seal under low-pressure conditions and can adapt to varying pressure levels and operating speeds.
  • Hydraulic Wear Rings – While not traditional seals, wear rings are essential components in hydraulic cylinders, helping to guide the piston and rod, reducing metal-to-metal contact, and preventing damage to the cylinder components.
  • Hydraulic Back-up Rings – These are used as a support for O-rings and other sealing elements, preventing extrusion and seal damage in high-pressure applications.


Hydraulic seals o rings

Materials Matter: Choosing the Right Hydraulic Seal Materials

Many would not think that the choice of hydraulic seal materials is a big thing but it is, especially if you want to keep the machinery moving and for it to do its job for a long time. The most common materials include:

  • Polyurethane: Offers excellent abrasion resistance, high tensile strength, and superior resistance to hydraulic oils and fuels.
  • Nitrile rubber (NBR): A versatile material that is compatible with various hydraulic fluids and offers good resistance to abrasion and tearing.
  • Fluorocarbon (FKM/Viton): Known for its resistance to high temperatures and aggressive chemicals, making it ideal for demanding applications.
  • Ethylene Propylene Diene Monomer (EPDM): Exhibits excellent resistance to weather, ozone, and UV radiation, making it suitable for outdoor applications.

Discover more about the use of hydraulic seals and the seals for hydraulic equipment on the website.


Hydraulic seals

Maintenance and Repair: Ensuring Peak Performance of Your Hydraulic Equipment

Your machines need regular inspection or preventative maintenance, and some kind of repair protocol should your hydraulic equipment experience issues. Every business dreads the dreaded word known as ‘machinery downtime’ and just wants to focus on the extension of the life of the machine so that it can successfully do its job. Here are some common services offered by Completely Hydraulic:

  • Hydraulic cylinder rebuild: A comprehensive service that involves disassembling, inspecting, repairing, and reassembling the hydraulic cylinder.
  • Hydraulic o-ring replacement: Ensuring the optimal performance of rubber o-ring seals by replacing worn or damaged o-rings.
  • Hydraulic oil seal repair: Identifying and fixing any issues with your hydraulic oil seals to prevent fluid leakage.
  • Hydraulic jack repair: Comprehensive hydraulic jack repair services in Essex, Kent, and London areas.


HYdraulics For Skyscrapers Repair Service



Q1: What are hydraulic seals used for?

A1: Hydraulic seals are essential components in hydraulic systems, used to prevent fluid leakage, maintain pressure, and ensure smooth operation between moving parts.

Q2: What are the most common types of hydraulic seals?

A2: Some common types of hydraulic seals include piston seals, rod seals, O-rings, wiper seals, buffer seals, and gaskets.

Q3: How do I choose the right hydraulic seal material for my application?

A3: The choice of hydraulic seal material depends on things like temperature, pressure, compatibility with hydraulic fluids, and the operating environment. Common materials include polyurethane, nitrile rubber (NBR), fluorocarbon (FKM/Viton), and ethylene propylene diene monomer (EPDM).

Q4: How often should hydraulic seals be replaced?

A4: Hydraulic seal replacement frequency depends on factors like usage, operating conditions, and the specific type of seal. Regular inspection and maintenance can help discover worn or damaged seals that need replacement.

Q5: How do I know if my hydraulic seals are failing?

A5: Hydraulic seal failure signs may include fluid leaks, reduced system pressure, excessive wear on cylinder components, or a decrease in equipment performance. If you notice any of these signs, you must address the issue promptly to avoid further damage.

Q6: Can I use the same hydraulic seal for different applications?

A6: While some hydraulic seals may work in multiple applications, you must choose the right seal type and material for each specific application to make sure you get the best out of your machinery.

Q7: Where can I find reliable hydraulic seals suppliers and manufacturers?

A7: Completely Hydraulic collaborates with leading hydraulic seals suppliers and manufacturers to provide high-quality products and services for various industries. Visit our home page to learn more about our offerings.

System install Maintenance Service

In Conclusion

The world of hydraulic cylinder seals is sometimes complicated, but with the help of experts like Completely Hydraulic, you can discover an easy solution in this industry. When you understand the different hydraulic seal types, materials, and the importance of regular maintenance and repair, you can protect your investment and keep your hydraulic equipment running at its optimum performance.


Why Choose Us?

We work with clients and companies big and small across a wide range of sectors from construction and static plant to service, maintenance and emergency callouts. We really do specialise in keeping hydraulic machinery moving.

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Head Office Unit 26, Mead Park Industrial Estate, Riverway, Harlow, Essex. CM20 2SE UK


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