Our extensive range of Piston Seals is tailored to ensure dependable sealing for hydraulic pistons across various applications. These seals are crafted for durability and efficiency, preventing fluid leakage and maintaining optimal system pressure. Browse through our selection to find the right Piston Seal to suit your hydraulic system requirements.

High quality replacement piston seals:

13 products

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from 52 reviews
Exactly as described but without the rip off

Exactly as described but without the rip off prices

Anonymous
14mm x 4mm (22mm OD) Nitrile O-Rings
Good selection at a reasonable price.

I needed an o-ring for my ebike's hydraulic bakes so I ordered a few packs either side of the size i thought i needed. I also noticed that they did a pack of o-rings for hozelock connectors so I ordered a pack as some of mine were leaking.
I haven't had time to try the bike o-ring yet but I have replaced some of my old brittle water butt connector o-rings and they are as new again.
They have a good selection of seals at a reasonable price, my only gripe is that the website is awkward to use. If you add an item to your basket, you can't go back to where you were browsing, you have start from scratch.

Mr Vincent Paul Valvona
4mm x 1.5mm (7mm OD) Nitrile O-Rings
Excellent service went above what may have been expected on sourcing product

Excellent service went above what may have been expected on sourcing product.

Anonymous
48mm x 3mm (54mm OD) Nitrile O-Rings
Excellent service very fast delivery

Excellent service very fast delivery thanks

Alan Scrimgeour
33mm x 2.5mm (38mm OD) Nitrile O-Rings
They're O rings :-)

Easy to use website, easy to order, well packed and fast delivery. What else can you ask for. Excellent

Anonymous
EPDM O-Rings Suitable for Hozelock or Gardena
Jack back in action.

Exactly what I needed to fix leaky pump shaft on my 3 ton trolley jack. With new O-ring fitted, there is no leak and the jack no longer sinks under load. Didn't really need the full minimum purchase of 20 O-rings but at least I can fix the jack another 19 times!

Ken Clayson
16mm x 3.5mm (23mm OD) Nitrile O-Rings
Great quality FKM O-rings

Fast delivery and very good quality Viton/FKM O-rings. Material feels strong and high temperature resistant. Unfortunately I ordered the wrong size for my Audi coolant pipe repair, but the product itself is excellent. Would buy again.

Milan Sagat
14mm x 3mm (20mm OD) FKM (Viton™) O-Rings
Great service product bang

Great service product bang on

Anonymous
9mm x 2mm (13mm OD) Nitrile O-Rings
All good all round

All good all round, thank you.

Trevor Miners
3mm x 2mm (7mm OD) Nitrile O-Rings
quick delivery and exactly as

quick delivery and exactly as described

Keiron Casey
16mm x 3mm (22mm OD) Nitrile O-Rings
Great

Great service

Keith Rayner
22mm x 2.5mm (27mm OD) Nitrile O-Rings
Exactly as described

Exactly as described.

Anonymous
4mm x 2mm (8mm OD) Nitrile O-Rings
Quick efficient

Quick efficient service

Anonymous
35mm x 45mm x 6mm U-Cup Hydraulic Seal
perfect !!! + ++

perfect !!! + ++.+++. ++++ :-)

Pascal Catinat
44mm x 5mm (54mm OD) Nitrile O-Rings
Seals

Worked great

Anonymous
35mm x 45mm x 6mm U-Cup Hydraulic Seal

What are Piston Seals?

Piston Seals are specialised seals used in hydraulic and pneumatic cylinders to create a barrier between the piston and the cylinder wall. These seals help maintain pressure on one side of the piston, enabling the cylinder to generate motion and force efficiently. Piston Seals are vital for the effective operation of any hydraulic or pneumatic system.

How do Piston Seals work?

Piston Seals work by containing the pressure within the cylinder, creating a tight seal that prevents fluid or air from passing between the piston and cylinder wall. This containment of pressure allows the piston to move smoothly, providing the necessary force for the cylinder to perform its function. Piston Seals are typically designed to handle both static and dynamic pressure, ensuring a reliable seal under various conditions.

What are the benefits of a Piston Seal?

Piston Seals ensure the efficient operation of hydraulic and pneumatic systems by preventing leaks and maintaining pressure. This reliable sealing reduces energy loss, enhances system performance, and minimises wear on internal components. Piston Seals also contribute to the longevity of the cylinder, helping reduce maintenance costs and downtime in demanding applications.

How to choose the correct Piston Seal?

Selecting the right Piston Seal involves considering factors such as the operating pressure, temperature, and fluid compatibility. The seal material should be chosen based on the type of application and environmental conditions, as different materials offer varying levels of resistance to heat, pressure, and chemicals. Accurate sizing is also essential to ensure a proper fit and effective sealing.

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