Y Seals and Y O-Rings

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A plain O-ring is not the right answer for every dynamic duty, which is why the Y profile exists. Our range runs from the standard hole shaft universal type commonly called the Y-ring through to YX hole, YX shaft, QY hole, QY shaft, high and low Y-type hole and shaft seal rings, and Ky shaft types. Each is designed around the ratio of inner and outer lips, the cross section, the angle between the two lips and the height.

Key Benefits

• A profile designed for dynamic duty rather than adapted from a static one
• Hole and shaft variants so the seal suits the direction of pressure
• Design parameters controlled deliberately rather than copied approximately
• Custom profiles tooled in our own mould workshop
• Available in the same compound range as the rest of our seal programme

Problems It Solves

• Plain O-rings wearing rapidly in reciprocating service
• Seal profiles specified by outline only, without lip geometry
• Hole and shaft types confused, so the pressure acts on the wrong lip
• Discontinued profiles with no remaining supplier

Who It Is For

• Hydraulic and pneumatic cylinder manufacturers
• Equipment rebuilders replacing worn dynamic seals
• Design engineers specifying a dynamic seal for the first time
• Distributors supplying hydraulic seal kits

Application Scenarios

• Hydraulic cylinder rod and piston sealing
• Pneumatic actuator sealing
• Automotive applications preventing fluid leakage between moving parts
• Reciprocating equipment where a plain O-ring wears too quickly

What You Are Actually Buying

Only values our own records support appear here. Anything we cannot evidence is left out rather than estimated.

Profile Families	Y-ring hole shaft universal, YX hole, YX shaft, QY hole, QY shaft, high and low Y-type hole and shaft, Ky shaft
Design Parameters	Inner and outer lip ratio, cross section, angle between lips, height
Duty	Dynamic reciprocating sealing
Compounds	Available across our twelve compound range
Country of Manufacture	China

Materials

• NBR
• FKM
• HNBR
• EPDM
• SIR silicone

Manufacturing Process

• Profile selection
• Mould design
• Mould manufacture
• Moulding
• Inspection
• Packing

Technical Features

• Designed on the ratio of inner and outer lips
• Cross section and lip angle specified rather than approximated
• Height controlled as a design parameter
• Hole and shaft variants across several type families

Quality Control

• Profile confirmed against the hardware before tooling
• First article approved by the customer before series
• Lip geometry checked on the moulded part
• Repeat orders run from the same tool

Customisation Options

• Any of the listed hole and shaft type families
• Custom profiles designed from a drawing or a worn sample
• Compound selected against the hydraulic fluid and temperature
• Supplied within a mixed seal order

Where This Is the Right Choice and Where It Is Not

Compared With A plain O-ring

In reciprocating duty the lip profile handles pressure and wear in a way a round cross section does not.

Compared With A stock seal kit

Kits cover common sizes. A tooled profile covers the hardware you actually have.

Compared With Wrong hand type

A hole type fitted where a shaft type belongs puts pressure on the wrong lip and leaks from new.

How to Specify and Order This Part

• Identify whether the seal works in a hole or on a shaft before choosing a type

Identify whether the seal works in a hole or on a shaft before choosing a type

• Give rod or bore diameter, groove width and depth together

Give rod or bore diameter, groove width and depth together

• State the hydraulic fluid and temperature so the compound suits it

State the hydraulic fluid and temperature so the compound suits it

• Send a worn sample where the original type is unknown

Send a worn sample where the original type is unknown

• Check surface finish on the sealing face during rebuilds

Check surface finish on the sealing face during rebuilds

Related Products

O-Rings

An O-ring is the cheapest part in most assemblies and the most common cause of a warranty return.

NBR O-Rings

NBR is the working compound for anything that meets oil or fuel at moderate temperature.

HNBR O-Rings and HNBR Seals

HNBR is the compound we reach for when a nitrile seal has to stay reliable in cold medium service.

Rubber Moulds

We have our own mould manufacturing workshop and experienced structural design engineers, so we can independently design and develop rubber moulds rather than pass the work on.

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Compression Transfer and Injection Moulding for Rubber Parts

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Y Seals and Y O-Rings Questions

The standard hole shaft universal Y-ring, YX hole, YX shaft, QY hole, QY shaft, high and low Y-type hole and shaft seal rings, and Ky shaft types.

It depends on whether the seal works against a bore or a rod. Send the assembly detail and we will confirm.

Yes. We will produce a drawing for approval before tooling.

The same range as the rest of our seal programme, chosen against the fluid and temperature.

Pricing improves with quantity. Send the volume with your inquiry and we will quote accordingly.

One working day once we have the profile, size, compound and quantity.

Quote Y Seals and Y O-Rings

Send the size or drawing, the working conditions and the quantity. One working day for a considered reply.