Rubber Seals and O-Rings
Y Seals and Y O-Rings
A range of Y seals and Y O-rings covering the standard hole and shaft universal type, commonly called the Y-ring, along with YX hole, YX shaft, QY hole, QY shaft, high and low Y-type hole and shaft seal rings and KY shaft types.
Product Overview
A range of Y seals and Y O-rings covering the standard hole and shaft universal type, commonly called the Y-ring, along with 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 four parameters: the ratio of inner and outer lips, the cross-section, the angle between the two lips and the height. Those four decide whether a lip seal actually seals in a given groove and pressure.
Key benefits
Why Buyers Choose This Specification
Lip Geometry Is the Specification
Inner and outer lip ratio, cross-section, lip angle and height. A Y seal that is the right diameter but the wrong lip angle leaks, and none of those four appear on a part number.
Hole and Shaft Types Distinguished
A hole seal and a shaft seal are not interchangeable, because the sealing lip faces the other way. Both are supplied for every type.
Standard and Specialised Profiles
From the universal Y-ring through YX, QY, high and low Y types and KY shaft types, so an existing groove can be matched rather than remachined.
Pressure-Energised Sealing
A Y profile uses system pressure to push the lips apart against the sealing surfaces, which is why it seals better as pressure rises rather than worse.
Application scenarios
Where It Is Used
- Hydraulic cylinder rod and piston sealing
- Pneumatic cylinder sealing
- Automotive fluid systems preventing leakage
- Reciprocating shaft sealing
- Replacing worn seals in existing equipment
- Sealing in grooves designed for a specific Y profile
Who it is for
The Buyers This Product Suits
Hydraulic Equipment Makers
Y seals are the standard dynamic seal for reciprocating hydraulic applications.
Automotive Suppliers
Y seals are used in various car parts to ensure no leakage of fluids.
Maintenance Engineers
Matching an existing groove to the right Y profile is usually faster and cheaper than machining a new groove.
Problems it solves
What It Fixes
Seals That Leak at Low Pressure
Lip angle and lip ratio govern the initial contact force. Getting the profile right is what makes a seal work before pressure energises it.
Grooves That Do Not Match Standard Seals
A wide range of profiles means the seal is selected to the groove rather than the groove remachined.
Hole and Shaft Seals Confused
Both variants are supplied and labelled for every type, which removes the most common ordering error.
Specifications
Published Figures For This Product
Every value below comes from our own product specification. Where a figure is not published we leave it out rather than estimating it.
| Standard Type | Hole and shaft universal, commonly called the Y-ring |
|---|---|
| Specialised Types | YX hole, YX shaft, QY hole, QY shaft, high and low Y-type hole and shaft seal rings, KY shaft type |
| Design Parameters | Ratio of inner and outer lips, cross-section, angle between two lips, height |
| Material | Rubber elastomer, selected to fluid and temperature |
| Automotive Use | Various car parts, to ensure no leakage of fluids |
| Grade | Confirm with us before ordering |
Packing and documents
How It Ships And What Comes With It
Packing And Loading
Shipping volume for this item depends on the configuration and capacity you select, so no fixed container figure is published. Confirm the specification and the destination and a loading plan is issued with the quotation, rather than a figure we cannot support.
Documentation On File
- Rubber Seals and Plastics · Rubber Seals and O-Rings Specification Sheet20.5 KB
- Catalogue · Full Product Catalogue154.0 KB
Sourcing And Inspection
This product is supplied through TrueGlow Imaging, working with manufacturing partners whose facilities are visited and verified rather than taken on trust. In-process quality control and delivery supervision are available so goods are inspected before the container is sealed. Certifications quoted on this page are those stated on the product specification and belong to that product range rather than to our trading entity, so ask for the certificate covering your specific item.
Handling guide
Getting It Right First Time
Step 1
Measure the groove width, depth and diameter before selecting a seal.
Step 2
Confirm whether the seal is a hole type or a shaft type, since they are not interchangeable.
Step 3
Match the material to the fluid and the operating temperature.
Step 4
Check surface finish on the sealing face, since a rough surface destroys a lip seal quickly.
Step 5
Fit with the lips facing the pressure, or the seal will not energise.
Comparison
How It Compares In Our Range
Y seals against plain O-rings in dynamic service.
| Y Seals and Y O-Rings | Lip profile energised by pressure, designed for reciprocating dynamic sealing on rods and pistons. |
|---|---|
| O-Rings | Simpler and cheaper, excellent for static sealing, but wear faster in reciprocating dynamic service. |
FAQ
Y Seals and Y O-Rings Questions
Which Y seal types do you supply?
The standard hole and shaft universal type or Y-ring, plus YX hole, YX shaft, QY hole, QY shaft, high and low Y-type hole and shaft seal rings, and KY shaft types.
What parameters define a Y seal?
The ratio of inner and outer lips, the cross-section, the angle between the two lips, and the height.
What is the difference between a hole and a shaft seal?
The lip orientation. A hole type seals against a bore, a shaft type against a rod. They are not interchangeable.
Can you match an existing seal?
Yes. Send the old seal or the groove dimensions and the profile is matched.
Which industries use these seals?
Automotive among others, where they are used in various car parts to ensure no leakage of fluids.
Can you make custom sizes?
Custom profiles and sizes are quoted from your groove dimensions and operating conditions.
Related products
Other Products Buyers Look At
Industries
Sectors That Use This Product
Metal Fabrication and Machine Shops
Custom parts, tooling and the cranes that move them around the shop.
Warehousing and Heavy Industry
Lifting from 250 kg to 360 tons, indoors on a runway or outdoors on legs.
Food Packaging Lines
Depalletizing to palletizing, balanced against the filler in the middle.
Further reading
Guides That Cover This Product
Selecting an O-Ring Material NBR EPDM FKM or FFKM
Almost every seal failure is a material selection error rather than a dimensional one. The fluid and the temperature decide the elastomer, and the size is the easy part.
Quote Y Seals and Y O-Rings
Send the capacity or size you need, the quantity and the destination, and we will confirm the configuration, the lead time and a loading plan.