Whether you call it a spring energised seal, or a spring energized seal, the one component that’s doing a huge amount of the work is the seal energising spring.
It’s this spring that provides constant and reliable force. The spring keeps the seal lip pushed up against the mating surface, and that’s what ensures the consistent sealing performance, even when you throw in extreme pressure, high or cryogenic temperatures and movement.
At Clifford Springs we specialise in manufacturing the springs that energise those spring energised seals. We supply OEMs with these precision, high-performance components that keep critical equipment operating safely and efficiently.
What are Spring Energised Seals?
A spring energised seal is a type of high-performance seal usually made from materials such as PTFE, PEEK™, or other high-performance polymers.
The energising spring (sometimes known as a spring energiser) sits inside the seal applying a constant force that keeps the seal pressed firmly against the mating surface.
This spring is essential because it:
- Maintains the seal contact, even when pressure changes
- Compensates for temperature expansion and contraction
- Supports sealing at cryogenic temperatures
- Provides predictable, repeatable sealing force
- Allows the seal to operate in harsh, corrosive or abrasive environments
Without the internal spring, the seal would not be able to function properly, especially in environments such as:
- Hydrogen environments
- Chemically aggressive media
- High pressure oil and gas systems
- Cryogenic temperatures (-150ºC and below)
Or in applications where spring energised seals are widely used, such as:
- Actuators
- Valves
- Motorsport systems
- Etc.
The Role of the Seal Energising Spring
The seal energising spring applies a constant radial or axial force to the seal lip to ensure:
- Better sealing at low and zero pressure
- Immediate sealing on start-up
- Enhanced leak prevention
- Longer seal lifespan
- Improved equipment reliability
It is the spring that makes the seal seal.
Types of Springs Used in Spring Energised Seals
Different sealing challenges require different spring designs. Here at Clifford Springs we are specialist manufacturers of a range of seal energising springs, including:
1. Canted Coil Springs
Ideal for consistent sealing force, friction management and load control.
Used widely in spring energized seals for valves, actuators and hydrogen environments.
These are one of the most complex springs, and we’re one of only a small number of known manufacturers globally.
Find out more about Canted Coil here
2. Meander / Cantilever (V & U) Springs
Used where high load and greater deflection are required.
These are excellent for seals exposed to vibration, movement or uneven loading.
Find out more about V & U Springs here
3. Helical Springs
A robust energiser for compact spaces needing very high load with small deflection.
Often used in heavy-duty sealing applications.
Find out more about Helical Springs here
4. Garter Springs
These create consistent radial force, making them ideal for rotary seals, oil seals and cassette seals.
Find out more Garter Springs here
5. Anti-Extrusion Springs
Designed to support the seal when exposed to high pressure or extrusion risk.
Often used as part of multi-component seal arrangements.
Find out more about Anti Extrusion Springs here
6. PEEK™ Springs
A non-metallic alternative where chemical resistance, non-magnetic, or low-friction performance is required.
Ideal for chemical processing and applications where metal springs cause damage.
Find out more PEEK Springs here
7. Continuous Top Rail Springs
Used in specialised seals requiring a continuous, uniform load across the entire circumference.
Find out more here
Why Material Matters
Spring energised seals are often used in for equipment operating in harsh conditions. In these instances, it’s important to consider using the right material for the environment and requirements, including:
- Corrosion resistance
- Fatigue performance
- Temperature extremes
- Hydrogen embrittlement resistance
- Chemical compatibility
For these instances, Clifford Springs manufactures springs in:
- Monel®
- Inconel®
- Hastelloy®
- Elgiloy® / Phynox®
- PEEK™
As well as Stainless Steels 302, 316 and 17/7PH
NACE ISO 15156 materials available
Find out more here
Where Are Seal Energising Springs Used?
Our springs support seal performance in:
- Hydrogen valves and actuators
- Chemical processing equipment
- Cryogenic valves and pumps
- Oil & gas sealing systems
- Motorsport dampers and actuators
- Medical devices and fine-mechanical components
Every industry has its own unique demands, but each still relies on the seal energising spring for consistent sealing performance.
Why Choose Clifford Springs?
Our customers choose to work with us because of our:
- Decades of spring engineering expertise
- Advanced manufacturing capability
- Precision coiling for wire spring profiles
- Custom spring design support sizes from 0.02mm fine wire to larger spring profiles
- Material consultancy
- Global supply to seal, valve and actuator manufacturers
And, as part of the Lesjöfors Group, we’re part of a company that manufactures practically any spring you can imagine.
Precision manufactured springs are the hidden heart of every spring energised seal.
From cryogenic valves to hydrogen processing, the right spring ensures reliability, safety and sealing performance.
If you need advice on choosing the right energising spring for your seal, our technical team is here to help.
Get in touch here
