Spring-loaded seals

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Spring-assisted seals are made of highly resistant materials (e.g. PTFE) that are pre-tensioned by a metal spring incorporated inside. The spring ensures a constant contact pressure and provides a durable, efficient seal - regardless of temperature, chemicals or pressure conditions.

Application - For demanding applications
Our spring-loaded seals are used in the chemical and pharmaceutical industries:

Chemical and pharmaceutical industries: Sealing aggressive media and processes with high temperatures and pressures.
Mechanical engineering: Sealing pistons and rods in hydraulic and pneumatic systems.
Food technology: Use in FDA-compliant and biocompatible systems.
Aerospace: Applications with vacuum and large temperature fluctuations.
Hydrogen technology: Safe solution for tanks and pipes in H2 environments.

Advantages over elastomer seals

Spring-assisted seals offer many decisive advantages over conventional elastomer seals:

Advantage	Spring-assisted seal	Elastomer seal
Temperature range	-250°C to 300°C	limited, often <150°C
Chemical resistance	universal, even with aggressive media	often limited to certain media
Pressure resistance	up to 120 MPa static, up to 50 MPa dynamic	usually lower
Service life / maintenance	very high, low wear	often higher maintenance requirements
Dynamic load	high load capacity, little stick-slip	Problems with stick-slip possible
Friction / energy loss	low, good in dry running	higher, critical in dry running
FDA conformity / biocompatibility	available	dependent on material

Additional advantages:

Vibration and oscillation damping due to the spring
Minimal leakage, ideal for critical media such as hydrogen
Low breakaway forces and high reliability even after standstill

Spring types in spring-assisted seals

The type of spring has a significant influence on the functionality and suitability of the seal for different applications. The main spring types are

V-spring (Meander spring):

A plate with a V-shaped opening that provides stable and constant elasticity. Widely used in static and dynamic applications. Good compensation for wear and tolerances.

C-spring (support coil spring):

A linear spiral with an elastic instability that allows good adaptability to specific requirements. Often used in specialised seals.

Spring materials and areas of application

Stainless steel as standard for a wide range of applications.
High-performance alloys such as C-276, Elgiloy or Inconel for corrosive and high-temperature resistant requirements.
The spring force is selected to precisely match the application to ensure optimum sealing performance and a long service life.

Put your trust in WESTRING Dichtungstechnik - your partner for spring-assisted seals

Many years of experience in development and production
Expert advice from selection to commissioning
Flexible production with fast delivery
Made in Europe - quality and reliability

Do you need assistance? We will be happy to call you back!

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Max-Mustermann

T: +49 01234 056 708 91