EUROSEAL® CHEMSEAL is an EPDM gasket with a PTFE envelope, consisting of an elastomeric EPDM core enclosed in PTFE, designed to ensure high chemical resistance, excellent elasticity, and reliable sealing even on delicate or non-metallic flanges.
The two polymers are bonded through an exclusive process that ensures adhesion between EPDM and PTFE, eliminating the typical issues of envelope gaskets, such as the risk of slippage or inversion of the lining.
The special gasket geometry reduces the contact area between the gasket and the flanges, allowing sealing to be achieved with significantly lower bolt load, up to 75% less compared to traditional PTFE solutions.
What is EUROSEAL CHEMSEAL
EUROSEAL® CHEMSEAL is an EPDM gasket with PTFE envelope designed to combine in a single solution:
- the elasticity and recovery capability of the elastomer
- the chemical resistance and inertness of PTFE
This configuration provides a reliable sealing solution even in critical conditions, where a gasket made of pure PTFE would be less effective in terms of elasticity.
How the EPDM + PTFE structure works
The working principle is based on the separation of material functions:
- Inner EPDM: Provides elasticity, compressibility, and recovery after tightening
- Outer PTFE: Protects the gasket from chemical attack and forms the sealing surface
Thanks to this configuration, the elastomer never comes into direct contact with the process fluid, increasing gasket lifetime and reducing degradation phenomena.
Technical advantages of CHEMSEAL gasket
High chemical resistance
The PTFE envelope makes this EPDM gasket suitable for aggressive fluids and chemically severe environments, ensuring long-term stability.
Reduced bolt load requirements
The gasket geometry significantly reduces the required tightening torque, a key feature for applications on non-metallic or sensitive flanges.
Reusability
Thanks to the permanent elasticity of EPDM, CHEMSEAL can be reused, reducing maintenance costs and downtime.
Improved safety on delicate flanges
Lower loads and uniform pressure distribution enhance operational safety, minimizing the risk of flange damage when using an EPDM gasket with PTFE envelope.
