Diaphragm Products Metal-Inserted Diaphragms

Bellofram’s metal-inserted diaphragms are engineered for precision performance in applications that demand the integration of structural reinforcement within elastomeric components. These rubber to metal diaphragms combine the flexibility and sealing capabilities of rubber with the strength and rigidity of a metal (or plastic) insert — forming a reliable, bonded unit that performs under pressure.

During the molding process, the metal or plastic insert is either fully or partially encapsulated by the elastomer. This encapsulation creates a permanent bond between the materials, eliminating the need for secondary fastening or adhesive assembly steps. By reducing labor and component complexity, this method delivers cost-effective, high-integrity components for OEMs and system designers.

Our diaphragms with metal inserts are ideal for valve assemblies, actuators, pumps, regulators, and other mechanisms where precise movement and structural stability are critical. The metal insert adds dimensional stability and durability, while the surrounding rubber diaphragm provides flexibility, sealing capability, and environmental resistance.

Material Options for Rubber to Metal Diaphragms

Bellofram works with a wide variety of elastomers — including silicone, EPDM, nitrile, and FKM diaphragms — to meet application-specific needs. For high-temperature or chemically aggressive environments, we offer FKM seals that provide superior resistance to oils, fuels, and corrosive fluids. These combinations make our metal diaphragms suitable for use in industries like aerospace, automotive, medical, and fluid handling systems.

The integration of rubber and metal in a single molding operation allows for high repeatability and tight control over part geometry. Because the insert is molded directly into the diaphragm, the result is a seamless, reliable part with no shifting, misalignment, or separation issues — ideal for systems requiring consistent, repeatable actuation.

Customized Solutions for Metal-Inserted Diaphragms

Bellofram’s in-house molding and bonding capabilities allow for broad customization. We can incorporate inserts made from metals, engineered plastics, or other customer-specified materials. Diaphragm shape, thickness, and material formulation can also be tailored to fit exact design requirements, making our metal-inserted diaphragms a flexible solution for complex mechanical assemblies.

Whether you’re developing a new product or replacing an outdated component, Bellofram’s rubber to metal diaphragms offer a smart, efficient solution. With performance-proven bonding techniques and a wide range of material options, these components are built to meet the rigorous demands of today’s high-performance applications.