Diaphragm Products Fabric Reinforced Double-Coat Diaphragms

Bellofram’s fabric reinforced double-coat diaphragms are engineered to provide reliable performance in applications where pressure is applied to both sides of the diaphragm. These specially designed reinforced diaphragms feature rubber coatings on both sides of a fabric layer, creating a flexible yet highly durable seal capable of withstanding complex mechanical and environmental demands.

In contrast to single-coat configurations, double coated diaphragms are built to manage differential pressure from multiple directions. The addition of rubber to both surfaces helps maintain diaphragm integrity and responsiveness, even under frequent actuation and fluctuating pressures. This makes them ideal for rolling diaphragm applications, pressure regulators, pumps, actuators, and industrial valve systems.

The integrated fabric core provides the necessary structural strength, allowing the diaphragm to flex repeatedly without stretching, ballooning, or tearing. This internal layer enhances dimensional stability and ensures long-term durability in systems where precise movement and pressure control are critical. The dual-coat design further contributes to sealing performance by shielding the fabric layer from media contact and environmental exposure.

Custom Fabric Reinforced Rubber Diaphragms for Demanding Applications

Bellofram manufactures fabric reinforced rubber diaphragms using a wide variety of elastomer types, including EPDM, nitrile, neoprene, and FKM diaphragms for high-temperature or chemically aggressive environments. Our FKM seals are especially suited for use in harsh industrial applications, offering excellent resistance to oils, fuels, and corrosive media.

The ability to apply different rubber materials to each side of the fabric-reinforced core also allows for dual-function performance — such as one side designed for chemical resistance and the other optimized for pressure sealing. This level of design flexibility supports highly customized diaphragm solutions for unique or demanding applications.

Precision-Engineered Double-Coated Diaphragm Solutions

Bellofram’s in-house engineering and molding capabilities ensure tight tolerances, repeatable quality, and full material traceability. Whether your project requires prototyping or large-scale production, our team can assist in selecting the right materials, geometry, and reinforcement type to match your performance goals.

With excellent pressure-handling capabilities, long-term flexibility, and broad material options, Bellofram’s fabric reinforced double-coat diaphragms are the trusted choice for OEMs and engineers across a wide range of industries. From industrial automation to fluid control systems, these diaphragms deliver the reliable sealing and motion control needed in dual-pressure environments.