Diaphragm Products Homogeneous Rubber Diaphragms

Bellofram’s homogeneous rubber diaphragms — also referred to as all rubber diaphragms — are engineered for low-pressure applications that require flexibility, precision movement, and effective sealing without the added reinforcement of fabric. These engineered rubber diaphragms deliver consistent performance in systems where pressure conditions are moderate and space or sensitivity demands a more pliable component.

Constructed entirely of elastomeric material, these diaphragms provide the same sealing and flexing capabilities as fabric-reinforced versions, but with a simplified, single-material design. The absence of fabric reinforcement allows for increased softness and pliability, making them ideal for applications that rely on highly responsive actuation or delicate pressure control. Despite their simplified construction, Bellofram’s homogeneous diaphragms maintain excellent sealing performance, durability, and resistance to wear.

These components are commonly used in pneumatic devices, fluid control systems, low-pressure regulators, valves, and metering systems. Their construction makes them well-suited for environments that demand repeated flexing with minimal force or movement. Each diaphragm rubber seal is manufactured to tight dimensional tolerances, ensuring reliable and repeatable behavior across a wide variety of operational settings.

Material Options for Rubber Diaphragm Seals

Bellofram offers a variety of elastomers for our rubber diaphragm seals, including silicone, EPDM, nitrile (NBR), and FKM diaphragms for high-temperature or chemical-resistant applications. Our FKM seals are especially beneficial in low-pressure systems exposed to aggressive fuels, oils, or corrosive fluids, offering superior chemical compatibility without sacrificing elasticity.

Even without a fabric layer, these diaphragms maintain excellent resistance to environmental factors such as ozone, UV light, and temperature fluctuations. Depending on the rubber compound selected, our all rubber diaphragms can perform in a wide thermal range and maintain flexibility over time. This ensures lasting performance in sensitive or regulated environments.

Customized Engineered Rubber Diaphragm Solutions

At Bellofram, we work closely with customers to design and produce engineered rubber diaphragms that meet their exact performance and environmental requirements. Our in-house materials expertise and molding capabilities allow us to customize diaphragm geometry, thickness, and material formulation to match your unique specifications.

Whether you’re looking for a simplified, flexible diaphragm for a new system or a drop-in replacement for an existing component, Bellofram’s homogeneous rubber diaphragms offer the durability and precision your low-pressure application demands.