AEROSPACE

For more than three decades, aerospace customers have relied on Bellofram for technical solutions to their most challenging application questions. Working engineer-to-engineer, we draw on hard-earned, seen-it-all wisdom to further and refine application-specific products for the critical systems within aircraft. As the aerospace diaphragm leader, our products are found in environmental control systems, fuel cells, turbine engines, auto pilot controls, governors, hydraulics, and more..

Our materials experience applied to the operating conditions under which diaphragms must perform results in an unparalleled product, crafted with pride in the U.S.A.

We are AS9100 certified, with critical quality controls in place along every step in the manufacturing process. Our nimble manufacturing model allows us to fulfill orders from the tens to the thousands. We can even divide orders and synch delivery to meet customers’ just-in-time inventory practices.

INSTRUMENTATION AND PROCESS CONTROL

Because of its unique properties, the Bellofram Rolling Diaphragm is widely used in instruments and process controls requiring high sensitivity to small pressure changes, excellent accuracy and reproducibility, and no leakage. Typical applications include pressure regulators, linear actuators, demand valves, dashpots, measuring instruments, gauge protectors, and air relays.

We also make the diaphragms that go into the instrumentation and process controls made by our sister companies within the Marsh Bellofram companies, many of which are internationally respected in their own right.

These include gas pressure regulators, back pressure regulators, air/gas regulator systems, manifolds, instruments, electronic pressure control, and needle valves for BelGAS, a global leader in the design and manufacture of high- and low-pressure regulator products for the oil and gas industry.

For Bellofram Precision Controls, you’ll find our diaphragms in precision air pressure regulators, diaphragm air cylinders, electronic pressure transducers, filter regulator lubricators, pneumatic relays, servo pressure controllers, accessories, and add-ons.

With our diverse mix of external and internal customers, we’re ready to bring world-class diaphragm sealing to your industrial applications.

LPG AND NATURAL GAS REGULATORS

Because of its unique properties, the Bellofram Rolling Diaphragm is widely used in instruments and process controls requiring high sensitivity to small pressure changes, excellent accuracy and reproducibility, and no leakage. Typical applications include pressure regulators, linear actuators, demand valves, dashpots, measuring instruments, gauge protectors, and air relays.

We also make the diaphragms that go into the instrumentation and process controls made by our sister companies within the Marsh Bellofram companies, many of which are internationally respected in their own right.

These include gas pressure regulators, back pressure regulators, air/gas regulator systems, manifolds, instruments, electronic pressure control, and needle valves for BelGAS, a global leader in the design and manufacture of high- and low-pressure regulator products for the oil and gas industry.

For Bellofram Precision Controls, you’ll find our diaphragms in precision air pressure regulators, diaphragm air cylinders, electronic pressure transducers, filter regulator lubricators, pneumatic relays, servo pressure controllers, accessories, and add-ons.

With our diverse mix of external and internal customers, we’re ready to bring world-class diaphragm sealing to your industrial applications.

WATER CONSERVATION AND PURIFICATION

It’s been said that water is life. You’ll find our diaphragms in purification and reverse-osmosis systems in which they come in direct contact with water that will be consumed by people. We take that responsibility very seriously.

These applications use Class 3 Bellofram Rolling Diaphragms with a beaded flange. The flange is similar to an O-ring, and seals the diaphragm via axial compression of the D-shaped bead. Compositionally, the diaphragms are nitrile-based, frequently have polyester backing for increased strength, and at times are formulated with custom nitrile blends to withstand erosion from chloramines added as a purifier to some municipal water supplies. We have designs that approach a decade of service before they need to be replaced.

Our diaphragms are also used in lavatory fixtures that demand both high pressure and judicious use of water.

Often, our innovation is driven by customer need. Our industry-leading teams of engineers and chemists work directly with customer engineers. They can analyze customer-provided specs and make recommendations, generate all-new design concepts based on application, or fine-tune existing designs to better suit an application. We are also able to accommodate smaller runs. Working in smaller batches helps assure higher quality and excellent delivery times.

INDUSTRIAL

Bellofram Rolling Diaphragms are found across the spectrum of industrial markets. These vital components are the result of our intensive research and development to produce improved frictionless and leak-proof rolling seals that handle pressures, temperatures and stroke lengths over an extremely wide range. We invented the rolling diaphragm in 1950, and have been at the forefront of innovation and application-specific solutions to friction and leakage ever since.

Our modern, American facility is constructed and fully integrated specifically for the high-volume, high-precision manufacture of elastomer products. While maintaining our international reach, we remain nimble enough to take on the smaller and specialty orders that other companies often reject. This capability has made us a valued partner to all sizes of industrial customers.

Bellofram Rolling Diaphragms are used in a wide range of industries such as refineries, chemical plants, food processing, and other process industries, in applications including pumps, actuators, regulators, pneumatic controls, valves, tensioning devices, and metering devices.

Typically manufactured in Class 1B or Class 3, examples of common materials include nitrile and neoprene, EPDM, and fluorocarbon, which is used for environments with solvent-based chemicals.

AUTOMOTIVE AND RAILWAY

In the automotive sector, you’ll often find our diaphragms in aftermarket Exhaust Gas Recirculation (EGR) systems that control emissions from motor vehicles. These applications generally use our Class 3 diaphragms with a beaded flange, similar to an O-ring, that seals the diaphragm via axial compression of the D-shaped bead. Some use the Class 3C diaphragm, which has characteristics similar to the Class 3, except the convolution is molded in. This design is mostly used where differential pressures do not exceed 150 psi.

Our chemists develop multiple formulations depending on the type of fuel that is burned in the vehicle. Most require fluorosilicone elastomers, while hydrogenated nitrile is used with diesel engines.

Our diaphragms are also critical components in the pneumatic systems that control air brakes used on rail cars.