Bellofram Diaphragm Markets
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MARKETS
Bellofram Diaphragms are found in critical applications large and small, from the brakes on a train to the pump that delivers medicine to a hospital patient.
Our engineering expertise and knowledge of materials science equip us to develop application-specific products that keep matter separate and moving in the right direction. To see how we can help your business, click below.
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AEROSPACE
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INSTRUMENTATION AND
PROCESS CONTROL
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LPG AND
NATURAL GAS
REGULATORS
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WATER CONSERVATION
AND PURIFICATION
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INDUSTRIAL
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AUTOMOTIVE
AND RAILWAY
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CONSUMER
GOODS
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MEDICAL MARKET
The medical equipment where you’ll find Bellofram Diaphragms interfaces with people at an intimate level far exceeding that of most other machines. Our products are found in blood analyzers, anesthesia systems, vaporizers, medicator pumps, dialysis machines, catherization, oxygen regulators and reservoirs, and more.

DIAPHRAGMS DESIGNED SPECIFICALLY FOR:

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.

CONSUMER GOODS

 

Diaphragms are a multifaceted design element for a range of applications such as valves, pumps, regulators, actuators, and more. Bellofram Diaphragms has the versatility, history, and team to work with manufacturers to develop specific solutions and precise fits.

Customers turn to Bellofram for reliability, consultation, and quality they can count on. Our engineering expertise and knowledge of materials science and compounding creates high-performance diaphragms for a range of products and equipment. Sizes and configurations can be completely custom or adapted from our deep library of existing designs.

No product leaves our facility without undergoing rigorous testing for performance and quality.

Whether you need diaphragms for a current product line or for new products coming to market, Bellofram Diaphragms is your ultimate development partner.

MEDICAL

The medical equipment where you’ll find Bellofram Diaphragms interfaces with people at an intimate level far exceeding that of most other machines. In medicator pumps, for example, our diaphragms make surface contact with liquid that flows directly into the bloodstream. This illustrates the need for a highly technical, precise, and ethical supplier. The Bellofram name is trusted all over the world.

Most medical applications utilize our Class 3 top hat diaphragm with beaded flange. Our products are found in blood analyzers, anesthesia systems, vaporizers, medicator pumps, dialysis machines, catherization, oxygen regulators and reservoirs, and more.

Our understanding of exotic materials and precise tolerances allows us to produce solutions for the most challenging applications. Examples include ultra-thin diaphragms with the strength to reliably perform for 10 million cycles or more, and mixed-material product that combines silicone and metal inserts.
We are a member of the Rx-360 Consortium, a voluntary industry group dedicated to supply chain excellence within manufacturers and suppliers from the pharmaceutical and biotech industries. Membership subjects us to thorough and broadly shared audits, providing additional peace of mind for our customers.

To make an analysis of your specific application, please answer a few questions. Our engineers will respond within 24 hours.

TYPICAL APPLICATIONS

Typical applications include pneumatic cylinders, regulators, linear actuators, gauge protectors, air relay, demand valves, dashpots, and measuring instruments. Sample industries are aviation and aerospace hydraulics and air controls, process control, LPG and natural gas regulators, water management and irrigation for agriculture, industrial pneumatic cylinders and regulators, automotive master brake cylinders, medical and pharmaceutical devices, and consumer goods.