Diaphragm Products
Diaphragm Products Fabric Reinforced Double-Coat Diaphragms
What Are Fabric Reinforced Double-Coat Diaphragms?
Fabric reinforced double-coat diaphragms are flexible, pressure-responsive components made by applying elastomer coatings to both sides of a reinforcing fabric. The fabric core provides added strength, dimensional stability, and resistance to stretching or ballooning, while the dual elastomer coating helps protect the reinforcement and support reliable sealing in applications where pressure or media exposure may occur on both sides.
Bellofram Elastomers manufactures custom fabric reinforced double-coat diaphragms for regulators, pumps, valves, actuators, rolling diaphragm applications, fluid control systems, and other equipment that requires dependable pressure response in demanding operating environments.
Key Takeaways
- Double-coat diaphragms have elastomer applied to both sides of the reinforcement fabric.
- Fabric reinforcement improves strength, dimensional stability, and pressure resistance.
- Dual-sided elastomer coverage helps protect the reinforcement from media and environmental exposure.
- Well suited for differential or bidirectional pressure applications.
- Different elastomer materials can be applied to each side for application-specific performance.
- Material options include nitrile, silicone, FKM, and other custom elastomer compounds.
- Ideal for regulators, pumps, valves, actuators, rolling diaphragms, and fluid control systems.
- Manufactured in the USA.
Why Choose Fabric Reinforced Double-Coat Diaphragms?
Fabric reinforcement allows a diaphragm to maintain flexibility while increasing its ability to withstand repeated pressure changes and mechanical movement. The internal fabric layer helps limit stretching, ballooning, and tearing while supporting consistent, repeatable diaphragm movement.
The double-coat construction adds elastomer to both sides of the reinforcement fabric, providing additional protection when both diaphragm surfaces may encounter pressure, media, or environmental exposure. This makes double-coat diaphragms particularly valuable in differential pressure and bidirectional pressure applications.
| BENEFIT | WHY IT MATTERS |
|---|---|
| Bidirectional Pressure Capability | Supports applications where pressure may be applied from either side of the diaphragm. |
| Improved Media Isolation | Elastomer on both sides helps shield the reinforcing fabric from process media and environmental exposure. |
| Enhanced Pressure Resistance | Fabric reinforcement helps resist stretching, ballooning, tearing, and deformation under fluctuating pressure. |
| Dimensional Stability | The reinforcement layer helps maintain consistent geometry and repeatable movement through repeated operating cycles. |
| Dual-Material Flexibility | Different elastomer materials can be applied to each side to address different media, temperature, or sealing requirements. |
| Custom Design Options | Geometry, thickness, elastomer formulation, and reinforcement can be tailored to the application. |
Double-Coat Diaphragm Material Options
Bellofram Elastomers offers multiple elastomer options for fabric reinforced double-coat diaphragms. Material selection depends on operating temperature, media exposure, chemical compatibility, pressure requirements, flexibility, and environmental conditions.
| MATERIAL | TYPICAL ADVANTAGES |
|---|---|
| Nitrile (NBR) | Commonly selected for resistance to oils, fuels, and petroleum-based fluids. |
| Silicone | Provides excellent flexibility and temperature stability for demanding operating environments. |
| FKM | Offers strong resistance to elevated temperatures, aggressive chemicals, oils, and fuels. |
| Custom Elastomer Compounds | Can be formulated for application-specific temperature, media, pressure, and performance requirements. |
Double-Coat vs. Single-Coat Fabric Reinforced Diaphragms
The primary difference between double-coat and single-coat fabric reinforced diaphragms is how the elastomer is applied around the reinforcing fabric. A double-coat diaphragm has elastomer on both sides of the fabric, while a single-coat diaphragm has elastomer on one side.
| FEATURE | DOUBLE-COAT DIAPHRAGM | SINGLE-COAT DIAPHRAGM |
|---|---|---|
| Elastomer Coating | Applied to both sides of the reinforcement fabric. | Applied to one side of the reinforcement fabric. |
| Weight and Thickness | Typically heavier due to the additional elastomer layer. | Typically lighter and thinner. |
| Media Exposure | Useful when both sides require elastomer protection or media isolation. | Well suited when the coated surface protects the fabric from the primary media. |
| Pressure Conditions | Often selected for differential or bidirectional pressure applications. | Ideal when pressure is primarily managed from one side. |
| Typical Priority | Dual-sided protection, media isolation, and more complex pressure environments. | Responsiveness, reduced weight, flexibility, and efficient material use. |
For applications where elastomer is only required on one side of the reinforcement fabric, explore our fabric reinforced single-coat diaphragms.
Common Applications for Fabric Reinforced Double-Coat Diaphragms
Fabric reinforced double-coat diaphragms are well suited for applications where both sides of the diaphragm may be exposed to pressure, media, or demanding environmental conditions.
| APPLICATION | HOW THE DIAPHRAGM HELPS |
|---|---|
| Pressure Regulators | Supports accurate pressure response where pressure conditions may vary across both sides of the diaphragm. |
| Pumps | Provides repeated flexible movement while helping isolate media and maintain sealing performance. |
| Valves | Supports controlled movement and sealing in fluid and gas control systems. |
| Actuators | Converts pressure changes into repeatable mechanical movement under complex pressure conditions. |
| Rolling Diaphragm Applications | Provides flexible movement, dimensional stability, and reliable sealing through repeated cycles. |
| Fluid Control Systems | Helps maintain separation and sealing where media exposure may occur on both sides of the diaphragm. |
Custom Fabric Reinforced Double-Coat Diaphragms
Bellofram Elastomers works with engineers and OEMs to develop reinforced diaphragm constructions tailored to demanding operating conditions. Customization can include diaphragm geometry, thickness, elastomer formulation, reinforcement fabric, pressure requirements, and environmental resistance.
Whether your application requires prototype quantities or production-scale manufacturing, Bellofram can help determine the appropriate materials and diaphragm construction for your system.
When Should You Choose a Double-Coat Diaphragm?
A fabric reinforced double-coat diaphragm may be the right solution when your application requires fabric reinforcement plus elastomer protection on both sides of the diaphragm.
Double-coat construction may be ideal when:
- Pressure may be applied from both sides of the diaphragm.
- Both sides require protection from media or environmental exposure.
- Differential or bidirectional pressure conditions are present.
- The reinforcing fabric must be isolated from process media.
- Long-term dimensional stability and repeated flexing are critical.
If your application primarily experiences pressure or media exposure from one side and reduced weight or thickness is a priority, a fabric reinforced single-coat diaphragm may be the better solution.
For lower-pressure applications requiring maximum pliability without fabric reinforcement, explore our homogeneous rubber diaphragms.
Why Choose Bellofram Elastomers for Fabric Reinforced Diaphragms?
Bellofram Elastomers combines elastomer material expertise, diaphragm engineering, and in-house molding capabilities to support custom pressure-control and sealing applications. Our team works with customers from prototype through production to select materials, reinforcement, geometry, and construction based on the application’s performance requirements.
Bellofram Elastomers offers:
- Custom fabric and elastomer combinations.
- Double-coat and single-coat diaphragm capabilities.
- Material options for demanding chemical and temperature environments.
- Custom geometry and thickness options.
- Prototype through production-volume manufacturing support.
- U.S.-based manufacturing in Newell, West Virginia.
Frequently Asked Questions About Fabric Reinforced Double-Coat Diaphragms
What is a fabric reinforced double-coat diaphragm?
A fabric reinforced double-coat diaphragm is a flexible, pressure-responsive component made with elastomer on both sides of a reinforcing fabric. The fabric increases strength and dimensional stability, while the dual elastomer coating helps protect the reinforcement and support reliable performance where both sides may experience pressure or media exposure.
What is the purpose of fabric reinforcement in a double-coat diaphragm?
Fabric reinforcement helps limit stretching, ballooning, tearing, and deformation as the diaphragm flexes under pressure. This can improve dimensional stability, pressure resistance, cycle performance, and repeatability in demanding applications.
What is the difference between a double-coat and single-coat diaphragm?
A double-coat diaphragm has elastomer applied to both sides of the reinforcement fabric, while a single-coat diaphragm has elastomer on one side. Double-coat designs are often selected for bidirectional pressure, media isolation, or applications requiring elastomer protection on both surfaces.
When should I use a double-coat fabric reinforced diaphragm?
A double-coat diaphragm may be appropriate when pressure or media exposure occurs on both sides, when the reinforcement fabric must be isolated from the process media, or when differential or bidirectional pressure conditions are present.
What materials are available for double-coat diaphragms?
Bellofram Elastomers offers double-coat diaphragms using materials such as nitrile, silicone, FKM, and other custom elastomer compounds. Material selection depends on temperature, media exposure, pressure, chemical compatibility, flexibility, and environmental requirements.
What are fabric reinforced double-coat diaphragms used for?
Fabric reinforced double-coat diaphragms are commonly used in pressure regulators, pumps, valves, actuators, rolling diaphragm applications, fluid control systems, and other equipment requiring flexible sealing and reliable performance under complex pressure conditions.
Can fabric reinforced double-coat diaphragms be customized?
Yes. Bellofram Elastomers can customize diaphragm geometry, thickness, reinforcement fabric, elastomer formulation, and other design characteristics to meet specific pressure, temperature, media, and performance requirements.
Does Bellofram Elastomers offer prototype and production quantities?
Yes. Bellofram Elastomers supports custom fabric reinforced diaphragm requests ranging from prototype and small production runs through full-volume manufacturing.
Are Bellofram Elastomers fabric reinforced diaphragms made in the USA?
Yes. Bellofram Elastomers manufactures fabric reinforced diaphragms at its U.S. manufacturing facility in Newell, West Virginia.
Click here to learn more about Bellofram Elastomers fabric reinforced diaphragms.
Your Satisfaction is Our Focus!
Thank you for completing this form. Your interest in our products & services is highly valued, and we're excited to be considered for your needs. Rest assured, we will carefully review the information provided to offer a tailored solution. Our experts will work diligently to ensure you receive a timely and accurate quote. Should you have any questions or need further assistance, please feel free to contact us. We eagerly await the opportunity to serve you.