OEM & Aftermarket Pneumatic Control Valve Membranes
Diatax precision manufactures premium fabric-reinforced actuator valve diaphragms for high-performance pneumatic control valves. Whether you require custom-engineered membranes for a new OEM valve design or precision drop-in aftermarket replacements for legacy systems, our compression and injection molding expertise ensures zero-leakage modulation, linear travel, and exceptional cycle life.
To ensure proper physical assembly and compatibility with your system constraints, our diaphragms are manufactured to strict technical tolerances:
Selecting the right elastomeric compound is vital for thermal and chemical stability. The table below outlines our standard material grades and their operational envelopes:
| Elastomer Compound | Low-End Temperature | High-End Temperature | Key Environmental Suitability |
|---|---|---|---|
| NBR (Nitrile) | -30°C (-22°F) | +120°C (+250°F) | Standard compressed air, oils, and general hydrocarbons. |
| EPDM | -40°C (-40°F) | +150°C (+300°F) | Steam, outdoor ozone, weather, and polar solvents. |
| FKM (Viton®) | -20°C (-4°F) | +205°C (+400°F) | Aggressive acids, harsh chemicals, and high-heat environments. |
| Neoprene (CR) | -33°C (-28°F) | +100°C (+212°F) | General physical toughness, weathering, and moderate oils. |
| Silicone / Fluorosilicone | -50°C (-58°F) | +205°C to +230°C | Extreme low/high-temperature swings and specialized media. |
In high-pressure control valve applications, the integrity of the reinforcement layer is critical. A primary cause of premature diaphragm failure is "fabric bleed-through," where the internal fabric is exposed to the line media, leading to chemical degradation, wicking, and delamination.
Through advanced compression molding and precise tooling design, Diatax eliminates this issue. Our manufacturing process guarantees that the reinforcing fabric remains perfectly encapsulated between the two layers of rubber. The fabric never shows on the outer surfaces, ensuring 100% rubber-to-media contact for superior chemical resistance and maximum burst strength.
We manufacture actuator diaphragms engineered for the specific pressure dynamics of your valve body:
The high-strength fabric core is sandwiched perfectly in the middle of two rubber faces. Ideal for valves experiencing bi-directional pressure or where both sides are exposed to aggressive media.
One side features the elastomer face for chemical isolation and sealing, while the reverse side exposes the fabric layer. This design is highly effective for one-way pressure applications, reducing friction and extending flex life against the actuator piston or spring housing.
We utilize premium elastomeric compounds and industrial-grade textiles to ensure our rolling diaphragms and flat actuator membranes withstand extreme differential pressures and continuous throttling.
For OEMs, Diatax serves as a direct manufacturing partner. Beyond basic geometry, we offer custom development programs tailored to companies requiring fully validated components:
We offer in-house mold design, reverse engineering, and custom rubber compounding to develop proprietary actuator diaphragms that meet your exact stroke, burst pressure, and temperature requirements.
Precision bonding of elastomer layers to brass, stainless steel, or aluminum inserts to streamline complex multi-part valve assemblies.
Custom compounds available to meet specialized industry requirements, including FDA-compliant food-grade formulations, RoHS, and REACH guidelines.
Robust batch testing protocols covering tensile strength, durometer verification, and burst safety factor evaluations.
We manufacture a comprehensive catalog of 100% compatible aftermarket replacement diaphragms engineered to perfectly match the original dimensions, bolt-hole patterns, and stroke lengths of leading control valve brands.
Diatax exports premium pneumatic control valve diaphragms to refineries, power plants, and OEM assembly lines globally. Whether you are sourcing heavy-duty actuator membranes for European facilities, exact-fit diafragmas del actuador neumático for Latin American oil & gas operations, or metric Stellantrieb Membranen and Rollmembranen for German industrial controls, our facility is equipped for rapid international dispatch. We supply high-performance NBR, EPDM, and FKM replacements for all major global brands.
Yes. Diatax engineers premium aftermarket replacement diaphragms that are fully compatible with leading control valve actuators. We manufacture precision-molded replacements for heavily utilized models, including Fisher 657 and 667 actuators, Samson 3271 and 3277 pneumatic actuators, and Masoneilan 87/88 multi-spring actuators. Our aftermarket parts are built to meet or exceed original OEM specifications for cycle life and burst strength.
The industry standard for general pneumatic control valves is Nitrile (NBR) rubber, which offers excellent resistance to compressed air and trace compressor oils. For actuators exposed to extreme outdoor weather, ozone, or high temperatures, EPDM is highly recommended. All of our heavy-duty actuator diaphragms are fabric-reinforced using high-strength textiles like nylon or polyester to ensure maximum durability.
Pneumatic actuators rely on compressed air to drive a valve stem, creating intense, repetitive pressure across the surface of the rubber. A fabric-reinforced rubber diaphragm prevents the elastomer from stretching, ballooning, or rupturing under high pneumatic pressure. The fabric insert acts as a structural skeleton, allowing the diaphragm to flex millions of times without fatigue.
A flat molded diaphragm requires a relatively short stroke and relies on the stretch of the rubber. A rolling diaphragm is engineered with a deep, U-shaped convolution. As the actuator stem moves, the diaphragm "rolls" rather than stretches, allowing for a much longer stroke with zero friction and consistent effective pressure areas, making it ideal for precision pneumatic control valves.
Absolutely. Diatax is a trusted Tier-1 supplier for valve manufacturers across the USA and Europe. We provide complete custom OEM manufacturing, including specialized rubber compounding, precision tooling from your CAD models, and the production of complex rubber-to-metal bonded diaphragms to streamline your assembly process.
When ordering replacement actuator diaphragms, you should provide the actuator manufacturer, the specific model number (e.g., Fisher 657 Size 40), the required elastomer (NBR, EPDM, Silicone), and the operating temperature range. For custom designs, providing dimensional tolerances or the required stroke length will allow our engineering team to mold the exact part needed.