Process & Sanitary Valve Diaphragms | Custom OEM & Aftermarket Solutions
Diatax engineers and manufactures high-purity process and sanitary valve diaphragms for the pharmaceutical, bioprocessing, food and beverage, and chemical processing industries. Leveraging our deep expertise in advanced compression molding and industrial mold design, we serve as a primary manufacturing partner for OEMs worldwide, while also supplying precision aftermarket rubber moulded diaphragms for legacy processing lines.
Our manufacturing facilities specialize in solving the most complex challenges in sanitary valve operation: preventing PTFE delamination, ensuring hygienic sealing during CIP/SIP (Clean-In-Place / Steam-In-Place) cycles, and securely anchoring valve stem inserts.
For OEMs designing next-generation process control valves, Diatax provides end-to-end manufacturing capabilities, from initial industrial mold design to full-scale production.
A critical failure point in composite sanitary diaphragms is the delamination of the PTFE (Teflon) shield from its elastomeric backing. Through specialized chemical etching and proprietary compression molding techniques, Diatax creates an unbreakable bond between the PTFE face and the rubber substrate (such as EPDM or FKM). This guarantees that our PTFE lined rubber diaphragms withstand extreme vacuum pressures and severe thermal cycling without blistering or peeling.
The mechanical connection between the diaphragm and the valve compressor is vital for precise flow control. We encapsulate and bond custom metal inserts directly into the elastomer matrix during the molding process.
We do not rely on standard, off-the-shelf rubber. Our in-house compounding capabilities allow us to formulate FDA-approved, food-grade elastomers that meet your exact chemical resistance and temperature parameters, ensuring ultra-clean fluid isolation.
| Material Grade | Key Characteristics & Best Applications |
|---|---|
| PTFE Bonded / PTFE Lined | Ultimate chemical inertness. Features a continuous PTFE shield bonded to a resilient EPDM or FKM backing. Ideal for aggressive chemicals, APIs, and high-purity pharmaceutical manufacturing. Compliant with FDA 21 CFR 177.2600 and USP Class VI. |
| FKM (Viton®) | Formulated in-house for high-temperature continuous processing. Exceptional resistance to oils, harsh acids, and extreme CIP/SIP sterilization temperatures. |
| EPDM (Peroxide Cured) | The industry standard for sanitary applications. Excellent resistance to steam, ozone, and alkaline cleaning solutions. CIP/SIP Autoclave Resistant. |
| Silicone (VMQ) | Ultra-pure, highly flexible, and biologically inert. Often utilized in bioprocessing, food handling, and cosmetics manufacturing. |
We design and manufacture molds for both primary sanitary valve body geometries:
As an export-ready industrial manufacturer, Diatax supplies high-purity sanitary valve diaphragms and custom elastomeric membranes to pharmaceutical facilities, bioprocessing plants, breweries, and chemical processors worldwide.
Whether you require replacement hygienic diaphragm valve spares and bioprocess valve diaphragms for UK and Irish biopharma hubs, metric Aseptik-Membranen or EPDM/PTFE Verbundmembranen compatible with German GEMU and Burkert systems, or heavy-duty diafragmas para válvulas sanitarias (tipo vertedero y paso recto) for Latin American processing plants, Diatax provides fully traceable, export-compliant solutions. All export batches are packaged for cleanroom ingress and accompanied by complete material compliance documentation.
In addition to our OEM custom manufacturing, Diatax maintains a comprehensive catalog of aftermarket sanitary diaphragms. We provide direct-fit replacements engineered to match the original factory dimensions, thread sizes, and sealing profiles of leading global brands.
Highly searched direct-replacement compatibility includes:
Type-A weir-type and Type-KB straight-through replacement diaphragms.
PTFE/EPDM laminated diaphragms and standard elastomer replacements.
Sanitary diaphragm replacements for aseptic processing valves.
Heavy-duty process valve membranes.
Replacement membranes for high-purity radial and block valves.
Note: All manufacturer names and brands are listed strictly for cross-reference and compatibility purposes. Diatax is an independent manufacturer of premium OEM and aftermarket replacement parts.
A: Yes. Because we design and machine our industrial molds in-house, we can customize the integrated threaded stud (metric or imperial), bayonet, or pin connection to match your exact actuator stem requirements.
A: We utilize a highly controlled preparation process that includes specialized surface etching of the PTFE, followed by the application of proprietary bonding agents during the high-pressure compression molding cycle. This results in a chemical-mechanical bond that resists extreme shear forces.
A: Absolutely. If standard EPDM or PTFE is not suitable for your process media, our compounding experts will formulate a specific FKM (Viton®) blend tailored to your temperature and chemical resistance requirements.
A: Yes. Diatax manufactures direct-fit replacement membranes engineered to match the exact dimensions, weir profiles, and connection hardware (threaded studs, bayonets, and pin mounts) of major European valve brands. We export to pharmaceutical, dairy, and chemical processing facilities across Europe, North America, Latin America, and Asia.
A: Yes. Our sanitary elastomers and PTFE-lined composites are formulated from raw materials that meet FDA 21 CFR 177.2600 and USP Class VI requirements for biological reactivity. They are fully resistant to standard Clean-In-Place (CIP) chemicals and continuous Steam-In-Place (SIP) sterilization cycles.