Your Trusted Source for Industrial Valve Diaphragms
Diaphragms.com supplies replacement and OEM-quality diaphragms for every type of industrial valve and pump application — from general-purpose rubber to PTFE, metal, and sanitary-grade solutions. Serving engineers worldwide since 1985.
Compatible With Leading Valve Brands
Industrial Diaphragm Product Lines
We stock and supply every class of diaphragm used in industrial valve and pump service. Select a category below to learn more or request pricing.
🔴Rubber Diaphragms
Natural rubber and synthetic elastomer diaphragms offering excellent flexibility and chemical resistance for general-purpose valve applications.
⚪PTFE / Teflon Diaphragms
Virgin and filled PTFE diaphragms for aggressive chemical environments, FDA-compliant applications, and high-purity processes.
⚙️Metal Diaphragms
Stainless steel, Hastelloy, and Inconel diaphragms for extreme temperature and high-pressure service where elastomers are unsuitable.
🟤Fabric-Reinforced Diaphragms
Nylon, polyester, or aramid-reinforced rubber diaphragms providing superior burst strength and dimensional stability under cyclic loads.
🔵Weir-Type Valve Diaphragms
Precision-molded diaphragms designed for Saunders and weir-type diaphragm valves, ensuring positive shut-off and long service life.
🟢Straight-Through Diaphragms
Flat and contoured diaphragms for straight-through (full-bore) diaphragm valves used in slurries, solids-bearing fluids, and sanitary lines.
🩺Sanitary / Hygienic Diaphragms
FDA-compliant, 3-A certified diaphragms for pharmaceutical, food & beverage, and biotech industries requiring the highest purity standards.
🔧Pump Diaphragms
High-cycle diaphragms for air-operated double-diaphragm (AODD) pumps, metering pumps, and hydraulic actuators requiring fatigue resistance.
Don't see what you need? We cross-reference any OEM part number.
Request Custom DiaphragmFour Decades of Valve Diaphragm Expertise
Diaphragms.com — operated by Rotork Valve Supplies — has been a specialist supplier of industrial valve diaphragms and valve trim since 1985. Based in the United Kingdom with distribution hubs in Europe and North America, we serve maintenance teams, plant engineers, and procurement departments across six continents.
Our focus is simple: keep your valves running. We maintain an inventory of more than 5,000 diaphragm part numbers covering weir-type, straight-through, and angle-body diaphragm valves from every major manufacturer. When a standard part will not do, our in-house engineering team reverse-engineers and manufactures bespoke diaphragms to your specification.
Whether you are refurbishing a single valve or sourcing for a planned shutdown across a major petrochemical facility, our team provides the technical knowledge and responsive service that critical industrial operations demand.
The Diaphragms.com Difference
Thousands of engineers worldwide rely on us to source the right diaphragm, fast.
Global Manufacturer Network
Direct relationships with leading manufacturers worldwide ensure you receive genuine OEM-quality parts at competitive prices.
Custom Fabrication
Cannot find a match? Our engineering team produces custom diaphragms to your exact dimensional and material specifications.
Fast Worldwide Shipping
Extensive inventory on hand for same-day or next-day dispatch. Emergency stock programs available for critical applications.
Material Expertise
Over 40 years of combined experience helping engineers select the right elastomer or PTFE grade for any chemical, temperature, or pressure duty.
Quality Assurance
Every diaphragm leaves our facility with dimensional inspection, durometer testing, and full material traceability documentation.
Cross-Reference Service
Send us your OEM part number or a worn diaphragm sample and we will identify a compatible replacement — often at lower cost.
Get a Quote or Technical Enquiry
Send us your part number, valve brand, size, and material requirement. Our team will respond within 24 hours (often same business day) with pricing and availability.