EPDM Diaphragms.

Cannon Gasket has the Capability to produce high strength, tear resistant diaphragms for your most critical and demanding applications. Diaphragms are commonly used in high pressure applications where the material must be flexible yet durable enough to withstand repeated flexing over a long period of time. Materials are integrated with reinforcing fabrics to improve application performance and durability, along with Capabilities to maintain responsiveness to variations in pressure. EPDM is the preferred diaphragm elastomer for water, steam, and outdoor service, combining long flex life with outstanding resistance to weather, ozone, UV, and water absorption. Cannon Gasket die-cuts EPDM diaphragms in plain and fabric-reinforced constructions. Common Diaphragm Fabrics include; Nylon, Dacron® / Polyester, Nomex®, Kevlar®, Fiberglass, Silk and Cotton.

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EPDM diaphragms, die-cut close-up
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Properties of EPDM diaphragms

Cannon Gasket cuts EPDM diaphragms to your drawing. Excellent resistance to ozone, UV, sunlight, water, steam, and brake fluid

EPDM tolerances and customization

Standard dimensional tolerances on EPDM diaphragms land around ±0.010" to ±0.015" on OD and ID, depending on material thickness and profile. Tighter tolerances are available on selected grades. Cannon Gasket cuts EPDM to custom profiles in-house and matches lead times to your production volume. PSA backing, pad printing, custom packaging, and kitting are all on the menu when you need them.

How EPDM Performs

As the flexing element inside solenoid valves, pressure regulators, and diaphragm pumps, EPDM holds its low-temperature flexibility and recovers reliably through repeated pressure cycles without hardening or cracking. Its brake fluid and steam compatibility also suit automotive and HVAC pressure-control parts.

Where EPDM Diaphragms Are Specified

- Diaphragm pumps and metering pumps - Water-treatment solenoid valves - Irrigation and drip-system pressure regulators - HVAC control valves and actuators - Automotive brake boosters and vacuum modulators - Pneumatic control diaphragms

Manufacturing Methods

Die-cut and Flash cutting available

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Key Properties
  • Long flex life
  • Weather, ozone & UV resistant
  • Water & steam resistant
Engineering Tools
Applications
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Capability
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Materials and fabrication capabilities behind every custom part we cut.
Frequently Asked Questions

Common EPDM diaphragm questions.

Are you ISO 9001 certified?
Yes, ISO 9001:2015 certified. Documented quality management covers incoming material verification, in-process inspection, calibrated measurement, final inspection, non-conformance handling, corrective action, and full lot traceability. AS9100-ready for aerospace, with MIL-spec and FDA 21 CFR 177.2600 / USP Class VI grades available on request.
Do you supply fabric-reinforced diaphragms?
Yes. Nylon or polyester fabric embedded in the elastomer adds tensile strength for high-pressure service. Common for hydraulic and pneumatic actuator applications above 100 psi.
What applications use custom diaphragms?
Diaphragm pumps, pressure regulators, pneumatic actuators, control valves, medical devices (ventilators, dialysis, infusion pumps), and pneumatic logic controls. We cut the diaphragm blank to your drawing in any of the stocked compounds.
Which materials are used for custom diaphragms?
Silicone for wide temperature and FDA grades, EPDM for weather and steam, Nitrile / Buna-N for fuel and oil pumps, Viton for aggressive chemicals, Fluorosilicone for aerospace fuel systems, and fabric-reinforced rubber for high-pressure applications.
How fast do you return a quote?
Most RFQs come back within one business day. Simple profile updates to an existing tool quote same-day. Send a drawing, DXF, or competing part number and our engineering team reviews material, tolerance, and volume before pricing.
What is the minimum order quantity?
Minimums depend on the part and material. We cut prototype and first-article quantities for engineering evaluation, then scale up to production volumes from the same tooling. For high-volume programs we run JIT, VMI, and Kanban replenishment out of Fontana, California.
What should I send with an RFQ?
Ideal: a drawing or DXF, material spec (or compound family), estimated annual volume, and any regulatory callouts (FDA, USP Class VI, AS9100, MIL-spec). If you only have a sample or a part number from a competing supplier, send that and we will reverse-engineer the spec before quoting.
What are typical lead times?
Prototype and first-article parts usually ship in 5-10 business days. Production runs from existing tooling are 2-3 weeks depending on volume and material lead time. Rush and expedite options available on a case-by-case basis.
Need custom EPDM diaphragms?
From prototype to production, any size, any volume.
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ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971