Custom Medical O-Rings

Fecision manufactures custom Medical O ring for medical-related devices and equipment, we are iso 13485 certified and GMP certified.

Medical-grade silicone, EPDM, FKM, and FFKM elastomer options
USP Class VI, ISO 10993, FDA-compliant and ISO 13485 documentation when required
ISO Class 8 Cleanroom production support

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Custom Medical O ring and medical silicone sealing rings

What Is A Medical O Ring?

A medical O-ring seals a joint in a medical device by compressing within a groove. It helps prevent air or fluid from leaking through the connection, whether the device is in use or undergoing cleaning.

Matching the inner diameter and cross-section is only the start of medical O-ring design. The material must retain its sealing force after exposure to the working fluid and specified sterilization cycle. Surface quality and clean handling also need to meet the device's requirements, with records to support acceptance.

Fecision supports Medical O ring projects from early material review to LSR injection molding, clean handling and inspection.

Medical silicone seals and O-rings for device assemblies

Medical O Ring Compliance

Medical O-ring programs often need material records and manufacturing controls in addition to sealing performance. Fecision can align the production plan with the documentation target of the device project.

USP Class VI Options Material grades can be reviewed for USP Class VI biological reactivity documentation when the device application requires it.

FDA And ISO 10993 Review FDA-compliant material options and ISO 10993 biocompatibility documentation can be checked according to project use and contact risk.

Cleanroom Production ISO Class 8 cleanroom handling can support Medical O ring projects that need controlled particle exposure and clean packaging.

Metal-Detectable Compounds Metal-detectable elastomer compounds can be reviewed when risk controls require detection in sensitive processing or device workflows.

Medical O Ring Applications

Medical O-rings are used where a small seal has a large effect on air control, liquid containment, medication delivery, device assembly, and cleaning durability.

Respiratory Equipment

O-rings for oxygen systems, mask assemblies, ventilator interfaces, breathing circuits, valves, and airflow connectors.

Drug Delivery Devices

Seals for injection access, dosing mechanisms, reservoirs, medication-contact components, and controlled delivery assemblies.

Medical Valves And Pumps

Elastic sealing around valve seats, pump chambers, pressure interfaces, check valves, and compact fluid-control devices.

Cylinders And Connectors

Custom Medical O ring sizes for gas cylinders, quick connectors, threaded interfaces, caps, cartridges, and device housings.

Fluid Transfer Devices

Sealing for fluid transfer sets, diagnostic systems, sampling paths, drainage assemblies, and controlled liquid handling.

General Medical Instruments

O-ring seals for handheld instruments, diagnostic devices, laboratory equipment, housings, reusable fixtures, and clean-contact parts.

Medical O Ring Materials

Medical applications may use silicone, EPDM, FKM, or FFKM grades. Selection starts with compatibility with the contact medium and sterilization process. The compound must then meet the sealing requirements and have suitable documentation for its intended use.

FFKM

Perfluoroelastomer

Selected for harsh chemical exposure, high temperature, aggressive cleaning, and demanding sealing environments where premium resistance is needed.

FKM

Fluoroelastomer

Useful for oils, fuels, many chemicals, and higher-temperature service when the medical device environment includes demanding fluids.

EPDM

Ethylene Propylene

Often reviewed for water, steam, alcohols, and repeated sterilization conditions where oil and hydrocarbon exposure are not the main concern.

Silicone

Medical-grade Silicone

Common for soft contact, flexibility, broad temperature stability, low compression set, and clean molding with medical documentation options.

How To Choose The Right Medical O Ring

A medical O-ring must fit the groove and maintain the required compression after use and sterilization. Select the compound for the contact medium, then confirm the evidence required for device acceptance.

Consider the sterilization method
Steam autoclave, EtO, gamma irradiation, and hydrogen peroxide plasma can affect elastomers differently. Silicone and EPDM are often reviewed for repeated steam sterilization, while every compound should be validated under the real cycle.
Verify chemical compatibility
The material should be checked against medical fluids, disinfectants, cleaning agents, drug formulations, and alcohol solutions. A wrong compound can swell, harden, crack, or fail early.
Confirm regulatory
Depending on the device, the project may require USP Class VI, ISO 10993 biocompatibility documentation, FDA-compliant materials where applicable, and ISO 13485 manufacturing quality controls.

Medical O Ring Design Factors For Reliable Sealing

These points help define the first quote, material review, and tooling plan for a custom Medical O ring.

Design Factor	What To Confirm	Why It Matters
Size and groove	Inside diameter, cross-section, groove width, groove depth, gland fill, and tolerance	Controls squeeze, sealing force, installation stretch, and risk of extrusion or rolling.
Contact media	Air, oxygen, medication, water, disinfectant, alcohol solution, cleaning agent, or mixed exposure	Guides elastomer selection and helps avoid swelling, hardening, or surface degradation.
Sterilization	Steam autoclave, EtO, gamma, hydrogen peroxide plasma, cycle count, and exposure temperature	Different materials age differently under sterilization, so the seal should be validated against the real process.
Operating condition	Pressure, temperature, dynamic movement, compression time, assembly method, and service life	Prevents leakage, compression set, wear, friction, and premature seal failure.
Documentation	USP Class VI, ISO 10993, FDA-compliant material target, ISO 13485 quality workflow, lot records, or change control	Medical device teams often need traceable records before part approval and production release.

Medical O Ring Manufacturing Process

Fecision connects material review, groove feedback, molding route, inspection, and clean packaging before releasing Medical O-ring production.

Material Review

We compare elastomers against the contact medium and sterilization cycle. The selected grade must meet the required hardness and appearance, with documentation suited to the medical program.

Tooling review for custom Medical O ring molding

Groove And Tooling Review

We check how the O-ring fills the groove under compression before sampling. Tooling review then addresses cavity layout and the release method, with particular attention to flash on the sealing surface.

Molding

Medical O-rings can be produced by LSR injection molding or compression molding depending on geometry, material, volume, and tolerance.

Inspection

We inspect dimensions and hardness against the approved specification, then check the sealing surface for defects. Lot identification and packaging are confirmed before release.

Cleanroom Production

Medical O-rings can be molded, handled, inspected, and packed under controlled conditions when the device program requires lower particle exposure, protected surfaces, and traceable release records.

Fecision supports ISO Class 8 cleanroom production, also described as Class 100,000 cleanroom production, for medical silicone rubber seals and related clean-contact elastomer parts.

Quality Control For Custom Medical O-Rings

Medical O-ring quality depends on consistent dimensions, smooth sealing surfaces and clean handling. Fecision can prepare inspection records and project documentation according to the release requirement.

Material traceability and compound verification
Dimensional inspection for inside diameter and tolerance
Hardness, appearance, flash, surface finish checks
Cleanroom handling and packaging review

Medical O-ring inspection and packaging support

Need A Custom Medical O Ring?

Send your drawing, material target, sterilization method, contact media, documentation requirement, and estimated volume. Fecision can review the Medical O ring material and production route before quoting.

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