20 Years of Industrial Sealing Excellence
Factory-direct manufacturer for both standard O-rings and custom sealing parts, serving engineers and procurement teams worldwide.
Company Overview
Founded over two decades ago, O-Ring Supply Co. has grown from a specialist sealing components manufacturer into a trusted global supplier for industries where seal failure is not an option. Our factory operates with a single focus: delivering dimensionally accurate, material-certified sealing parts that perform reliably in demanding conditions, whether the requirement is a standard catalog O-ring or a custom-made part built to drawing.
Over 20 years, we have supplied both standard and custom sealing products to hydraulic system builders, chemical processing plants, food and beverage equipment manufacturers, aerospace subcontractors and oil & gas operators across more than 50 countries. Every order - whether 1 piece or 1 million - goes through the same quality process: incoming material verification, dimensional inspection and batch traceability.
We work directly with engineers. When a sealing system fails or a new design requires validation, our technical team provides material recommendations, groove design reviews, compatibility data, and manufacturing feedback for custom projects. We do not just ship parts - we help solve sealing problems.
Manufacturing Capabilities
In-House Compression Molding
Full rubber compression molding capability for standard O-rings, custom O-ring profiles, and drawing-based sealing components. Tooling available for AS568, ISO 3601 and custom dimensions.
Material Testing Laboratory
On-site hardness testing (Shore A), tensile strength measurement, compression set analysis and chemical compatibility verification for every batch.
Custom Size Manufacturing
Any inner diameter and cross-section combination, plus support for special sealing geometries. We manufacture from 1mm cross-section up to large-diameter rings and non-standard parts for industrial flanges and pressure vessels.
Wide Material Range
NBR, FKM, EPDM, VMQ (Silicone), PTFE and FFKM. All compound formulations are fully traceable to raw material certificates.
Low MOQ Production
Production flexibility from single-piece prototypes to multi-million piece annual contracts. No setup fees for standard tooled sizes.
Global Logistics
DHL and FedEx express for urgent orders. Sea freight consolidation for bulk shipments. Export documentation including material certificates and test reports provided.
Certifications & Compliance
ISO 9001:2015
Quality management system certification covering design, production, inspection and delivery of elastomeric sealing components.
RoHS Compliant
All standard compounds are RoHS compliant. Restriction of Hazardous Substances documentation available on request.
REACH Compliant
Material formulations comply with EU REACH regulation. SVHC declarations available for all material grades.
FDA Grade Available
FDA-compliant compounds available in EPDM, VMQ and PTFE for food contact, pharmaceutical and medical device applications.
Why Work With Us
No Minimum Order Quantity
We accept orders starting from a single piece. Whether you need one prototype or one million pieces, we deliver the same attention to quality.
Standard and Custom Production
We support daily repeat orders for standard AS568 and ISO 3601 sizes, while also handling custom dimensions, special profiles, and drawing-based sealing projects.
Fast Lead Times
Standard delivery is 7-15 days. Express manufacturing available in 3-5 days for critical downtime situations.
Engineering Support
Our in-house engineers assist with material selection, groove design, and failure analysis at no extra cost.
Frequently Asked Questions
Where is your factory located?
Our manufacturing facility is based in China. We ship directly from the factory to customers worldwide, eliminating distributor markups and reducing lead times.
Do you provide material test certificates?
Yes. Material test certificates, hardness test reports and dimensional inspection reports are available for all orders. REACH and RoHS declarations are provided on request.
Can you supply O-rings for food and pharmaceutical applications?
Yes. We supply FDA-compliant O-rings in EPDM, VMQ (Silicone) and PTFE. USP Class VI silicone is available for pharmaceutical and medical device applications.
What industries do you serve?
We serve hydraulics, oil & gas, chemical processing, food & beverage, pharmaceutical, aerospace, automotive, marine and general industrial sectors.
Do you handle both standard and custom sealing parts?
Yes. Standard AS568 and ISO 3601 sizes are part of our daily production, and we also support custom dimensions, drawing-based sealing parts, and special profiles for OEM and replacement projects.
How do I request a sample?
Contact us via email or WhatsApp with your required material, size and standard. We will confirm sample availability and shipping cost within 24 hours.
Talk to our team
For standard part pricing, custom drawings, or material recommendations, contact us directly. Phone/WhatsApp: +86 138 1403 4409 | Email: yaoqingpu1983@gmail.com