Door Closer Manufacturer for Commercial & Fire-Rated Doors
OUBAO is a China-based door closer manufacturer and OEM/ODM partner for door hardware brands, distributors, and project contractors worldwide. We produce more than 6 million door closers a year across surface-mounted, cam-action, concealed, and guide-rail series — all built to international fire and durability standards including CE, UL, ANSI/BHMA Grade 1, and Warringtonfire Certifire.
A door closer supplier global brands can build on
Many door closer suppliers can offer one certificate and a catalog. OUBAO offers a fully integrated factory, an accredited test laboratory, and the multi-market certification that lets you sell one product line into Europe, North America, and fire-rated markets at once.
Standards-drafting authority
OUBAO is a national and industry standards drafting organization for door control hardware, with 150+ patents and a dedicated R&D team — we help write the rules our category is judged by.
Vertically integrated factory
Every step is in-house, from die-casting to painting, across a 106,000 m² base. That means tighter quality control, genuine customization, and a reliable 30-day lead time.
Full multi-market certification
CE, UKCA, UL, ANSI/BHMA Grade 1, and Warringtonfire Certifire — all held in-house, all with valid third-party test reports available before you order.
Accredited in-house lab
Our CNAS-accredited laboratory (L5688) runs comprehensive door closer endurance tests on site, validating performance to 2 million cycles instead of relying on outside claims.
5-year warranty & traceable quality
A 6S quality management system gives every order full traceability, backed by a 5-year warranty on every unit — the documentation your compliance and customs teams ask for.
OEM/ODM from MOQ 300
Start a private-label door closer program from just 300 sets, with no separate MOQ for standard versus custom orders, and scale to brand-level volume on the same line.
A 106,000 m² vertically integrated facility — die-casting, assembly, and painting all under one roof.
About Our Factory →Need certification reports or factory documentation to qualify a new supplier?
Request Documents →Door Closer Product Types
Browse by certification standard or product type. Each category links to the full product listing on oubao.com with specifications, certifications, and quotation options.
CE Certificate
European conformity certified door closers tested to 500,000 cycles with fire resistance up to 120 minutes.
- EN 1154 compliant power-size coverage
- CE marked for EU market access
UL Certificate
UL and UL10.C listed door closers for the North American market, with fire ratings up to 180 minutes (3 hr).
- UL & UL10.C certification
- Fire-rated up to 180 minutes
ANSI/BHMA Standard
Grade 1 door closers built to ANSI/BHMA A156.4 standards, validated to 1,500,000 cycles for heavy commercial use.
- ANSI/BHMA Grade 1 certified
- 1,500,000 cycle durability
Warringtonfire Certifire
Third-party fire-tested door closers with Warringtonfire Certifire certification for UK and global fire-door projects.
- Warringtonfire Certifire certified
- Fire-rated up to 120 minutes
Concealed Door Closer
Invisible overhead and in-frame door closers for premium architectural interiors where aesthetics matter.
- Hidden within door or frame
- Fire-rated options up to 180 min
Cam Action Door Closer
Heart-shaped cam design delivering low opening resistance for barrier-free, accessible, and inclusive environments.
- Reduced opening force for accessibility
- Optional hold-open arm available
Need help choosing the right certification or product type for your market?
Ask Our Engineers →Door Closer Series Comparison
A quick reference for matching the right OUBAO series to your project. All series support fire-rated variants and full power-size coverage; final specifications are confirmed per order.
| Series | Mounting | EN Power Size | Best For | Fire-Rated | Tested Cycles |
|---|---|---|---|---|---|
| Surface-Mounted | Door or frame, exposed arm | EN 2–6 | Commercial & high-traffic doors | Up to 180 min | Up to 2,000,000 |
| Cam Action | Surface, slide arm | EN 2–5 | Accessibility & barrier-free entry | Up to 120 min | Up to 1,500,000 |
| Concealed | In-door / in-frame, hidden | EN 2–4 | Premium & architectural interiors | Up to 180 min | Up to 1,500,000 |
| Guide Rail | Surface, slide track | EN 2–5 | Modern commercial interiors | Up to 120 min | Up to 1,500,000 |
Operating temperature range: −40°C to 60°C across all series. Finishes and exact ratings confirmed at quotation.
Key Features & Technical Advantages
Every OUBAO door closer is designed to perform consistently over its full service life — tested in our own laboratory, not just on a spec sheet.
Smooth, controlled closing
Consistent action across the full swing, with independently adjustable closing and latching speed.
Full EN power-size coverage
Whatever closing force a door specification calls for, we build it — from light interior doors to heavy fire doors.
Durable hydraulic system
Engineered against pressure loss and force drift, so closing performance holds steady over years of use.
Leak-resistant, temperature-stable
Pistons operate reliably from −40°C to 60°C with no seasonal oil weeping — ready for hot and cold climates.
High-cycle durability
Validated to 2 million open-and-close cycles in our CNAS-accredited lab for the most demanding entrances.
Fire-door compatible
Certified up to 180 minutes (UL) and 120 minutes (CE, Certifire) for code-compliant fire-door assemblies.
Performance you can verify
OUBAO operates an in-house, CNAS-accredited testing laboratory (L5688) with dedicated door closer endurance benches. Instead of relying on third-party claims, every series is cycle-tested, temperature-tested, and fire-tested under controlled conditions before it reaches your market.
That gives your brand traceable, defensible performance data — the kind of evidence that wins regulated tenders and protects you in the field.
Inside Our Lab →Certifications & Standards
OUBAO door closers carry the certifications international procurement actually requires — each backed by valid, verifiable third-party test reports available before you order.
We supply complete certificate packs and test reports for customs and fire authorities.
Download Certificates →Applications
Engineered for the doors your customers specify every day, across commercial, residential, and life-safety projects.
OEM Door Closer Solutions
OUBAO is the factory behind the brand. We already manufacture to the certification and quality standards leading hardware brands rely on — with a low entry point and a clearly structured path from your first RFQ to mass production.
Tell us your market needs
Share your specifications, target standard, and volume for a tailored proposal.
Get prototypes fast
Receive samples to evaluate and refine your design before committing.
Pass global safety standards
We confirm your product meets CE, UL, ANSI, or Certifire requirements.
Mass production & delivery
Move from prototype to volume with a reliable 30-day standard lead time.
Launch & scale
Grow your brand on the same line, from MOQ 300 sets to full production.
What we customize
- Branded housing: steel-stamped logo (tooling) and silk-screen printing.
- Private label: your brand and your own model numbers.
- Packaging: custom manuals, color boxes, and gift packaging.
- Finishes & colors: silver, white, bronze, black, or any color matched to your color card.
- Specification: EN power size, arm type, and fire rating to your spec.
- Project development: tailored solutions for tenders, delivered in 35–45 days.
A 6S-managed operation with full order traceability and a reliable 30-day standard lead time.
See Our Capabilities →Tell us your target market and certification — we'll recommend the right base model to private-label.
Start an OEM Project →Frequently Asked Questions
What is an OEM door closer?
Can you provide custom branding?
Which certifications do your door closers have?
What door types are compatible?
What is your MOQ and lead time?
How durable are OUBAO door closers?
Build your door closer line with OUBAO
From a single RFQ to brand-level production — certified, traceable, and delivered on time. Send your specifications and target market for a tailored quote.
Get a Quote →