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UL Certified Steel Fire Rated Door Viewer Model 4014-70-90-AC with 1.5 Hour Fire Protection

The Oupu Optic UL Steel Door Viewer Model 4014-70-90-AC is a heavy-duty, high-security hardware component certified to meet strict 1.5 Hour fire-resistance standards for exceptionally thick door assemblies. Precision-engineered from high-strength solid steel in a classical antique copper finish and featuring an oversized 32 mm head, this 14 mm tube diameter door viewer provides ultimate thermal endurance and panoramic wide-angle security for doors measuring 70 to 90 mm in thickness.

ul certified steel fire rated door viewer model 4014 70 90 ac with 1.5 hour fire protection

Technical Specifications

ParameterSpecification Details
Model Number4014-70-90-AC
Housing MaterialHigh-Strength Alloy Steel
Tube Diameter14 mm
Door Thickness Range70 mm to 90 mm
Head Diameter32 mm
Standard FinishAC – Antique Copper
UL Fire RatingCertified for 1.5 Hours – 90 Minutes Fire-Resistance
Target ApplicationsUltra-thick armored entryways, heavy insulated fire doors, and high-security commercial panels

Key Benefits & Target Applications

Core Hardware Advantages

  • Verified 1.5 Hour UL Fire Rating: Rigorously tested to withstand furnace conditions for up to 90 minutes, maintaining critical thermal barriers and preventing the escape of heat, smoke, and toxic combustion gases.
  • Ultimate Thickness Capability: Specifically engineered for extreme deep-profile doors measuring 70 mm to 90 mm, providing a secure, flush installation on heavy-duty fire doors without compromising structural compliance.
  • High-Melting-Point Carbon Steel: Engineered from solid alloy steel with a melting point exceeding 1370 degrees, remaining structurally sound under fire-test conditions that cause brass or aluminum viewers to melt.
  • Premium Antique Copper Finish: Electroplated with a rich antique copper layer that resists humidity and corrosion, delivering a classical upscale appearance to high-traffic commercial entries.

Primary Application Environments

  • Heavy Armored Fire Doors: Highly recommended for thick, steel-faced armored security doors and commercial-grade escape routes.
  • Acoustic and Insulated Fire Assemblies: Perfectly suited for deep-profile soundproof doors and thermal-insulated entry systems in commercial buildings.
  • Luxury Hospitality Guest Rooms: Ideal for high-end hotel room entry doors requiring mandatory fire compliance paired with a classic antique copper finish.
  • High-Security Corporate Suites: Specified for executive office partitions and administrative entrance doors requiring robust, certified fire-safety hardware.

Custom Finishes and Accessories

We offer several electroplated finishes to match your project specifications:

Optional Finishes

  • SC: Satin Chrome
  • SN: Satin Nickel
  • PB: Polished Brass
  • CP: Chrome Plated
  • G: Gold Plated
  • AC: Antique Copper – Standard
  • AB: Antique Brass
  • ORB: Oil Rubbed Bronze

Optional Accessories

  • Extension F4014J: Matching steel thread extension tube
  • Cover F4014G: Matching steel privacy cover

B2B Procurement Terms

To support commercial buyers, distributors, and door manufacturing plants, we provide standard export trade terms:

  • Minimum Order Quantity: Please contact our sales department for specific finish and volume requirements.
  • Production Lead Time: Typically 30 to 45 days depending on the batch order size and finishing options.
  • Sample Policy: Physical product samples are available for quality evaluation and thread-fit testing by qualified trade buyers.
  • Incoterms and Port of Loading: FOB Ningbo, Shanghai, or Tianjin.
  • Export Packaging: Shipped in standard industrial packaging. Bulk packing is optimized for easy assembly by door manufacturers and hardware distributors.
  • Technical Drawings and Certifications: We provide 2D and 3D CAD files alongside official UL compliance documentation to engineering teams and door manufacturers.

Manufacturing Capabilities and Certifications

Beijing Oupuoptic Instrument Co., Ltd. began operations in 2001 in Tongzhou District, Beijing. To support large-volume global exports, we established our modern manufacturing facility, Zhejiang Guocheng Technology Co., Ltd., in Zhejiang province in 2019.

Our manufacturing infrastructure and legacy include:

  • A modern production facility covering over 5000 square meters.
  • A workforce of more than 100 professionals.
  • Automated CNC machining, high-precision finishing, and optical assembly lines.
  • Full ISO9001 quality system certification.
  • Direct import and export authorization.

Our optical engineering history:
Our Chairman, Mr. Shao Wencai, is an experienced optical designer who was deeply involved in developing China’s first-generation door viewer in 1978. He patented a 180-degree wide-angle door viewer in 1990, securing a national patent. He later designed a dual-purpose door viewer in 1998, followed by an enhanced optical door viewer system in 2006.

Our specialized steel door viewer series has successfully passed strict UL fire-resistance testing, complying fully with USA and Canadian fire safety standards.

Frequently Asked Questions

Deep-profile fire doors carrying significant structural mass, such as heavy insulated or armored assemblies, accumulate intense heat in a fire. Solid steel prevents the viewer from melting under these massive thermal loads, ensuring no open holes are left for flame or smoke passage.

Yes. Our antique copper electroplating process applies an integrated, corrosion-resistant protective layer over the heavy-duty steel base, which is highly resistant to hand oils, corridor cleaning detergents, and atmospheric moisture.

Yes. Our matching steel extensions Model F4014J and steel privacy covers Model F4014G are manufactured to the same rigorous compliance standards to maintain the fire-safety rating of the entire door assembly.

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