1. What is a Door Closer?
A door closer is a door mechanical device that automatically closes a door after it has been opened. It controls the speed and force of closing to ensure the door shuts safely and securely without slamming.
2. Why Choose a Door Closer for Doors?
Using a door closer offers several benefits:
Safety: Prevents injuries from doors slamming.
Security: Ensures doors close and lock automatically.
Fire Protection: Fire doors need to close automatically to contain fire and smoke.
Energy Efficiency: Keeps air-conditioned or heated spaces sealed.
3. Door Closer Applications
Door closers are used in various settings:
Commercial: Office doors, retail entrances, supermarket, library, hospitals.
Fire-Rated Doors: Required on fire exit door, stairwell doors, and other fire-rated doors.
High Traffic Areas: Airports, shopping malls, schools.
4. Types of Door Closers
Door closers are categorized by their mounting type, mechanism, and functionality:
By Mounting:
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Surface-mounted: Most common, mounted on the door or frame.
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Concealed/Hidden: hiddern itself within the door and frame,make door look clean
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Floor-spring: Installed in the floor, often for heavy doors or glass doors.
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Overhead Concealed: Hidden in the lintel, commonly in commercial buildings.
By Mechanism:
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Hydraulic: Uses fluid to control the closing speed.
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Mechanical/Spring: Simple spring mechanism (less common now).
Special Features:
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Adjustable speed: Can set the closing and latching speed.
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Hold-open feature: Door stays open at a set angle.
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Delayed action: Slower closing for accessibility (for disabled people).
5. Fire Regulations for Fireproof Door Closers
Fire doors must close automatically to prevent the spread of fire and smoke. Regulations vary by country, but general requirements include:
Automatic Closing: Fire doors must have a self-closing device.
Certification: Door closers must be fire-rated, tested to withstand high temperatures.
Maintenance: Door closers must be inspected regularly to ensure functionality.
Compliance Standards: Examples:
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EN 1154 – European standard for door closers (performance & fire resistance).
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UL 10C – U.S. standard for positive pressure fire tests.
6. Cycle Performance / Grade for Door Closers
The cycle performance indicates how many times a door closer can operate reliably before failure.
EN 1154 Grades:
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Grade 1: ≤50,000 cycles (light duty)
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Grade 2: ≤100,000 cycles (medium duty)
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Grade 3: ≤200,000 cycles (heavy duty)
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Grade 4: ≤500,000 cycles (extra heavy duty, for high traffic areas)
Metal finishs & Polishing
Shipping by air
For door and hardware samples, we usually use air freight to save time, we have a long term cooperation with many international express companies, such as DHL, FEDEX; so they give us competitive shipping price and high quality service.
Shipping by sea
Due to the large volume and weight of the door, usually use sea transportation, our factory is located in Yongkang City, Zhejiang Province, China, the nearest port is the port of Ningbo, followed by the port of Shanghai; from the factory to the port in just 3 hours; sea transportation is very convenient; our factory has more than 20 years of experience in exports; and many shipping companies have long-term cooperation
Shipping by truck
If foreign customers have containers for consolidation in China, we can transport your door by truck to the customer's designated loading location, such as Shenzhen, Qingdao, Shanghai
