The scope is limited to manually operated door closing devices where the energy for closing is generated by the user upon opening the door, such that when the door is released, it returns to a closed position, in a controlled manner. Devices such as spring hinges, which do not exert a checking control during door closing, are outside the scope of this standard. Door closing devices (door closers) manufactured in accordance with this standard are recommended for use wherever there is a requirement for reliable closing control of a door.

Test Requirement 测试要求：

Marking
Requirements concerning product information
Workmanship
Durability
Closing moment
Opening moment
Efficiency
Closing time
Angles of operation
Overload performance
Temperature dependence
Fluid leakage
Latch control (optional)
Backcheck (optional)
Delayed closing (optional)
Adjustable closing force (optional)
Zero position performance (for double action door closers only)
Corrosion resistance
Additional requirements for a door closer intended for use on fire/smoke door assemblies

Sample Size 样品数量 / 送样规格: 6pcs
Lead Time / TAT (Turn Around Time) 测试周期: 常规服务 Regular service 35 working days

Report Summary 报告摘要: