What is the required endurance life of a concealed door closer under this standard?

The closer must successfully complete 500,000 opening and closing cycles without failure or significant loss of performance (Clause 7.5).

How are concealed door closers sized?

They are categorized into four sizes (Size 1 to 4) based on the maximum permissible mass of the door leaf (e.g., Size 1 for up to 25 kg, Size 4 for up to 80 kg) as per Table 1.

What is the corrosion resistance requirement?

The door closer's protective coating must withstand a 96-hour neutral salt spray test without showing signs of corrosion that would affect its function (Clause 7.6).

Is the closing speed adjustable?

Yes, the closing time from a 90-degree open position must be adjustable between 3 and 30 seconds (Clause 7.2).

IS 14912

: 2001

Door Closers, Concealed Type (Hydraulically Regulated)

CurrentSpecializedSpecificationBIMArchitectural · Builder Hardware

Download PDF BIS Portal Google

This standard specifies the requirements for hydraulically regulated concealed type door closers. It covers materials, dimensions, manufacture, performance criteria like endurance and efficiency, and methods of testing for different sizes of closers.

Door Closers, Concealed Type (Hydraulically Regulated)

Quick Reference Values

Minimum endurance test cycles500,000 cycles

Adjustable closing time (from 90°)3 to 30 seconds

Minimum thermal stability range-10°C to 50°C

Neutral salt spray test duration96 hours

Minimum efficiency60 percent

Practical Notes

Ensure the closer size is correctly matched with the door's weight and width as per Table 1 to ensure proper functioning and prevent damage.

Concealed closers require precise morticing in the door leaf or frame; it is crucial to coordinate with the door manufacturer for factory preparation.

During installation, verify that the two-stage closing action (main closing and final latching) is correctly adjusted for both safety and security.