1. Description of Fire Concealed Sprinkler DN20 ZSTDY-68°

This sprinkler is suitable for places with luxurious decoration and bright appearance, such as high-end hotels, luxury restaurants, shopping malls, entertainment centers, etc. It can also be installed in areas with high pedestrian traffic, frequent goods handling, where exposed sprinklers may be easily bumped, or where accidental activation due to human factors needs to be avoided.

Product Standard: GB5135.1 "Automatic Sprinkler Systems — Part 1: Sprinklers"

Design Specification: GB50084 "Code for Design of Automatic Sprinkler Systems"

Acceptance Specification: GB50261 "Code for Installation and Acceptance of Automatic Sprinkler Systems"

2. Features of Fire Concealed Sprinkler DN20 ZSTDY-68°

This product consists of a sprinkler, threaded sleeve seat, outer cover seat, and outer cover cap. The sprinkler and threaded sleeve seat are installed together on the pipeline of the network, followed by the installation of the outer cover. The outer cover seat and outer cover cap are welded together with fusible alloy. In the event of a fire, when the ambient temperature rises to the melting point of the fusible alloy, the outer cover cap automatically falls off. As the temperature continues to rise, the sprinkler's activation element inside the cover activates, thereby opening the sprinkler to automatically discharge water.

3. Technical Performance of Fire Concealed Sprinkler DN20 ZSTDY-68°

(1) Nominal Diameter: Φ15mm; Connection Thread: R23/4″

(2) Flow Coefficient: K=115

(3) Rated Working Pressure: 1.2MPa

(4) Installation Method: Pendant

(5) Sensitivity: Φ3mm (Quick Response)