1.Description
The dry-type sprinkler is designed with stainless steel internals, mainly for dry or pre-action systems, and where sprinklers or partial sprinklers are exposed to freezing conditions, or seasonal decommissioning is required to drain the sprinkler system In the antifreeze area, this nozzle can also be used in the vulnerable parts of the wet sprinkler system.
Product standard: GB5135.1 "Automatic sprinkler system Part 1: Sprinkler"
Design Specification: GB50084 "Design Specification for Automatic Sprinkler System"
Acceptance specification: GB50261 "Code for construction and acceptance of automatic sprinkler system"

2.Characteristics
The dry-type sprinkler is composed of a frame assembly, a glass ball, a sealing member, an inner and outer decorative plate, an outer tube, a sealing seat and the like. The dry nozzle in the normal system is in a normal state, and the sealing of the water inlet prevents the water in the system from reaching the dry nozzle piping. When the fire occurs, the glass bulb temperature sensing element is heated and reaches the operating temperature, the glass ball is broken. After that, the base is detached, and the internal mechanism of the dry nozzle is released, so that the water flows out, and the sprinkler is sprinkled to extinguish the fire.

3, technical performance
(1) Nominal diameter: φ15mm; interface thread: R21″
(2) Flow coefficient: K=80
(3) Rated working pressure: 1.2MPa
(4) Installation form: sagging
(5) Sensitivity: Φ3mm (fast response), Φ5mm (special response)
(6) Nozzle rated operating temperature and color standard:

4、Structure diagram

• K-ZSTGX 15-68℃（φ3mmGlass ball）
• T-ZSTGX 15-68℃（φ5mmGlass ball）
• Dry Nozzle 80-68 Q5 Change Inspection Report
• Sprinkler Head K-ZSTGX115-68°C Q3 Type Test Report
• Sprinkler nozzle T-ZSTGX115-68°C Q5 type test report