1. Description of 93°C/DN15 Fire Sprinkler Head (Upright Type)

The ZSTZ upright glass bulb closed sprinkler head is a critical component in automatic fire sprinkler systems, serving as an instrument to detect fires and control or extinguish them through automatic water discharge. It is suitable for use in environments with temperatures not lower than 4°C and not higher than 70°C, and is applied in wet pipe systems for light to moderate hazard buildings such as hotels, shopping malls, restaurants, entertainment venues, warehouses, hospitals, factories, airports, and basements.

Product standard reference: GB5135.1—2003 "Automatic Fire Sprinkler Systems—Part 1: Sprinkler Heads"

2. Working Principle of 93°C/DN15 Fire Sprinkler Head (Upright Type)

The working principle of this series of glass bulb sprinkler heads relies on a glass bulb filled with an organic solution that has a high thermal expansion coefficient as the thermal sensing element. At room temperature, the glass bulb shell can withstand a certain supporting force to ensure nozzle sealing. When a fire occurs and the temperature rises, the organic solution inside the glass bulb expands thermally, generating high internal pressure until the glass bulb shell breaks, thereby activating the sprinkler head to discharge water.

3. Structural Features of 93°C/DN15 Fire Sprinkler Head (Upright Type)

This series of glass bulb sprinkler heads is assembled from a copper alloy frame, glass bulb, sealing components, glass bulb seat, set screw, and deflector. It features a compact structure and an elegant, aesthetically pleasing appearance.

3.1. The sprinkler frame is precision-forged from high-strength copper alloy, offering excellent strength and corrosion resistance.

3.2. The thermal sensing element (glass bulb) uses high-quality domestic and international products, ensuring high strength, reliable operation, and fast response.

3.3. This series of glass bulb sprinkler heads has been tested by the National Center for Quality Supervision and Testing of Fixed Firefighting Systems and Fire-Resistant Components and complies with all provisions of the national standard GB5135.1-2003 "Automatic Fire Sprinkler Systems—Part 1: Sprinkler Heads".

4. Technical Characteristics and Model Specifications of 93°C/DN15 Fire Sprinkler Head (Upright Type):

4.1. Nominal diameter: φ15mm, Connection thread: R1/2″, Flow coefficient: K=80±4.

4.2. Nominal diameter: φ20mm, Connection thread: R3/4″, Flow coefficient: K=115±9.

4.3. Rated working pressure: 1.2MPa, Factory test pressure: 3.0MPa.

4.4. Glass bulb diameter: φ3mm, φ5mm.

4.5. Sprinkler rated temperature and color code: