Quick Details
Place of Origin: China (Mainland)
Model: ZSTX15 ZSTX20
Size: DN15 DN20
Color: Chrome, white, blue
Type: Pendent
The critical temperature: 68/79/93 Degrees Celsius
Material: Brass or Chrome Finished
Packing: Export design carton
Packaging Details: Cheap fire sprinkler, fire sprinkler parts is wrapped with 200pcs in one carton box in general.
Delivery Detail: Within 15days after payment received
Cheap fire sprinkler, fire sprinkler parts
Pendent fire sprinkler
Style: Pendent
Operating temp.: 68/79 degree, etc
Material: Brass, zinc alloy
Size: 1/2" (15mm) 3/4" (mm)
DEACRIPTION
Each closed-head sprinkler is held closed by either a heat-sensitive glass bulb (see below) or a two-part metal link held together withfusible alloy such as Wood's metal and other alloys with similar compositions. The glass bulb or link applies pressure to a pipe cap which acts as a plug which prevents water from flowing until the ambient temperature around the sprinkler reaches the design activation temperature of the individual sprinkler. Because each sprinkler activates independently when the predetermined heat level is reached, the number of sprinklers that operate is limited to only those near the fire, thereby maximizing the available water pressure over the point of fire origin.
The bulb breaks as a result of the thermal expansion of the liquid inside the bulb. The time it takes before a bulb breaks is dependent on the temperature. Below the design temperature, it does not break, and above the design temperature, it takes less time for higher temperatures. The response time is expressed as a response time index (RTI), which typically has values between 35 and 250 m½ S½ , where a low value indicates a fast response. Under standard testing procedures (135 ° C air at a velocity of 2.5 m/s), a 68 ° C sprinkler bulb will break within 7 to 33 seconds, depending on the RTI. [13] The RTI can also be specified in imperial units, where 1 ft½ S½ Is equivalent to 0.55 m½ S½ . The sensitivity of a sprinkler can be negatively affected if the thermal element has been painted.
Ningbo DSW International Co., Ltd. Established 1998, specialising in producing fire extinguishers, ABC dry powder fire extinguisher, ABC dry chemical fire extinguisher, CO2 fire extinguisher, sprinklers systems, fire hoses, fire hydrant& hose fitting brass die casting.
DSW always keep quality, service and cost as core, it has passed ISO9001 International Quality system and European CE Quality system as well as the test of Union EN-3. In order to ensure hight quality of products, every piece fire extinguishers and accessories pass 15 step test, before every shipment, sending Test report and loading pictures to our customers.
Through the efforts of both Domestic and International sales forces, DSW has emerged as the premier name for fire protection products. 80% of DSW products has been exported to different countries and regions, such as South America, Europe, Asian, Middle East etc.
