Zhejiang, China
Business Type:
Trading Company
Business Range:
Manufacturing & Processing Machinery, Security & Protection
Management System Certification:
ISO 9001, ISO 14064
OEM/ODM Availability:
Yes
OEM/ODM Service
Sample Available

Zstdy Concealed Fire Sprinkler Types of, Concealed Fire Sprinkler, Types of Fire Sprinkler Heads manufacturer / supplier in China, offering Zstdy Concealed Fire Sprinkler, Types of Fire Sprinkler Heads, 10gauge Bleach White Black PVC DOT Cotton Gloves, 10gauge Blench White Blue PVC Wave-DOT Glove and so on.

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Zstdy Concealed Fire Sprinkler, Types of Fire Sprinkler Heads

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Min. Order: 2,000 Pieces
Port: Ningbo, China
Production Capacity: 50000PCS/Year
Payment Terms: L/C, T/T, Western Union
Size: Dn15 Dn20
Material: Brass or Chrome Finished
The Critical Temperature: 68/79/93 Degrees
Style: Pendent
Transport Package: Carton
Specification: CE ISO

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Basic Info

Model NO.
ZSTX15 ZSTX20
Trademark
DSW
Origin
China
HS Code
84819090
Zstdy Concealed Fire Sprinkler, Types of Fire Sprinkler HeadsSpecifications


ZSTDY concealed fire sprinkler, types of fire sprinkler heads
Operating temp.: 68/79 degree
Material: Brass, zinc alloy



ZSTDY concealed fire sprinkler, types of fire sprinkler heads
Pendent fire sprinkler, upright fire sprinkler, sidewall 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.

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