Fusible Alloy Fire Sprinkler K80 K115
Heat-activated alloy link provides reliable sprinkler operation without a glass bulb.
Available in K80 and K115 to meet different project requirements.
Upright, pendent and horizontal sidewall options.
Reduces the load on the heat-sensitive alloy and provides a degree of shock tolerance.
Suitable for underground garages, tunnels, logistics parks and industrial facilities.
Description
Ca-Fire Protection Co.,Ltd is one of the most credible manufacturers and suppliers of fusible alloy fire sprinkler k80 k115 in China. Welcome to wholesale custom made fire equipment products at competitive price from our factory. Contact us for more cheap products.
Products Description
A fusible-link thermal-activation sprinkler, the alternative to the glass bulb type. A lever design reduces the load on the heat-sensitive alloy, giving shock tolerance and dependable low-temperature performance in garages, tunnels and logistics parks.
K80 / K115 Flow coefficient
72 / 74 °C Nominal operating temp
3 types Upright · pendent · sidewall
OVERVIEW
|
Parameter |
Specification |
|---|---|
|
Heat-Sensitive Element |
Fusible Alloy |
|
Flow Coefficient |
K=80 / K=115 |
|
RTI |
80–360 (m·s)⁰·⁵ |
|
Minimum Applicable Temperature |
4°C |
|
Installation |
Upright / Pendent / Sidewall |
The fusible alloy sprinkler is another thermal-activation form alongside the glass bulb type. It uses the lever principle to reduce the force borne by the heat-sensitive alloy.
The elasticity of the lever parts gives the sprinkler a degree of shock resistance, and the solid state of the alloy link gives it better performance at low temperatures.
It is applied in underground garages, metro tunnels, logistics parks and similar places.
FEATURES
Lever principle
The lever arrangement reduces the load on the heat-sensitive alloy.
Shock tolerance
Elastic lever parts give the sprinkler a degree of resistance to shock.
Low-temperature performance
The solid alloy state performs better in low temperatures; minimum applicable temperature is 4 °C.
Two flow coefficients
K=80 with R1/2 thread and K=115 with R3/4 thread.
Three installation types
Upright, pendent and horizontal sidewall to suit the ceiling and wall layout.
Wide RTI range
Response time index from 80 to 360 (m·s)0.5.
MODELS
ZSTZ 80-72°C Y
72 °C nominal operating temperature, R1/2 thread.
ZSTX 80-72°C Y
72 °C nominal operating temperature, R1/2 thread.
ZSTBS 80-72°C Y
72 °C nominal operating temperature, R1/2 thread.
ZSTZ 115-74°C Y
74 °C nominal operating temperature, R3/4 thread.
ZSTX 115-74°C Y
74 °C nominal operating temperature, R3/4 thread.
ZSTBS 115-74°C Y
74 °C nominal operating temperature, R3/4 thread.
HOW IT WORKS
Heat reaches the link
Hot gases from a fire rise to the sprinkler and heat the fusible alloy element.
01
Alloy softens
At the nominal operating temperature (72 °C or 74 °C) the alloy gives way.
02
Lever releases
The lever parts fall away and the seal is released.
03
Water discharges
Water flows from the opened sprinkler onto the deflector and is distributed over the fire area.
04
SPECIFICATIONS
| Flow coefficient | Nominal operating temp | Min. operating temp | Max. ambient temp | Thread | Heat-sensitive element | Min. applicable temp | RTI (m·s)0.5 | Installation |
|---|---|---|---|---|---|---|---|---|
| K=80 | 72 °C | 69 °C | 42 °C | R1/2 | Fusible alloy | 4 °C | 80–360 | Upright / pendent / horizontal sidewall |
| K=115 | 74 °C | 71 °C | 44 °C | R3/4 |
FAQ
Q: How does a fusible alloy sprinkler differ from a glass bulb sprinkler?
A: Both are thermal-activation types. The fusible alloy type uses a lever to reduce the load on the alloy, and its elastic lever parts give some shock tolerance, while the solid alloy state performs better in low temperatures.
Q: How do I choose between K=80 and K=115?
A: K=80 has a 72 °C nominal temperature and R1/2 thread; K=115 has 74 °C and R3/4 thread. Select the flow coefficient from your project's hydraulic design.
Q: What do ZSTZ, ZSTX and ZSTBS mean?
A: They are the three installation types: upright, pendent and horizontal sidewall. The number is the flow coefficient K and the temperature is the nominal operating temperature, for example ZSTZ 80-72 °C Y.
Q: What temperature limits apply?
A: K=80: operates from 69 °C, maximum ambient 42 °C. K=115: operates from 71 °C, maximum ambient 44 °C. The minimum applicable temperature is 4 °C for both.
Q: Where is it typically installed?
A: Underground garages, metro tunnels and logistics parks, among similar places.
Our address
NO.8, YUANFENG ROAD, MEIYUAN VILLAGE, KANGMEI TOWN, NANAN CITY, QUANZHOU CITY, FUJIAN CHINA
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