2022 High quality 3mm 79℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong

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Innovation, good quality and reliability are the core values of our enterprise. These principles today extra than ever form the basis of our success as an internationally active mid-size organization for Automatic Fire Sprinkler Nozzle, All Types Of Zst Sprinkler Heads, Quick Response Fire Sprinkler, We take quality as the foundation of our success. Thus, we focus on the manufacture of the best quality products. A strict quality management system has been created to ensure the quality of the products.
2022 High quality 3mm 79℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong Detail:

Size(mm) Temperature Rating (℃/°F) Color
A 2.4 68℃ / 155°F red
B 1.5 79℃ / 175°F yellow
C <4.2 93℃ / 200°F green
D 3±0.1 141℃ / 286°F blue
d1 3.5±0.4
d2 3.5±0.3
L 23±0.5
l1 20±0.4
l2 19.8±0.4
Glass bulb load(N) Average Cursh load(X) 3600
lower Tolerance Limit(TL) ≥1600
aximum clamping torque 6.5 N·cm
Response time index(m*s)0.5 RTI≤50

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The printed text on 3mm sprinkler bulb is “ZJCY”. Compared with 5mm sprinkler bulb, its response will be faster, RTI ≤ 50, where RTI is a coefficient measured under standard conditions to measure the sensitivity of sprinkler bulb. Expressions:RTI= τ u ½

Where: RTI – response time coefficient, unit (m * s) ½;
τ- Response time constant, in S;
u – gas flow rate, unit: M / s
The quality of the sprinkler bulb fully complies with the Chinese national standard GB18428-2010. The diameter of the sprinkler bulb is 3mm, and the deviation from the nominal diameter will not exceed ± 0.1mm; Its length is 23mm and the deviation from the nominal length will not exceed 0.5mm.
The average crushing load of the sprinkler bulb is 3600n. During the test, the sprinkler bulb will be fixed between the supporting elements in an appropriate way, and the supporting elements are made of steel. The Rockwell hardness is (44 ± 6) HRC, which meets the corresponding service requirements. Then, apply a uniform load along the axis of the sprinkler bulb until the sprinkler bulb bursts, and the rate of load increase is (250 ± 25) n / s. The maximum deviation of the equipment used to measure the crushing load shall not exceed ± 1% of the measured value. Use multiple groups of measured data to calculate the average value and standard deviation of the crushing load and judge whether the results meet the specified standards.


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2022 High quality 3mm 79℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong detail pictures

2022 High quality 3mm 79℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong detail pictures

2022 High quality 3mm 79℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong detail pictures

2022 High quality 3mm 79℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong detail pictures


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Our merchandise are broadly identified and trusted by end users and can satisfy continually developing economic and social requires for 2022 High quality 3mm 79℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong , The product will supply to all over the world, such as: Slovakia, Orlando, luzern, Our team knows well the market demands in different countries, and is capable of supplying suitable quality products and solutions at the best prices to different markets. Our company has already set up a experienced, creative and responsible team to develop clients with the multi-win principle.
  • The enterprise has a strong capital and competitive power, product is sufficient, reliable, so we have no worries on cooperating with them.
    5 Stars By Agnes from Yemen - 2018.09.08 17:09
    Sales manager is very enthusiastic and professional, gave us a great concessions and product quality is very good,thank you very much!
    5 Stars By Julia from Georgia - 2018.06.05 13:10
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