Chinese wholesale 5mm 57℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong

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Our target should be to consolidate and enhance the top quality and service of current goods, in the meantime frequently create new products to satisfy diverse customers' calls for for Fire Fighting Water Pendent Sprinkler, Fire Sprinkler System, Fire Fighting Sprinkler, Currently, we are wanting ahead to even bigger cooperation with abroad customers according to mutual positive aspects. Be sure to sense free to contact us for more details.
Chinese wholesale 5mm 57℃ 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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Chinese wholesale 5mm 57℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong detail pictures

Chinese wholesale 5mm 57℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong detail pictures

Chinese wholesale 5mm 57℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong detail pictures

Chinese wholesale 5mm 57℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong detail pictures


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The key to our success is Good Product Quality, Reasonable Value and Efficient Service for Chinese wholesale 5mm 57℃ Bulb - 3mm Fast response sprinkler bulbs – Zhurong , The product will supply to all over the world, such as: Chicago, Rwanda, Swaziland, With more and more Chinese products and solutions around the world, our international business is developing rapidly and economic indicators big increase year by year. We have enough confidence to supply you both better solutions and service, because we've been more and more powerful, specialist and experience in domestic and international.
  • Problems can be quickly and effectively resolved, it is worth to be trust and working together.
    5 Stars By Cornelia from Lesotho - 2018.09.12 17:18
    In our cooperated wholesalers, this company has the best quality and reasonable price, they are our first choice.
    5 Stars By Claire from Ukraine - 2018.05.15 10:52
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