- published: 28 Aug 2012
- views: 64051
I'm explaining how fire alarm systems work for new technicians or other employees who deal with these systems. This is my 18th video in a string of many Khan Academy-styled lessons. This video introduces how dry sprinkler systems work and how they are monitored by the fire alarm panel.
في بداية الحريق ترتفتع درجة حرارة المكان ويتم تمدد السائل داخل الرشاش لتنكسر زجاج الرشاش ويبدأ الغاز المضغموط في الخروج ليقل الضغط يعمل الضاغط لتعويض الفقدان في ضغط الغاز ولكنه يكون غير كافي وتعمل quick open device علي مساعدة dry pipe valve في سرعة الاستجابه ليفتح المحبس وتمر الميياه في اتجاه الرشاش وتبدأ الجوكي في العمل لتعوض الانخفاض في الضغط لكن تكون غير كافيه فتعمل المضخه الرئيسيه في العمل وبذلك يكون نظام الاطفاء الجاف تم تنشبطه بكل مكوناته
In this video from the Know More Risk series, learn about the arrangement and operating principles of a typical differential pressure dry pipe valve riser. Dry sprinkler systems are used where piping is subject to freezing. Dry systems are more complex than wet systems. To learn more about FM Global learning solutions, visit http://www.fmglobal.com FM Global clients can access additional online training 24/7 at http://training.fmglobal.com
Training dry sprinkler system step by step procedure
An alarm valve prevents a reverse flow of water from the installation into the fire-pump room, but in case a fire sprinkler is activated (opened) due to fire, the alarm valve will open and permit water flow into the system. Alarm valve prevents a reverse flow of water or air pressure from the installation into the fire-pump room. In case a fire sprinkler is activated (opened) due to fire, the alarm valve will open and permit water flow into the system and a pressure switch gives a signal to activate the fire-pump. There are different types of alarm valves that need to match the fire sprinkler installation – wet pipe system, dry pipe system. Deluge system etc. Almost all alarm valves are listed by a listing authority like VdS, FM, UL etc.
This was an epic fail the water pressure was just to much. These sprinklers are meant to be outside. The way a dry fire sprinkler system works is, all of the pipe that is outside is full of compressed air. Then when the pipes get inside they are full of pressured water. It is like this because the water in the pipes could freeze. This was a simple test that mimics a sprinkler head bursting. Follow me on Twitter! https://twitter.com/SER_Safety Thanks! :D ©S.E.R. Safety™ 2015 do not copy with out permission
There's a big fire in the building and suddenly all the sprinklers turn on -- that's not really how works. Let science extinguish this myth. How Fire Burns in Space - http://bit.ly/1OqRB5b Sign Up For The Seeker Newsletter Here - http://bit.ly/1UO1PxI Read More: How do sprinklers work? http://www.firesprinklerinitiative.org/advocacy-tools/fact-sheets/how-sprinklers-work.aspx "Contrary to what many Americans think, we are not at greatest risk from fire in hotels or other public places; it is at home, where most of us feel the safest, that we are actually at highest risk of fire." Sprinkler system types http://wiginton.net/pdf/Wiginton-Fire-Protection.pdf "Wet - Wet type systems are the most common type of sprinkler system that is installed. A wet pipe system has water in th...
The FlameGuard DSPA-5 is a life saving product that can choke a fire in a matter of seconds. It’s an ideal tool for marine use. We’d like to encourage our customers—particularly commercial fishing operations and enterprise fisherman—to purchase the portable FlameGuard DSPA product to assist them in fire suppression at sea or at dockside.
This shows how fire sprinklers work and just how sensitive and fast they operate when heated up. - This head was dropped so it was decided it should not be installed. Thank you Darren for donating this. Cameras: Casio EXF1 Pro (1200 and 600 FPS)
this vedio for to understand dry system
Vancouver Fire Sprinkler System Inspection & Service http://www.bartecfire.com/sprinkler-repair-service/ Sprinklers provide a vital role in protecting a building from fire. When testing a dry sprinkler system, a technician will simulate sprinkler head activation by opening an inspector’s test located at the farthest point of the system. Another technician will observe the activation of the valve in the mechanical room. Once the valve is activated the trip timing and pressures are recorded before the valve is closed and drained. The cover plate can then be removed and the interior of the valve inspected. If the clapper and seat are in good condition and free of debris the valve can be reset and depressurized. The fire alarm panel is checked to confirm alarm and supervisory signals were rec...
In this video from the FM Global Know More Risk series, learn about the basic differences of the four types of water-based sprinkler systems: wet, dry, deluge and preaction. To learn more about FM Global learning solutions, visit http://www.fmglobal.com FM Global clients can access additional online training 24/7 at http://training.fmglobal.com
Replacing dry pendants above freezers with about 12 inches of clearance.
Here is a full trip test on a dry sprinkler system. There are two gauges here. The one on the right is the water gauge, and air on the left. This test is to simulate if a sprinkler head is blown in case of fire. This is a small parkade, so the times will be fast. In a dry sprinkler system the pipes are filled with air instead of water. This is to prevent freezing in the winter months. The device that separates the air and the water is called a dry pipe valve. It is a valve that has a clapper in it that is down when the system is supervised with air. When the air is released, the air pressure drops and eventually the pressure of the air cannot hold down the clapper. At this point the dry pipe valve trips, and water flows into the pipes to put the fire out.
For full installation instructions please refer to the installation manuals available on www.Victaulic.com