- published: 28 Aug 2012
- views: 56331
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.
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
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
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 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
Training dry sprinkler system step by step procedure
DSPA aerosol generators consists of a solid compound made of a mixture of potassium nitrate, an organic resin and dicyandiamide in a rigid steel casing which aerosolize finely divided 70% solid particles typically based on alkali metal salts and 30% gases typically comprised of nitrogen, carbon dioxide and minor amount of water vapor.