20th century 70's and 80's warehouse to protect the development
Big drop type fire control sprinkler heads for special applications
The first warehouse specifically developed for the protection of sprinkler head is a large drop sprinkler head, the sprinkler head was developed in the 20th century 70's, K coefficient is 161, its splash plate is designed to produce more large drops enhance the penetration and improve fire fighting performance. System design sprinkler head 15 can only meet the design requirements and safety coefficient is greatly enhanced. As developed this sprinkler head, the experts found that the warehouse for high risk, the measure of performance is the sprinkler sprinkler head nozzle size and caliber of work pressure and role, rather than water density area. Large drop sprinkler head is a significant advantage of the sprinkler head can be protected without the need for shelf storage shelves within the sprinkler head, sprinkler nozzle for the ordinary this is not possible.
? ESFR sprinkler head 80s in the 20th century, with the FM model developed ESFR sprinkler heads, storage protection has reached a new level. In order to protect high-risk items used to store high-shelf storage, but do not use the shelves within the sprinkler head, while on the shelf to avoid mechanical damage within the sprinkler head, in particular, developed SM technology. With enhanced performance of ESFR sprinkler head, there has been a new and more rigorous use and installation requirements. Although the users and designers know that you can no longer use a shelf within the sprinkler head, but often neglect the more stringent installation requirements, the resulting problems have also plagued the storage industry.
New sprinkler head technology Until the 20th century, the early 90s for most of the sprinkler head storage technology to protect the most important changes are driven by the FM. 50 years in the 20th century they developed a standard sprinkler head, but also a large drop and ESFR sprinkler head of the developer. By policyholders in their efforts to meet the needs of mainly large-scale industrial operation. Then, by the Central Company (now Tyco fire equipment company) led sprinkler head needs of the user industry began its research and development.
Large caliber (ELO) fire control water jet strength / function area of sprinkler heads
ELO sprinkler head start is the central D64-type sprinkler heads. It was designed to use only one K161 sprinkler head, which can be generated under high water pressure in the lower water density, more cost-effective. In order to validate its performance, in the 20th century, the early 90s was an entity fires pilot projects. The basic process of this project is the original pilot project to repeat the warehouse, the only change is replaced by ELO sprinkler head, and at a lower injection pressure have the same density. In these experiments, ELO sprinkler head and the old sprinkler head not only play the same performance, but in addition to one of the tests are clearly better than the performance. In the design of the new warehouse protection, or no real reason to use K115 smaller sprinkler head, NFPA13 required density 14mm/min (0.34gpm/ft2) or higher, or greater use of K11.2 sprinkler head, illustrates this point.
Large-caliber special application type fire control sprinkler heads
Central has developed UltraK17 sprinkler head in order to lower the required pressure to achieve significant and large drop sprinkler head performance. FM carried out by entities in the fire test, the sprinkler head to protect the carton piled up on the shelves of plastic materials within the warehouse shelf without the need for sprinkler heads.
Large diameter hanging-type sprinkler head
As demands for higher pressure, the original K202ESFR sprinkler head is often difficult to bring the design, so central in the development of the K363 FM sprinkler head.