![]() Sprinkler Wet type station is a valve set with water contained in the top and bottom chamber. The main classification of sprinkler valve assemblies is the following: The main purpose of the sprinkler valve set is to signalise the activation of the sprinkler system. Sprinkler heads classified according to the activation temperature:ĥ7☌ (orange bulb), 68☌ (red bulb), 79☌ (yellow bulb), 93☌ (green bulb), 141☌ (blue bulb), 182☌ (light purple bulb), 260☌ (black bulb).Īpart from the previously mentioned types, there are other types of closely specialised spray nozzles, such as: dry pendent sprinkler head (the head installed in the areas subject to freezing temperatures connected to the deluge sprinkler network), twin sprinkler head (twin head which releases water only when both bulbs are actuated), in-rack sprinkler heads (heads with a fitted deflector for mounting in the shelving) etc. ![]() The K-factor is defined with the following formula: Sprinkler heads classified according to the K factor (quantity of water supplied by the spray nozzle): Sprinkler heads with the RTI factor higher than 50 and below 80 are called special response and are not classified under the NFPA standard they are occasionally used in Europe Standard response (RTI>80) i quick response (RTI80) and quick response (RTI<50) Sprinkler heads classified according to the response time index (RTI factor) to: Upright, pendent (ceiling mounted), sidewall and horizontal sidewall ![]() Sprinkler heads classified according to the direction of mounting: Spray, flat spray (flat jet spray nozzle), concealed spray nozzle and sidewall spray nozzle Sprinkler heads classified according to the type of deflector: The water spray is dispersed through the deflector of the sprinkler head creating a parabolic water spray. If the temperature rises by more than 30☌ relative to the ambient temperature, the sprinkler head fusible link or bulb trips thus allowing the water spray to eject the plug. The main components of sprinkler systems comprise: sprinkler heads and piping, sprinkler valve set and the sprinkler system water supply.Įach sprinkler head consists of the deflector, fusible link or bulb, plug and the sprinkler head frame.
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