differ between clesd head sprinkler pattern and nozzle spray pattern for the same k factor
differ between clesd head sprinkler pattern and nozzle spray pattern for the same k factor
(OP)
Dear Members,
what is the difference between closed head sprinkler pattern and nozzle spray pattern for the same k factor?
my problem is that i have close head sprinkler network installed for a store and the HJ requested to replace this sprinkler by open head nozzle and when i mad a quick check i found this action can be applied,
the contractor said i cannot be replaced by the nozzles , it must replace the pipes ( even it has the same pressure, flow, and velocity?
i need a justification for the contractor?
your respond to my message is appreciated.
what is the difference between closed head sprinkler pattern and nozzle spray pattern for the same k factor?
my problem is that i have close head sprinkler network installed for a store and the HJ requested to replace this sprinkler by open head nozzle and when i mad a quick check i found this action can be applied,
the contractor said i cannot be replaced by the nozzles , it must replace the pipes ( even it has the same pressure, flow, and velocity?
i need a justification for the contractor?
your respond to my message is appreciated.





RE: differ between clesd head sprinkler pattern and nozzle spray pattern for the same k factor
With open nozzles every nozzle in the system must and shall discharge at the same time. A wet pipe sprinkler system is only designed to have a certain number of sprinklers operate [not less than 5]. Reference NFPA 15.
Nozzles have different spray patterns than standard spray or extended coverage sprinklers. With nozzles you must account for the pressure, angle and k factor along with the density and area to determine the coverage. This shouldn't be an easy swap but an entire overhaul.
RE: differ between clesd head sprinkler pattern and nozzle spray pattern for the same k factor
my problem with the contractor is the contracotr refuse to change the sprinkler with the same properties nozzles.
RE: differ between clesd head sprinkler pattern and nozzle spray pattern for the same k factor
I suppose I don't see the need for such a specialized system for mercantile.
RE: differ between clesd head sprinkler pattern and nozzle spray pattern for the same k factor
R/
Matt