Zhuhai municipal water supply water pressure

Indoor fire hydrant outlet water pressure Hxh = Hq hd Hk

Hxh - fire hydrant mouth pressure, kPa;

Hq - pressure at the water gun nozzle, kPa;

hd——the water head loss of the water belt; kPa;

Hk——the head loss of the fire hydrant; calculated as 20kPa.

Hq=(a Hm*10)/(1-c a Hm) The coefficient a in the formula is related to the height of the filled water column. When Hm=10m,

a =1.2 coefficient c It is related to the water gun nozzle diameter df. When df=16mm, c =0.0124; Hm - the height of the full water column, generally not less than 10m.

Working pressure of sprinkler head: 98kPa