How much water flows through a fire sprinkler head?
How much water flows through a fire sprinkler head?
A sprinkler system should be designed so that water flow is at least 15 gallons per minute (gpm) and up to a maximum of 40 gpm. Regardless of the type, the standard requires that the water supply for a home fire sprinkler system accommodate one or two operating sprinklers for a period of seven to 10 minutes.
How do you calculate fire sprinkler flow rate?
If, for instance, you have a fire sprinkler with a discharge coefficient of 6.2: 3.87 x 6.2 = 24 gallons per minute. Multiply this individual flow rate by the total number of sprinklers. If your system has, for instance, 15 sprinklers: 24 x 15 = 360 gallons per minute.
What flow rate is needed for a sprinkler system?
If, for example, each sprinkler head will require a flow rate of 1.31 GPM and you have 20 of them, then you will need 26.2 GPM total. If your system can only handle 16.67, you will need to use two zones to cover that same area of your yard.
What GPM is needed for sprinkler system?
What is the average flow rate for a sprinkler system?
4 gallons per minute
Typical sprinkler flow rates may vary from 4 gallons per minute (gpm) from a 5/32-inch nozzle at 30 pounds pressure to over 11 gpm from a 7/32-inch nozzle at 70 pounds pressure. The nozzle size is usually stamped on the nozzle. Wheelmove systems typically have 3/16-inch nozzles.
How are pressure and flow related to fire sprinkler system?
Pressure and flow are both tied to a value called K-factor, which describes how much water flows from a nozzle (like a sprinkler head) at a given pressure. Every fire sprinkler has a specific K-factor. The relationship between pressure (P), flow (Q), and K-factor (K) is:
How many gallons per minute does a fire sprinkler head use?
For example, at 35 pounds per square inch (PSI) the 5000 Series Rotor using the 3.0 nozzle will use 3.11 gallons per minute (GPM). If your home’s water capacity was 10 GPM, you could place 3 heads per zone. Also Know, how many gpm does a fire sprinkler head use?
When do we start hydraulic calculation for fire sprinklers?
When we start any hydraulic calculation for a water based fire protection systems such as a fire sprinklers, water mist systems the k-factor formula is the first which we will need to use and as it is so fundamental all fire protection engineers must have a good understanding of how it works.
Which is the correct k factor for a sprinkler head?
We can sometimes use this to our advantage by selecting the correct sprinkler head k-factor to provide the design density required with the minimum energy requirement (water pressure).